Exhibit 10.3

WARRANT AGREEMENT

WARRANT AGREEMENT (this “Warrant Agreement”) dated as of March 30, 2023 (the “Issuance Date”) between Ribbon Communications Inc., a Delaware corporation (the “Company”), and American Stock Transfer & Trust Company, LLC, a New York limited liability trust company (the “Warrant Agent”).

WHEREAS, the Company is engaged in a private placement of shares of its preferred stock, par value $0.01 per share, and warrants (each a “Warrant” or, collectively, the “Warrants”) entitling holders to purchase shares of the Company’s common stock (the “Common Stock”), par value $0.0001 per share (the “Warrant Shares”);

WHEREAS, the Company desires the Warrant Agent to act on behalf of the Company, and the Warrant Agent is willing to so act, in accordance with the terms set forth in this Warrant Agreement in connection with the issuance, registration, transfer, exchange and exercise of the Warrants;

WHEREAS, the Company desires to provide for the provisions of the Warrants, the terms upon which they shall be issued and exercised, and the respective rights, limitation of rights, and immunities of the Company, the Warrant Agent, and the holders of the Warrants; and

WHEREAS, all acts and things have been done and performed which are necessary to make the Warrants the valid, binding and legal obligations of the Company, and to authorize the execution and delivery of this Warrant Agreement.

NOW, THEREFORE, in consideration of the mutual agreements herein contained, the parties hereto agree as follows:

1. Appointment of Warrant Agent. The Company hereby appoints the Warrant Agent to act as agent for the Company with respect to the Warrants, and the Warrant Agent hereby accepts such appointment and agrees to perform the same in accordance with the express terms and conditions set forth in this Warrant Agreement (and no implied terms or conditions).

2. Warrants.

2.1 Form of Warrants. The Warrants shall be substantially in the form of Exhibit A attached hereto.

2.2 Effect of Countersignature. If a physical certificate is issued, unless and until countersigned by the Warrant Agent pursuant to this Warrant Agreement, a Warrant shall be invalid and of no effect and may not be exercised by the holder thereof.

2.3 Registration.

2.3.1 Warrant Register. The Warrant Agent shall maintain books (the “Warrant Register”) for the registration of the original issuance and transfers of the Warrants. Upon the initial issuance of the Warrants in book-entry form, the Warrant Agent shall issue and register the Warrants in the names of the respective holders thereof in such denominations and otherwise in accordance with instructions delivered to the Warrant Agent by the Company.

2.3.2 Registered Holder. Prior to due presentment for registration of transfer of any Warrant, the Company and the Warrant Agent may deem and treat the person in whose name such Warrant shall be registered upon the Warrant Register (“Registered Holder”) as the absolute owner of such Warrant and of each Warrant represented thereby (notwithstanding any notation of ownership or other writing on the Warrant made by anyone other than the Company or the Warrant Agent), for the purpose of any exercise thereof, and for all other purposes, and neither the Company nor the Warrant Agent shall be affected by any notice to the contrary.

3. Terms and Exercise of Warrants.

3.1 Exercise Price. Each Warrant shall entitle the Registered Holder thereof, subject to the provisions of such Warrant and of this Warrant Agreement, to purchase from the Company the number of shares of Common Stock, stated therein, at the price of $3.77 per share, subject to the adjustments provided in Section 4 hereof (the “Exercise Price”).

3.2 Duration of Warrants. Warrants may be exercised only during the period (“Exercise Period”) commencing on the Issuance Date and terminating at 11:59 P.M., New York time (the “close of business”) on March 30, 2027 (“Expiration Date”), unless the Expiration Date is not a Business Day or a day on which trading takes place on the principal Trading Market (a “Holiday”), in which case the Expiration Date will be the next day that is not a Holiday. Each Warrant not exercised on or before the Expiration Date shall become void, and all rights thereunder and all rights in respect thereof under this Warrant Agreement shall cease at the close of business on the Expiration Date.

3.3 Exercise of Warrant.

3.3.1 Exercise and Payment. Subject to the provisions of this Warrant Agreement and the Warrant, a Registered Holder may exercise the purchase rights represented by the Warrant, in whole or in part, at any time or times on or before the Expiration Date by (i) delivering to the Warrant Agent, a duly executed Exercise Notice in the form attached as Exhibit A to the Warrant (the “Exercise Notice”) and (ii) (A) payment to the Warrant Agent of an amount equal to the applicable Exercise Price multiplied by the number of Warrant Shares as to which the Warrant is being exercised (the “Aggregate Exercise Price”) in cash by wire transfer of immediately available funds to an account designated in writing by the Warrant Agent or (B) by notifying the Company in writing that this Warrant is being exercised pursuant to a Cashless Exercise (as defined below). No ink-original Exercise Notice shall be required, nor shall any medallion guarantee (or other type of guarantee or notarization) of any Exercise Notice be required. The Company acknowledges that the bank accounts maintained by the Warrant Agent in connection with the services provided under this Warrant Agreement will be in its name and that the Warrant Agent may receive investment earnings in connection with the investment at Warrant Agent risk and for its benefit of funds held in those accounts from time to time. Neither the Company nor the Registered Holders will receive interest on any deposits or Exercise Price. If the materials discussed in this Section 3.3.1 are received or deemed to be received after the Expiration Date, the Exercise Notice (or notice of a Cashless Exercise (as defined below)) will be null and void and any funds delivered to the Warrant Agent will be returned to the Registered Holder, as the case may be, as soon as practicable. In no event will interest accrue on any funds deposited with the Warrant Agent in respect of an exercise or attempted exercise of the Warrants.

3.3.2 No Fractional Exercise. No fractional Warrant Shares are to be issued upon the exercise of the Warrant, but rather the number of Warrant Shares to be issued shall be rounded to the nearest whole number.

3.3.3 Cashless Exercise. Notwithstanding anything contained herein to the contrary (other than Section 3.3.7 below), the Registered Holder may, in its sole discretion, exercise this Warrant in whole or in part and, in lieu of making the cash payment otherwise contemplated to be made to the Company upon such exercise in payment of the Aggregate Exercise Price, elect instead to receive upon such exercise the “Net Number” of shares of Common Stock determined according to the following formula (a “Cashless Exercise”):

Net Number = (A x B) - (A x C)

B

For purposes of the foregoing formula:

A= the total number of shares with respect to which the Warrant is then being exercised.

B= as applicable: (i) the Weighted Average Price of the Common Stock on the Trading Day immediately preceding the date of the applicable Exercise Notice if such Exercise Notice is (1) both executed and delivered pursuant to Section 3.3.1 hereof on a day that is not a Trading Day or (2) both executed and delivered pursuant to Section 3.3.1 hereof on a Trading Day prior to the opening of “regular trading hours” (as defined in Rule 600(b)(68) of Regulation NMS promulgated under the federal securities laws) on such Trading Day, (ii) at the option of the Registered Holder indicated in the Exercise Notice, either (x) the Weighted Average Price of the Common Stock on the Trading Day immediately preceding the date of the applicable Exercise Notice, or (y) the Weighted Average Price of the Common Stock on the Trading Day of the applicable Exercise Notice if such Exercise Notice is executed and delivered 3.3.1 during “regular trading hours” on a Trading Day pursuant to Section 3 hereof, or (iii) the Weighted Average Price of the Common Stock on the date of the applicable Exercise Notice if the date of such Exercise Notice is a Trading Day and such Exercise Notice is both executed and delivered pursuant to Section 3.3.1 hereof after the close of “regular trading hours” on such Trading Day.

C= the Exercise Price then in effect for the applicable Warrant Shares at the time of such exercise.

If the Warrant Shares are issued in a Cashless Exercise, the parties acknowledge and agree that in accordance with Section 3(a)(9) of the Securities Act of 1933, as amended (the “1933 Act”), the Warrant Shares take on the registered characteristics of the Warrants being exercised. For purposes of Rule 144(d) promulgated under the 1933 Act, as in effect on the date hereof, it is intended that the Warrant Shares issued in a Cashless Exercise shall be deemed to have been acquired by the Registered Holder, and the holding period for the Warrant Shares shall be deemed to have commenced, on the date this Warrant was originally issued.

The Company will be responsible for determining whether Cashless Exercise applies to a Warrant exercise and will notify the Warrant Agent if it does. The Company shall calculate and transmit to the Warrant Agent, and the Warrant Agent shall have no obligation under this section to calculate, the number of Warrant Shares issuable in connection with the Cashless Exercise. The Warrant Agent will promptly return the Aggregate Exercise Price paid by the Registered Holder in the event a Cashless Exercise applies.

3.3.4 Issuance of Warrant Shares. On or before the first (1^st) Trading Day following the Trading Day on which the Registered Holder has delivered an Exercise Notice and the Aggregate Exercise Price (or notice of a Cashless Exercise) to the Warrant Agent (for purposes of this Warrant Agreement, if an Exercise Notice is delivered to the Warrant Agent on a day that is not a Trading Day, such Exercise Notice shall be deemed to have been delivered on the first Trading Day following the day of actual delivery), the Warrant Agent shall transmit by electronic mail an acknowledgment of confirmation of receipt of the Exercise Notice to the Registered Holder. On or before the earlier of (i) the second (2^nd) Trading Day and (ii) the number of Trading Days comprising the Standard Settlement Period, in each case, following the date on which the Registered Holder has delivered the Exercise Notice and the Aggregate Exercise Price to the Warrant Agent (or notice of a Cashless Exercise to the Company) (a “Share Delivery Date”), the Warrant Agent shall (X) provided that the Company’s transfer agent (the “Transfer Agent”) is participating in The Depository Trust Company (“DTC”) Fast Automated Securities Transfer Program and (A) the Warrant Shares are subject to an effective resale registration statement in favor of the Registered Holder and the Registered Holder has delivered to the Company a representation that such Warrant Shares have been sold pursuant to such registration statement or (B) if exercised via Cashless Exercise, at a time when Rule 144 would be available for immediate resale of the Warrant Shares by the Registered Holder, and the Registered Holder has delivered to the Company a representation that such Warrant Shares have been sold pursuant to Rule 144, cause the aggregate number of Warrant Shares to which the Registered Holder is entitled pursuant to such exercise to be transmitted by the Transfer Agent to the Registered Holder by crediting the Registered Holder’s or its designee’s balance account with DTC through its Deposit / Withdrawal At Custodian system, or (Y) if (A) the Transfer Agent is not participating in the DTC Fast Automated Securities Transfer Program or (B) the Warrant Shares are not subject to an effective resale registration statement in favor of the Registered Holder or the Registered Holder has not delivered to the Company a representation that such Warrant Shares have been sold pursuant to such registration statement and, if exercised via Cashless Exercise, at a time when Rule 144 would not be available for immediate resale of the Warrant Shares by the Registered Holder or the Registered Holder has not delivered to the Company a representation that such Warrant Shares have been sold pursuant to such registration statement, cause the Transfer Agent to (i) issue and dispatch by overnight courier to the address as specified in the Exercise Notice, a certificate, registered in the Company’s share register in the name of the Registered Holder or its designee and bearing such restrictive legends as the Company deems necessary, for the number of Warrant Shares to which the Registered Holder is entitled pursuant to such exercise, or (ii) issue and dispatch by electronic mail to the address as specified in the Exercise Notice, evidence of book entry, registered in the Company’s share register in the name of the Registered Holder or its designee and bearing such restrictive legends as the Company deems necessary, for the number of Warrant Shares to which the Registered Holder is entitled pursuant to such exercise. If fewer than all the Warrants registered in the Warrant Register in the name of the Registered Holder or its designee are exercised, a notation shall be made to Warrant Register maintained by the Warrant Agent, as appropriate, evidencing the balance of the Warrants remaining after such exercise.

3.3.5 Valid Issuance. All shares of Common Stock issued upon the proper exercise or surrender of a Warrant in conformity with this Warrant Agreement shall be validly issued, fully paid and non-assessable.

3.3.6 Date of Issuance. Each person or entity in whose name any such certificate for shares of Common Stock is issued or any book entry for shares of Common Stock is made shall, for all purposes, be deemed to have become the holder of record of such shares on the date on which the Warrant was surrendered and payment of the Exercise Price was made, irrespective of the date of delivery of such certificate or book entry, except that, if the date of such surrender and payment is a date when the stock transfer books of the Company are closed, such person shall be deemed to have become the holder of such shares at the close of business on the next succeeding date on which the stock transfer books are open.

3.3.7 Registered Holder’s Exercise Limitations. Notwithstanding anything to the contrary contained herein, the Warrant Agent shall not effect the exercise of any portion of a Warrant, and the Registered Holder shall not have the right to exercise any portion of a Warrant, and any such exercise shall be null and void and treated as if never made, to the extent that as a result of, and after giving effect to, such exercise, the Registered Holder together with the other Attribution Parties collectively would beneficially own in excess of 9.99% (the “Maximum Percentage”) of the number of shares of Common Stock outstanding immediately after giving effect to such exercise; provided, however, that such Maximum Percentage shall not apply to each of JPMorgan Chase & Co. or Swarth Investments Inc., in each case together with its Attribution Parties. For purposes of this Section 1(e), beneficial ownership shall be calculated in accordance with Section 13(d) of the Securities Exchange Act of 1934, as amended (the “1934 Act”). For purposes of determining the number of outstanding shares of Common Stock the Registered Holder may acquire upon the exercise of a Warrant without exceeding the Maximum Percentage, the Registered Holder may rely on the number of outstanding shares of Common Stock as reflected in (x) the Company’s most recent Annual Report on Form 10-K, Quarterly Report on Form 10-Q, Current Report on Form 8-K or other public filing with the Securities and Exchange Commission (the “SEC”), as the case may be, (y) a more recent public announcement by the Company or (z) any other written notice by the Company or the Transfer Agent setting forth the number of shares of Common Stock outstanding (the “Reported Outstanding Share Number”). If the Warrant Agent receives an Exercise Notice from the Registered Holder at a time when the actual number of outstanding shares of Common Stock is less than the Reported Outstanding Share Number, the Warrant Agent shall (i) notify the Registered Holder in writing of the number of shares of Common Stock then outstanding and, to the extent that such Exercise Notice would otherwise cause the Registered Holder’s beneficial ownership, as determined pursuant to this Section 1(e), to exceed the Maximum Percentage, the Registered Holder must notify the Warrant Agent of a reduced number of Warrant Shares to be purchased pursuant to such Exercise Notice (the number of shares by which such purchase is reduced, the “Reduction Shares”) and (ii) as soon as reasonably practicable, the Warrant Agent shall return to the Registered Holder any Exercise Price paid by the Registered Holder for the Reduction Shares. For any reason at any time, upon the written or oral request of the Registered Holder, the Warrant Agent shall within one (1) Trading Day confirm orally and in writing or by electronic mail to the Registered Holder the number of shares of Common Stock then outstanding. The number of outstanding shares of Common Stock shall be determined after giving effect to the conversion or exercise of securities of the Company, including a Warrant, by the Registered Holder and any other Attribution Party since the date as of which the Reported Outstanding Share Number was reported. In the event that the issuance of shares of Common Stock to the Registered Holder upon exercise of a Warrant results in the Registered Holder and the other Attribution Parties being deemed to beneficially own, in the aggregate, more than the Maximum Percentage of the number of outstanding shares of Common Stock (as determined under Section 13(d) of the 1934 Act), the number of shares so issued by which the Registered Holder’s and the other Attribution Parties’ aggregate beneficial ownership exceeds the Maximum Percentage (the “Excess Shares”) shall be deemed null and void and shall be cancelled ab initio, and the Registered Holder shall not have the power to vote or to transfer the Excess Shares. As soon as reasonably practicable after the issuance of the Excess Shares has been deemed null and void, the Warrant Agent shall return to the Registered Holder the Exercise Price paid by the Registered Holder for the Excess Shares. Upon delivery of a written notice to the Warrant Agent, the Registered Holder may from time to time increase or decrease the Maximum Percentage to any other percentage not in excess of 9.99% as specified in such notice; provided that (i) any such increase in the Maximum Percentage will not be effective until the 61^st day after such notice is delivered to the Warrant Agent and (ii) any such increase or decrease will apply only to the Registered Holder and the other Attribution Parties and not to any other holder of the Warrants that is not an Attribution Party of the Registered Holder. For purposes of clarity, the shares of Common Stock issuable pursuant to the terms of this Warrant Agreement in excess of the Maximum Percentage shall not be deemed to be beneficially owned by the Registered Holder for any purpose including for purposes of Section 13(d) or Rule 16a-1(a)(1) of the 1934 Act. No prior inability to exercise the Warrant pursuant to this paragraph shall have any effect on the applicability of the provisions of this paragraph with respect to any subsequent determination of exercisability. The provisions of this paragraph shall be construed and implemented in a manner otherwise than in strict conformity with the terms of this Section 3.3.7 to the extent necessary to correct this paragraph or any portion of this paragraph which may be defective or inconsistent with the intended beneficial ownership limitation contained in this Section 3.3.7 or to make changes or supplements necessary or desirable to properly give effect to such limitation. The limitation contained in this paragraph may not be waived and shall apply to a successor holder of the Warrant.

4. Adjustments. The Exercise Price, the number of Warrant Shares issuable upon exercise of each Warrant and the number of Warrants outstanding are subject to adjustment from time to time as provided in Section 2 of the Warrant. Upon every adjustment of the Exercise Price or the number of Warrant Shares issuable upon exercise of a Warrant, the Company shall give written notice thereof to the Warrant Agent, which notice shall state the Exercise Price resulting from such adjustment and the increase or decrease, if any, in the number of Warrant Shares purchasable at such price upon the exercise of a Warrant, setting forth in reasonable detail the method of calculation and the facts upon which such calculation is based. As promptly as reasonably practicable following any adjustment of the Exercise Price and/or the number of Warrant Shares, but in any event not later than 15 Business Days thereafter, the Company shall furnish to the Registered Holder a certificate of an executive officer setting forth in reasonable detail such adjustment and the facts upon which it is based and certifying the calculation thereof. The Warrant Agent shall be entitled to rely conclusively on, and shall be fully protected in relying on, any certificate, notice or instructions provided by the Company with respect to any adjustment of the Exercise Price or the number of shares issuable upon exercise of a Warrant, or any related matter, and the Warrant Agent shall not be liable for any action taken, suffered or omitted to be taken by it in accordance with any such certificate, notice or instructions or pursuant to this Warrant Agreement. The Warrant Agent shall not be deemed to have knowledge of any such adjustment unless and until it shall have received written notice thereof from the Company.

5. Fundamental Transactions. In the event of a Fundamental Transaction (as defined in the Warrant), the Company shall make appropriate provision to ensure that (a) the purchaser (or its parent) shall assume each Warrant (with appropriate changes to the Exercise Price to take into account the value of the securities substituted for the Common Stock so as to preserve the intrinsic spread between the fair market value of any substituted securities and the Exercise Price), or (b) Registered Holder will thereafter have the right to receive upon an exercise of a Warrant, in lieu of the shares of the Common Stock (or other securities, cash, assets or other property) issuable upon the exercise of the Warrant prior to such Fundamental Transaction, such securities, cash or other assets (including warrants or other purchase or subscription rights) which the Registered Holder would have been entitled to receive on a per share basis upon the happening of such Fundamental Transaction had such Warrant been exercised immediately prior to such Fundamental Transaction (without regard to any limitations on the exercise of the Warrant); provided, however, that following any Fundamental Transaction, the Warrant shall only be exercisable via Cashless Exercise. The provisions of this Section 5 shall apply similarly and equally to successive Fundamental Transactions.

Notwithstanding the foregoing, at the request of the Registered Holder delivered at any time commencing on the earliest to occur of (a) the public disclosure of the consummation of any Fundamental Transaction, (b) the consummation of any Fundamental Transaction and (c) the Registered Holder first becoming aware of the consummation of any Fundamental Transaction through the date that is 60 days after the public disclosure of the consummation of such Fundamental Transaction by the Company pursuant to a Current Report on Form 8-K filed with the SEC, the Company or the successor entity (as the case may be) shall purchase the Warrant from the Registered Holder on the date of such request by paying to the Registered Holder cash in an amount equal to the Black Scholes Value (as defined below).

6. Transfer and Exchange of Warrants.

6.1 Registration of Transfer. The Warrant Agent shall register the transfer, from time to time, of any outstanding Warrant into the Warrant Register, upon surrender of such Warrant for transfer. Upon any such transfer, a new Warrant representing the right to purchase an equal number of Warrant Shares shall be issued and the old Warrant shall be cancelled by the Warrant Agent. The Warrants so cancelled shall be delivered by the Warrant Agent to the Company from time to time upon the Company’s request. If less than the total number of Warrant Shares then underlying the Warrants is being transferred, a new Warrant shall be issued to the Registered Holder representing the right to purchase the number of Warrant Shares not being transferred.

6.2 Procedure for Surrender of Warrants. Warrants may be surrendered to the Warrant Agent, together with a written request for exchange or transfer, and, thereupon, the Warrant Agent shall issue in exchange therefor one or more new Warrants as requested by the Registered Holder of the Warrants so surrendered, representing an equal aggregate number of Warrants; provided, however, that in the event that a Warrant surrendered for transfer bears a restrictive legend, the Warrant Agent shall not cancel such Warrant and issue new Warrants in exchange thereof until the Warrant Agent has received an opinion of counsel for the Company (who may be in-house counsel) stating that such transfer may be made and indicating whether the new Warrants must also bear the restrictive legend.

6.3 Exchangeable for Multiple Warrants. Warrants are exchangeable, upon the surrender hereof by the Registered Holder at the principal office of the Company, for a new Warrant or Warrants (in accordance with Section 6(d) of the Warrant) representing in the aggregate the right to purchase the number of Warrant Shares then underlying this Warrant, and each such new Warrant will represent the right to purchase such portion of such Warrant Shares as is designated by the Registered Holder at the time of such surrender; provided, however, that no Warrants for fractional Warrant Shares shall be given.

6.3 Fractional Warrants. The Warrant Agent shall not be required to effect any registration of transfer or exchange which will result in the issuance of a warrant certificate for a fraction of a Warrant.

6.4 Service Charges. No service charge shall be made for any exchange or registration of transfer of Warrants.

6.5 Warrant Execution and Countersignature. The Warrant Agent is hereby authorized to countersign and to deliver, in accordance with the terms of this Warrant Agreement, the Warrants required to be issued pursuant to the provisions of this Section 6, and the Company, whenever required by the Warrant Agent, will supply the Warrant Agent with Warrants duly executed on behalf of the Company for such purpose.

7. Other Provisions Relating to Rights of Registered Holders of Warrants.

7.1 No Rights as Stockholder. Except as otherwise specifically provided herein, the Holder, solely in such Person’s capacity as a holder of this Warrant, shall not be entitled to vote or receive dividends or be deemed the holder of capital stock of the Company for any purpose, nor shall anything contained in this Warrant be construed to confer upon the Holder, solely in such Person’s capacity as the Holder of this Warrant, any of the rights of a stockholder of the Company or any right to vote, give or withhold consent to any corporate action (whether any reorganization, issue of stock, reclassification of stock, consolidation, merger, conveyance or otherwise), receive notice of meetings, receive dividends or subscription rights, or otherwise, prior to the issuance to the Holder of the Warrant Shares which such Person is then entitled to receive upon the due exercise of this Warrant. In addition, nothing contained in this Warrant shall be construed as imposing any liabilities on the Holder to purchase any securities (upon exercise of this Warrant or otherwise) or as a stockholder of the Company, whether such liabilities are asserted by the Company or by creditors of the Company.

7.2 Lost, Stolen Mutilated or Destroyed Warrants. Upon receipt by the Company of evidence reasonably satisfactory to the Company of the loss, theft, destruction or mutilation of a Warrant, and, in the case of loss, theft or destruction, of any indemnification undertaking by the Registered Holder to the Company in customary form and, in the case of mutilation, upon surrender and cancellation of the Warrant, the Company and the Warrant Agent shall cause a new Warrant to be delivered to the Registered Holder (in accordance with Section 6(d) of the Warrant) representing the right to purchase the Warrant Shares then underlying the Warrant.

7.3 Reservation of Common Stock. The Company shall at all times reserve and keep available a number of its authorized but unissued shares of Common Stock that will be sufficient to permit the exercise in full of all outstanding Warrants issued pursuant to this Warrant Agreement. The Company will take all such commercially reasonable action as may be necessary to assure that such Warrant Shares may be issued as provided herein without violation of any applicable law or regulation, or of any requirements of the trading market upon which the Common Stock may be listed.

8. Concerning the Warrant Agent and Other Matters.

8.1 Payment of Taxes. The Company will, from time to time, promptly pay all taxes and charges that may be imposed upon the Company or the Warrant Agent in respect of the issuance or delivery of shares of Common Stock upon the exercise of Warrants, but the Company shall not be obligated to pay any transfer taxes in respect of the Warrants or such shares.

8.2 Resignation, Consolidation, or Merger of Warrant Agent.

8.2.1 Appointment of Successor Warrant Agent. The Warrant Agent, or any successor to it hereafter appointed, may resign its duties and be discharged from all further duties and liabilities hereunder after giving 60 days’ notice in writing to the Company. If the office of the Warrant Agent becomes vacant by resignation or incapacity to act or otherwise, the Company shall appoint, in writing, a successor Warrant Agent in place of the Warrant Agent. If the Company shall fail to make such appointment within a period of 30 days after it has been notified in writing of such resignation or incapacity by the Warrant Agent or by the Registered Holder of the Warrant (who shall, with such notice, submit his, her or its Warrant for inspection by the Company), then the Registered Holder of any Warrant may apply to the Supreme Court of the State of New York for the County of New York for the appointment of a successor Warrant Agent. Any successor Warrant Agent, whether appointed by the Company or by such court, shall be a corporation organized and existing under the laws of the State of New York, in good standing and having its principal office in the Borough of Manhattan, City and State of New York, and be authorized under such laws to exercise corporate trust powers and subject to supervision or examination by federal or state authorities. After appointment, any successor Warrant Agent shall be vested with all the authority, powers, rights, immunities, duties and obligations of its predecessor Warrant Agent with like effect as if originally named as Warrant Agent hereunder, without any further act or deed; but, if for any reason it becomes necessary or appropriate, the predecessor Warrant Agent shall execute and deliver, at the expense of the Company, an instrument transferring to such successor Warrant Agent all the authority, powers, and rights of such predecessor Warrant Agent hereunder; and, upon request of any successor Warrant Agent, the Company shall make, execute, acknowledge, and deliver any and all instruments in writing for more fully and effectually vesting in and confirming to such successor Warrant Agent all such authority, powers, rights, immunities, duties and obligations.

8.2.2 Notice of Successor Warrant Agent. In the event a successor Warrant Agent shall be appointed, the Company shall give notice thereof to the predecessor Warrant Agent and the Transfer Agent for the Common Stock not later than the effective date of any such appointment.

8.2.3 Merger or Consolidation of Warrant Agent. Any corporation into which the Warrant Agent may be merged or with which it may be consolidated or any corporation resulting from any merger or consolidation to which the Warrant Agent shall be a party shall be the successor Warrant Agent under this Warrant Agreement without any further act on the part of the Company or the Warrant Agent.

8.3 Fees and Expenses of Warrant Agent.

8.3.1 Remuneration and Reimbursement. The Company agrees to pay the Warrant Agent reasonable remuneration for its services as Warrant Agent and reasonable reimbursement for expenditures incurred as Warrant Agent in accordance with Schedule 1 hereto.

8.3.2 Further Assurances. The Company agrees to perform, execute, acknowledge and deliver, or cause to be performed, executed, acknowledged and delivered, all such further and other acts, instruments and assurances as may reasonably be required by the Warrant Agent for the carrying out or performing of the provisions of this Warrant Agreement.

8.4 Liability of Warrant Agent.

8.4.1 Reliance on Company Statement. Whenever, in the performance of its duties under this Warrant Agreement, the Warrant Agent shall deem it necessary or desirable that any fact or matter be proved or established by the Company prior to taking or suffering any action hereunder, such fact or matter (unless other evidence in respect thereof be herein specifically prescribed) may be deemed to be conclusively proved and established by a statement signed by an officer of the Company and delivered to the Warrant Agent. The Warrant Agent may rely upon such statement for any action taken or suffered in good faith by it pursuant to the provisions of this Warrant Agreement.

8.4.2 Indemnity. The Warrant Agent shall be liable hereunder only for its own gross negligence, willful misconduct or bad faith. The Company agrees to indemnify the Warrant Agent and hold it harmless against any and all liabilities, including judgments, costs and reasonable counsel fees, for anything done or omitted by the Warrant Agent in the execution of this Warrant Agreement, except as a result of the Warrant Agent’s gross negligence, willful misconduct or bad faith.

8.4.3 Exclusions. The Warrant Agent shall have no responsibility with respect to the validity of this Warrant Agreement or with respect to the validity or execution of any Warrant (except its countersignature thereof); nor shall it be responsible for any breach by the Company of any covenant or condition contained in this Warrant Agreement or in any Warrant; nor shall it be responsible to make any adjustments required under the provisions of Section 4 hereof or responsible for the manner, method or amount of any such adjustment or the ascertaining of the existence of facts that would require any such adjustment; nor shall it, by any act hereunder, be deemed to make any representation or warranty as to the authorization or reservation of any shares of Common Stock to be issued pursuant to this Warrant Agreement or any Warrant or as to whether any shares of Common Stock will when issued be valid and fully paid and non-assessable.

8.5 Acceptance of Agency. The Warrant Agent hereby accepts the agency established by this Warrant Agreement and agrees to perform the same upon the terms and conditions herein set forth and, among other things, shall account promptly to the Company with respect to Warrants exercised and concurrently account for, and pay to the Company, all moneys received by the Warrant Agent for the purchase of shares of the Company’s Common Stock through the exercise of Warrants.

9. Miscellaneous Provisions.

9.1 Successors. All the covenants and provisions of this Warrant Agreement by or for the benefit of the Company or the Warrant Agent shall bind and inure to the benefit of their respective successors and assigns.

9.2 Notices. Any notice, statement or demand authorized by this Warrant Agreement to be given or made by the Warrant Agent or by the Registered Holder of any Warrant to or on the Company shall be delivered by hand or sent by registered or certified mail or overnight courier service, addressed (until another address is filed in writing by the Company with the Warrant Agent) as follows:

Ribbon Communications Inc.

6500 Chase Oaks Boulevard

Plano, Texas

Telephone No.: (978) 614-8170

Attention: Patrick Macken

E-mail: pmacken@rbbn.com

and

Troutman Pepper Hamilton Sanders

600 Peachtree Street, N.E., Suite 300

Atlanta, Georgia 30308

Telephone No.: (404) 885-3000

Facsimile No.: (404) 962-6599

Attention: David W. Ghegan

E-mail: david.ghegan@troutman.com

Any notice, statement or demand authorized by this Warrant Agreement to be given or made by the Registered Holder of any Warrant or by the Company to or on the Warrant Agent shall be delivered by hand or sent by registered or certified mail or overnight courier service, addressed (until another address is filed in writing by the Warrant Agent with the Company), as follows:

American Stock Transfer & Trust Company, LLC

63201 15th Avenue

Brooklyn, New York 11219

Attention: Reorgwarrants@astfinancial.com

Any notice sent pursuant to this Warrant Agreement shall be effective, if delivered by hand, upon receipt thereof by the party to whom it is addressed, if sent by overnight courier, on the next business day of the delivery to the courier, and if sent by registered or certified mail on the third day after registration or certification thereof.

9.3 Applicable Law. The validity, interpretation, and performance of this Warrant Agreement and of the Warrants shall be governed in all respects by the laws of the State of New York. The Company and the Warrant Agent hereby agree that any action, proceeding or claim against either of them arising out of or relating in any way to this Warrant Agreement shall be brought and enforced in the state and federal courts sitting in the City of New York, Borough of Manhattan, and irrevocably submits to such jurisdiction, which jurisdiction shall be exclusive. The Company and the Warrant Agent hereby waive any objection to such exclusive jurisdiction and that such courts represent an inconvenient forum. Any such process or summons to be served upon the Company or the Warrant Agent may be served by transmitting a copy thereof by registered or certified mail, return receipt requested, postage prepaid, addressed to it at the address set forth in Section 9.2 hereof. Such mailing shall be deemed personal service and shall be legal and binding upon the party receiving such service in any action, proceeding or claim.

9.4 Persons Having Rights under this Warrant Agreement. Nothing in this Warrant Agreement expressed and nothing that may be implied from any of the provisions hereof is intended, or shall be construed, to confer upon, or give to, any person or corporation other than the parties hereto and the Registered Holders of the Warrants. All covenants, conditions, stipulations, promises, and agreements contained in this Warrant Agreement shall be for the sole and exclusive benefit of the parties hereto and their successors and assigns and of the Registered Holders of the Warrants.

9.5 Examination of the Warrant Agreement. A copy of this Warrant Agreement shall be available at all reasonable times at the office of the Warrant Agent in the Borough of Manhattan, City and State of New York, for inspection by the Registered Holder of any Warrant. The Warrant Agent may require any such Registered Holder to submit his, her or its Warrant for inspection.

9.6 Counterparts — Facsimile Signatures. This Warrant Agreement may be executed in any number of counterparts, and each of such counterparts shall, for all purposes, be deemed to be an original, and all such counterparts shall together constitute one and the same instrument. Facsimile signatures shall constitute original signatures for all purposes of this Warrant Agreement.

9.7 Effect of Headings. The section headings herein are for convenience only and are not part of this Warrant Agreement and shall not affect the interpretation thereof

9.8 Amendments. This Warrant Agreement and any Warrant may be amended by the parties hereto by executing a supplemental warrant agreement, without the consent of any of the Registered Holders, for the purpose of (i) curing any ambiguity, or curing, correcting or supplementing any defective provision contained herein, or making any other provisions with respect to matters or questions arising under this Warrant Agreement that is not inconsistent with the provisions of this Warrant Agreement or the Warrant, (ii) evidencing the succession of another corporation to the Company and the assumption by any such successor of the covenants of the Company contained in this Warrant Agreement and the Warrants, (iii) evidencing and providing for the acceptance of appointment by a successor Warrant Agent with respect to the Warrants, (iv) adding to the covenants of the Company for the benefit of the Registered Holders or surrendering any right or power conferred upon the Company under this Warrant Agreement, or (v) amending this Warrant Agreement and the Warrants in any manner that the Company may deem to be necessary or desirable and that will not adversely affect the interests of the Registered Holders in any material respect. All other modifications or amendments to this Warrant Agreement, including any amendment to increase the Exercise Price or shorten the Exercise Period, shall require the written consent of the Registered Holders of a majority of the then outstanding Warrants. Notwithstanding the foregoing, the Company may extend the duration of the Exercise Period in accordance with Section 3.2 without such consent.

9.9 Severability. This Warrant Agreement shall be deemed severable, and the invalidity or unenforceability of any term or provision hereof shall not affect the validity or enforceability of this Warrant Agreement or of any other term or provision hereof. Furthermore, in lieu of any such invalid or unenforceable term or provision, the parties hereto intend that there shall be added as a part of this Warrant Agreement a provision as similar in terms to such invalid or unenforceable provision as may be possible and be valid and enforceable.

10. Certain Definitions. As used herein, the following terms shall have the following meanings:

(a) “Black Scholes Value” means the value of the unexercised portion of this Warrant remaining on the date of the Registered Holder’s request pursuant to Section 3, which value is calculated using the Black Scholes Option Pricing Model obtained from the “OV” function on Bloomberg utilizing (i) an underlying price per share equal to the greater of (1) the highest closing sale price of the Common Stock during the period beginning on the Trading Day immediately preceding the announcement of the applicable Fundamental Transaction (or the consummation of the applicable Fundamental Transaction, if earlier) and ending on the Trading Day of the Registered Holder’s request pursuant to Section 3 and (2) the sum of the price per share being offered in cash in the applicable Fundamental Transaction (if any) plus the value of the non-cash consideration being offered in the applicable Fundamental Transaction (if any), (ii) a strike price equal to the Exercise Price in effect on the date of the Registered Holder’s request pursuant to Section 3, (iii) a risk-free interest rate corresponding to the U.S. Treasury rate for a period equal to the greater of (1) the remaining term of this Warrant as of the date of the Registered Holder’s request pursuant to Section 3 and (2) the remaining term of this Warrant as of the date of consummation of the applicable Fundamental Transaction or as of the date of the Registered Holder’s request pursuant to Section 3 if such request is prior to the date of the consummation of the applicable Fundamental Transaction, (iv) a zero cost of borrow and (v) an expected volatility equal to the greater of 100% and the 30 day volatility obtained from the “HVT” function on Bloomberg (determined utilizing a 365 day annualization factor) as of the Trading Day immediately following the earliest to occur of (A) the public disclosure of the applicable Fundamental Transaction and (B) the date of the Registered Holder’s request pursuant to Section 3.

(b) “Business Day” means any day other than Saturday, Sunday or other day on which commercial banks in The City of New York are authorized or required by law to remain closed; provided that banks shall not be deemed to be authorized or obligated to be closed due to a “shelter in place,” “non-essential employee” or similar closure of physical branch locations at the direction of any governmental authority if such banks’ electronic funds transfer systems (including for wire transfers) are open for use by customers on such day.

(c) “Standard Settlement Period” means the standard settlement period, expressed in a number of Trading Days, on the Company’s primary Trading Market with respect to the Common Stock as in effect on the date of delivery of the Exercise Notice.

(d) “Trading Day” means a day on which the Common Stock generally occurs on the Trading Market; provided that if Common Stock is not so listed or traded, “Trading Day” means a Business Day.

(e) “Trading Market” means any of the following markets or exchanges on which the Common Stock is listed or quoted for trading on the date in question: the NYSE American, the Nasdaq Capital Market, the Nasdaq Global Market, the Nasdaq Global Select Market or the New York Stock Exchange (or any successors to any of the foregoing).

(f) “Warrant Share Delivery Date” means the date that is the earliest of: (i) two (2) Trading Days after the delivery to the Company of the Exercise Notice, and (ii) the number of Trading Days comprising the Standard Settlement Period after the delivery to the Company of the Exercise Notice, all subject to receipt of any cash payments required by the Registered Holder.

[Signature Page to Follow]

IN WITNESS WHEREOF, this Warrant Agreement has been duly executed by the parties hereto as of the day and year first above written.

RIBBON COMMUNICATIONS INC.
By:	/s/ Bruce McClelland
Name: Bruce McClelland
Title:   President and Chief Executive Officer

[Signature Page - Warrant Agreement]

AMERICAN STOCK TRANSFER & TRUST COMPANY
By:	/s/ Michael Legregin
Name: Michael Legregin
Title:   Senior Vice President

[Signature Page - Warrant Agreement]

EXHIBIT A

FORM OF WARRANT

THESE SECURITIES AND THE SECURITIES ISSUABLE UPON EXERCISE OF THESE SECURITIES HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE “SECURITIES ACT”), OR APPLICABLE STATE SECURITIES LAWS. THE SECURITIES AND THE SECURITIES ISSUABLE UPON EXERCISE OF THESE SECURITIES MAY NOT BE OFFERED FOR SALE, SOLD, TRANSFERRED OR ASSIGNED (I) IN THE ABSENCE OF (A) AN EFFECTIVE REGISTRATION STATEMENT FOR THE SECURITIES UNDER THE SECURITIES ACT OR (B) AN AVAILABLE EXEMPTION FROM, OR IN A TRANSACTION NOT SUBJECT TO, THE REGISTRATION REQUIREMENTS OF THE SECURITIES ACT AND IN ACCORDANCE WITH APPLICABLE STATE SECURITIES LAWS OR BLUE SKY LAWS AS EVIDENCED BY A LEGAL OPINION OF COUNSEL REASONABLY SATISFACTORY TO THE COMPANY AND ITS TRANSFER AGENT OR (II) UNLESS SOLD PURSUANT TO RULE 144 UNDER THE SECURITIES ACT. NOTWITHSTANDING THE FOREGOING, THE SECURITIES AND THE SECURITIES ISSUABLE UPON EXERCISE OF THESE SECURITIES MAY BE PLEDGED IN CONNECTION WITH A BONA FIDE MARGIN ACCOUNT OR OTHER LOAN OR FINANCING ARRANGEMENT SECURED BY THE SECURITIES.

THIS WARRANT IS ONE OF THE WARRANTS TO PURCHASE COMMON STOCK ISSUED PURSUANT TO THAT CERTAIN SECURITIES PURCHASE AGREEMENT, DATED AS OF MARCH 28, 2023, BY AND AMONG THE COMPANY AND THE INVESTORS REFERRED TO THEREIN. ANY HOLDER OF THIS WARRANT TAKES SUCH WARRANT SUBJECT TO THE TERMS AND CONDITIONS OF SUCH SECURITIES PURCHASE AGREEMENT AND, BY ITS ACCEPTANCE HEREOF, AGREES TO ABIDE BY THE TERMS AND CONDITIONS THEREOF NOTWITHSTANDING ANYTHING TO THE CONTRARY SET FORTH HEREIN.

RIBBON COMMUNICATIONS INC.

Warrant To Purchase Common Stock

Warrant No.: [•]

Number of Shares of Common Stock: [•]

Date of Issuance: March 30, 2023 (“Issuance Date”)

Ribbon Communications Inc., a Delaware corporation (the “Company”), hereby certifies that, for good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, [Investor], the registered holder hereof or its permitted assigns (the “Holder”), is entitled, subject to the terms set forth below, to purchase from the Company, at the Exercise Price (as defined below) then in effect, at any time or times on or after the Issuance Date, but not after 11:59 p.m., New York time, on the Expiration Date, (as defined below), [•] ([•]) fully paid nonassessable shares of Common Stock, subject to adjustment as provided herein (the “Warrant Shares”). Except as otherwise defined herein, capitalized terms in this Warrant to Purchase Common Stock (including any Warrants to Purchase Common Stock issued in exchange, transfer or replacement hereof, this “Warrant”), shall have the meanings set forth in Section 16. This Warrant is one of the Warrants to purchase Common Stock (the “March 2023 Warrants”) issued pursuant to Section 2.2(a)(iii) of that certain Securities Purchase Agreement, dated as of March [•], 2023 (the “Subscription Date”), by and among the Company and the investors (the “Purchasers”) referred to therein (the “Securities Purchase Agreement”). Capitalized terms used herein and not otherwise defined shall have the definitions ascribed to such terms in the Securities Purchase Agreement.

1. EXERCISE OF WARRANT.

(a)  Mechanics of Exercise. Subject to the terms and conditions hereof (including, without limitation, the limitations set forth in Section 1(e)), this Warrant may be exercised by the Holder at any time or times on or after the Issuance Date, in whole or in part, by (i) delivery to the Warrant Agent of a duly executed written notice, in the form attached hereto as Exhibit A (the “Exercise Notice”), of the Holder’s election to exercise this Warrant and (ii) (A) payment to the Warrant Agent of an amount equal to the applicable Exercise Price multiplied by the number of Warrant Shares as to which this Warrant is being exercised (the “Aggregate Exercise Price”) in cash by wire transfer of immediately available funds to an account designated in writing by the Warrant Agent or (B) by notifying the Company in writing that this Warrant is being exercised pursuant to a Cashless Exercise (as defined in Section 1(c)). No ink-original Exercise Notice shall be required, nor shall any medallion guarantee (or other type of guarantee or notarization) of any Exercise Notice be required, provided that the Warrant Agent and the Company shall have no liability to the Holder for honoring a non-medallion guaranteed Exercise Notice that the Warrant Agent or the Company reasonably believes to be genuine. The registered Holder shall not be required to deliver the original Warrant in order to effect an exercise hereunder. Execution and delivery of the Exercise Notice with respect to less than all of the Warrant Shares shall have the same effect as cancellation of the original Warrant and issuance of a new Warrant evidencing the right to purchase the remaining number of Warrant Shares. On or before the first (1^st) Trading Day following the Trading Day on which the Holder has delivered an Exercise Notice and the Aggregate Exercise Price (or notice of a Cashless Exercise) to the Warrant Agent (for purposes of this Warrant, if an Exercise Notice is delivered to the Warrant Agent on a day that is not a Trading Day, such Exercise Notice shall be deemed to have been delivered on the first Trading Day following the day of actual delivery), the Warrant Agent shall transmit by electronic mail an acknowledgment of confirmation of receipt of the Exercise Notice to the Holder. On or before the earlier of (i) the second (2^nd) Trading Day and (ii) the number of Trading Days comprising the Standard Settlement Period, in each case, following the date on which the Holder has delivered the Exercise Notice and the Aggregate Exercise Price to the Warrant Agent (or notice of a Cashless Exercise to the Company) (a “Share Delivery Date”), the Warrant Agent shall (X) provided that the Company’s transfer agent (the “Transfer Agent”) is participating in The Depository Trust Company (“DTC”) Fast Automated Securities Transfer Program and (A) the Warrant Shares are subject to an effective resale registration statement in favor of the Holder and the Holder has delivered to the Company a representation that such Warrant Shares have been sold pursuant to such registration statement or (B) if exercised via Cashless Exercise, at a time when Rule 144 would be available for immediate resale of the Warrant Shares by the Holder, and the Holder has delivered to the Company a representation that such Warrant Shares have been sold pursuant to Rule 144, cause the aggregate number of Warrant Shares to which the Holder is entitled pursuant to such exercise to be transmitted by Transfer Agent to the Holder by crediting the Holder’s or its designee’s balance account with DTC through its Deposit / Withdrawal At Custodian system, or (Y) if (A) the Transfer Agent is not participating in the DTC Fast Automated Securities Transfer Program or (B) the Warrant Shares are not subject to an effective resale registration statement in favor of the Holder or the Holder has not delivered to the Company a representation that such Warrant Shares have been sold pursuant to such registration statement and, if exercised via Cashless Exercise, at a time when Rule 144 would not be available for immediate resale of the Warrant Shares by the Holder or the Holder has not delivered to the Company a representation that such Warrant Shares have been sold pursuant to such registration statement, cause the Transfer Agent to (i) issue and dispatch by overnight courier to the address as specified in the Exercise Notice, a certificate, registered in the Company’s share register in the name of the Holder or its designee and bearing such restrictive legends as the Company deems necessary, for the number of Warrant Shares to which the Holder is entitled pursuant to such exercise, or (ii) issue and dispatch by electronic mail to the address as specified in the Exercise Notice, evidence of book entry, registered in the Company’s share register in the name of the Holder or its designee and bearing such restrictive legends as the Company deems necessary, for the number of Warrant Shares to which the Holder is entitled pursuant to such exercise. The Company shall be responsible for all fees and expenses of the Warrant Agent and the Transfer Agent and all fees and expenses with respect to the issuance of Warrant Shares via DTC, if any, including without limitation for same day processing. Upon delivery of the Exercise Notice and the Aggregate Exercise Price (or notice of a Cashless Exercise), the Holder shall be deemed for all corporate purposes to have become the holder of record of the Warrant Shares with respect to which this Warrant has been exercised, irrespective of the date such Warrant Shares are credited to the Holder’s DTC account or the date of delivery of the certificates or book entry evidence evidencing such Warrant Shares, as the case may be. If this Warrant is submitted in connection with any exercise pursuant to this Section 1(a) and the number of Warrant Shares represented by this Warrant submitted for exercise is greater than the number of Warrant Shares being acquired upon an exercise, then the Company shall as soon as practicable and in no event later than five (5) Trading Days after any exercise and at its own expense, issue a new Warrant (in accordance with Section 6(d)) representing the right to purchase the number of Warrant Shares issuable immediately prior to such exercise under this Warrant, less the number of Warrant Shares with respect to which this Warrant is exercised. No fractional Warrant Shares are to be issued upon the exercise of this Warrant, but rather the number of Warrant Shares to be issued shall be rounded to the nearest whole number. The Company shall pay any and all taxes which may be payable with respect to the issuance and delivery of Warrant Shares upon exercise of this Warrant. If the materials discussed in this Section 1(a) are received or deemed to be received after the Expiration Date, the Exercise Notice (or notice of a Cashless Exercise) will be null and void and any funds delivered to the Company will be returned to the Holder, as soon as practicable. In no event will interest accrue on any funds deposited with the Company or its warrant agent in respect of an exercise or attempted exercise of the Warrants.

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(b)  Exercise Price. For purposes of this Warrant, “Exercise Price” means $3.77, subject to adjustment as provided herein.

(c)  Company’s Failure to Timely Deliver Securities. If either (i) the Company shall fail for any reason or for no reason to issue to the Holder on or prior to the applicable Share Delivery Date, if (A) the Transfer Agent is not participating in the DTC Fast Automated Securities Transfer Program, a certificate or book entry for the number of shares of Common Stock to which the Holder is entitled and register such Common Stock on the Company’s share register or (B) if the Transfer Agent is participating in the DTC Fast Automated Securities Transfer Program, to credit the Holder’s balance account with DTC, for such number of shares of Common Stock to which the Holder is entitled upon the Holder’s exercise of this Warrant, (ii) the Company shall not within thirty (30) days after the Issuance Date file with the SEC a registration statement for the resale by the Holder or any transferee therefrom of the Warrant Shares (the “Registration Statement”), or (iii) a registration statement (which may be the Registration Statement) covering the issuance or resale of the Warrant Shares is not available for the issuance or resale, as applicable, of such Warrant Shares during a time when a registration statement is required to be available pursuant to the Securities Purchase Agreement and (A) the Company fails to promptly, but in no event later than one (1) Business Day after such registration statement becomes unavailable, to so notify the Holder and (B) the Company is unable to deliver the Warrant Shares electronically without any restrictive legend by crediting such aggregate number of Warrant Shares to the Holder’s or its designee’s balance account with DTC through its Deposit / Withdrawal At Custodian system (the event described in the immediately foregoing clause (iii) is hereinafter referred as a “Notice Failure” and together with the events described in clauses (i) and (ii) above, an “Exercise Failure”), then, in addition to all other remedies available to the Holder, if on or prior to the applicable Share Delivery Date either (i) if the Transfer Agent is not participating in the DTC Fast Automated Securities Transfer Program, the Company shall fail to issue and deliver a certificate or book entry to the Holder and register such shares of Common Stock on the Company’s share register or, if the Transfer Agent is participating in the DTC Fast Automated Securities Transfer Program, credit the Holder’s balance account with DTC for the number of shares of Common Stock to which the Holder is entitled upon the Holder’s exercise hereunder or pursuant to the Company’s obligation pursuant to clause (II) below or (ii) a Notice Failure occurs, and if on or after such Trading Day the Holder purchases (in an open market transaction or otherwise) Common Stock to deliver in satisfaction of a sale by the Holder of shares of Common Stock issuable upon such exercise that the Holder anticipated receiving from the Company (a “Buy-In”), then the Company shall, within three (3) Trading Days after the Holder’s request and in the Holder’s discretion, either (I) pay cash to the Holder in an amount equal to the Holder’s total purchase price (including brokerage commissions and other out-of-pocket expenses, if any) for the shares of Common Stock so purchased (the “Buy-In Price”), at which point the Company’s obligation to deliver such certificate (and to issue such shares of Common Stock) or credit such Holder’s balance account with DTC for such shares of Common Stock shall terminate, or (II) promptly honor its obligation to deliver to the Holder a certificate or certificates or book entry or entries representing such shares of Common Stock or credit such Holder’s balance account with DTC, as applicable, and pay cash to the Holder in an amount equal to the excess (if any) of the Buy-In Price over the product of (x) such number of shares of Common Stock, times (y) any trading price of the Common Stock selected by the Holder in writing as in effect at any time during the period beginning on the date of the applicable Exercise Notice and ending on the applicable Share Delivery Date.

Nothing shall limit the Holder’s right to pursue any other remedies available to it hereunder, at law or in equity, including, without limitation, a decree of specific performance and/or injunctive relief with respect to the Company’s failure to timely deliver certificates representing Warrant Shares (or to electronically deliver such Warrant Shares) upon the exercise of this Warrant as required pursuant to the terms hereof. While this Warrant is outstanding, the Company shall cause the Transfer Agent to participate in the DTC Fast Automated Securities Transfer Program. In addition to the foregoing rights, (i) if the Company fails to deliver the applicable number of Warrant Shares upon an exercise pursuant to Section 1(a) by the applicable Share Delivery Date, then the Holder shall have the right to rescind such exercise in whole or in part and retain and/or have the Company return, as the case may be, any portion of this Warrant that has not been exercised pursuant to such Exercise Notice; provided that the rescission of an exercise shall not affect the Company’s obligation to make any payments that have accrued prior to the date of such notice pursuant to this Section 1(c) or otherwise, and (ii) if a registration statement (which may be the Registration Statement) covering the issuance or resale of the Warrant Shares that are subject to an Exercise Notice is not available for the issuance or resale, as applicable, of such Warrant Shares during a time when a registration statement is required to be available pursuant to the Securities Purchase Agreement and the Holder has submitted an Exercise Notice prior to receiving notice of the non-availability of such registration statement and the Company has not already delivered the Warrant Shares underlying such Exercise Notice electronically without any restrictive legend by crediting such aggregate number of Warrant Shares to which the Holder is entitled pursuant to such exercise to the Holder’s or its designee’s balance account with DTC through its Deposit / Withdrawal At Custodian system, the Holder shall have the option, by delivery of notice to the Company, to rescind such Exercise Notice in whole or in part and retain or have returned, as the case may be, any portion of this Warrant that has not been exercised pursuant to such Exercise Notice; provided that the rescission of an Exercise Notice shall not affect the Company’s obligation to make any payments that have accrued prior to the date of such notice pursuant to this Section 1(c) or otherwise.

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(d)  Cashless Exercise. Notwithstanding anything contained herein to the contrary, the Holder may, in its sole discretion, exercise this Warrant in whole or in part and, in lieu of making the cash payment otherwise contemplated to be made to the Company upon such exercise in payment of the Aggregate Exercise Price, elect instead to receive upon such exercise the “Net Number” of shares of Common Stock determined according to the following formula (a “Cashless Exercise”):

Net Number = (A x B) – (A x C)

B

For purposes of the foregoing formula:

A= the total number of shares with respect to which this Warrant is then being exercised.

B= as applicable: (i) the Weighted Average Price of the Common Stock on the Trading Day immediately preceding the date of the applicable Exercise Notice if such Exercise Notice is (1) both executed and delivered pursuant to Section 1(a) hereof on a day that is not a Trading Day or (2) both executed and delivered pursuant to Section 1(a) hereof on a Trading Day prior to the opening of “regular trading hours” (as defined in Rule 600(b)(68) of Regulation NMS promulgated under the federal securities laws) on such Trading Day, (ii) at the option of the Holder indicated in the Exercise Notice, either (x) the Weighted Average Price of the Common Stock on the Trading Day immediately preceding the date of the applicable Exercise Notice, or (y) the Weighted Average Price of the Common Stock on the Trading Day of the applicable Exercise Notice if such Exercise Notice is executed and delivered during “regular trading hours” on a Trading Day pursuant to Section 1(a) hereof, or (iii) the Weighted Average Price of the Common Stock on the date of the applicable Exercise Notice if the date of such Exercise Notice is a Trading Day and such Exercise Notice is both executed and delivered pursuant to Section 1(a) hereof after the close of “regular trading hours” on such Trading Day.

C= the Exercise Price then in effect for the applicable Warrant Shares at the time of such exercise.

(e)  Disputes. In the case of a dispute as to the determination of the Exercise Price, the Black Scholes Value (as defined below) or the arithmetic calculation of the Warrant Shares, the Company shall promptly issue to the Holder the number of Warrant Shares that are not disputed and resolve such dispute in accordance with Section 13.

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(f)  Beneficial Ownership Limitations on Exercises. Notwithstanding anything to the contrary contained herein, the Warrant Agent shall not effect the exercise of any portion of this Warrant, and the Holder shall not have the right to exercise any portion of this Warrant, and any such exercise shall be null and void and treated as if never made, to the extent that as a result of, and after giving effect to, such exercise, the Holder together with the other Attribution Parties collectively would beneficially own in excess of 9.99% (the “Maximum Percentage”) of the number of shares of Common Stock outstanding immediately after giving effect to such exercise; provided, however, that such Maximum Percentage shall not apply to either JPMorgan Chase & Co. or Swarth Investments Inc., in each case together with its Attribution Parties. For purposes of this Section 1(e), beneficial ownership shall be calculated in accordance with Section 13(d) of the Securities Exchange Act of 1934, as amended (the “1934 Act”). For purposes of determining the number of outstanding shares of Common Stock the Holder may acquire upon the exercise of this Warrant without exceeding the Maximum Percentage, the Holder may rely on the number of outstanding shares of Common Stock as reflected in (x) the Company’s most recent Annual Report on Form 10-K, Quarterly Report on Form 10-Q, Current Report on Form 8-K or other public filing with the Securities and Exchange Commission (the “SEC”), as the case may be, (y) a more recent public announcement by the Company or (z) any other written notice by the Company or the Transfer Agent setting forth the number of shares of Common Stock outstanding (the “Reported Outstanding Share Number”). If the Warrant Agent receives an Exercise Notice from the Holder at a time when the actual number of outstanding shares of Common Stock is less than the Reported Outstanding Share Number, the Company shall (i) notify the Holder in writing of the number of shares of Common Stock then outstanding and, to the extent that such Exercise Notice would otherwise cause the Holder’s beneficial ownership, as determined pursuant to this Section 1(e), to exceed the Maximum Percentage, the Holder must notify the Warrant Agent of a reduced number of Warrant Shares to be purchased pursuant to such Exercise Notice (the number of shares by which such purchase is reduced, the “Reduction Shares”) and (ii) as soon as reasonably practicable, the Warrant Agent shall return to the Holder any Exercise Price paid by the Holder for the Reduction Shares. For any reason at any time, upon the written or oral request of the Holder, the Warrant Agent shall within one (1) Trading Day confirm orally and in writing or by electronic mail to the Holder the number of shares of Common Stock then outstanding. The number of outstanding shares of Common Stock shall be determined after giving effect to the conversion or exercise of securities of the Company, including this Warrant, by the Holder and any other Attribution Party since the date as of which the Reported Outstanding Share Number was reported. In the event that the issuance of shares of Common Stock to the Holder upon exercise of this Warrant results in the Holder and the other Attribution Parties being deemed to beneficially own, in the aggregate, more than the Maximum Percentage of the number of outstanding shares of Common Stock (as determined under Section 13(d) of the 1934 Act), the number of shares so issued by which the Holder’s and the other Attribution Parties’ aggregate beneficial ownership exceeds the Maximum Percentage (the “Excess Shares”) shall be deemed null and void and shall be cancelled ab initio, and the Holder shall not have the power to vote or to transfer the Excess Shares. As soon as reasonably practicable after the issuance of the Excess Shares has been deemed null and void, the Warrant Agent shall return to the Holder the Exercise Price paid by the Holder for the Excess Shares. Upon delivery of a written notice to the Warrant Agent, the Holder may from time to time increase or decrease the Maximum Percentage to any other percentage as specified in such notice; provided that (i) any such increase in the Maximum Percentage will not be effective until the sixty-first (61^st) day after such notice is delivered to the Warrant Agent and (ii) any such increase or decrease will apply only to the Holder and the other Attribution Parties and not to any other holder of March 2023 Warrants that is not an Attribution Party of the Holder. For purposes of clarity, the shares of Common Stock issuable pursuant to the terms of this Warrant in excess of the Maximum Percentage shall not be deemed to be beneficially owned by the Holder for any purpose including for purposes of Section 13(d) or Rule 16a-1(a)(1) of the 1934 Act. No prior inability to exercise this Warrant pursuant to this paragraph shall have any effect on the applicability of the provisions of this paragraph with respect to any subsequent determination of exercisability. The provisions of this paragraph shall be construed and implemented in a manner otherwise than in strict conformity with the terms of this Section 1(e) to the extent necessary to correct this paragraph or any portion of this paragraph which may be defective or inconsistent with the intended beneficial ownership limitation contained in this Section 1(e) or to make changes or supplements necessary or desirable to properly give effect to such limitation. The limitation contained in this paragraph may not be waived and shall apply to a successor holder of this Warrant.

2. ADJUSTMENT OF EXERCISE PRICE AND NUMBER OF WARRANT SHARES.

(a)  Adjustment Upon Subdivision or Combination of Shares of Common Stock. If the Company at any time on or after the Subscription Date subdivides (by any stock split, stock dividend, recapitalization or otherwise) its outstanding shares of Common Stock into a greater number of shares, the Exercise Price in effect immediately prior to such subdivision will be proportionately reduced and the number of Warrant Shares will be proportionately increased. If the Company at any time on or after the Subscription Date combines (by combination, reverse stock split or otherwise) its outstanding shares of Common Stock into a smaller number of shares, the Exercise Price in effect immediately prior to such combination will be proportionately increased and the number of Warrant Shares will be proportionately decreased. Any adjustment under this Section 2(a) shall become effective at the close of business on the date the subdivision or combination becomes effective.

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(b)  Adjustment to Exercise Price and Number of Warrant Shares for Subsequent Issuances. In order to prevent dilution of the purchase rights granted under this Warrant, the Exercise Price and the number of Warrant Shares issuable upon exercise of this Warrant shall be subject to adjustment from time to time as provided in this Section 2(b) (in each case, after taking into consideration any prior adjustments pursuant to this Section 2(b) or otherwise), with any such adjustment automatically becoming effective without further action of any person required; provided, that there shall be no adjustment to the number of Warrant Shares acquirable upon exercise of the Warrant, as provided in this Section 2(b) (an “Adjustment”), unless and until such Adjustment, together with any previous Adjustments to the number of Warrant Shares so acquirable which would otherwise have resulted in an Adjustment were it not for this proviso, would require an increase or decrease of at least 5% of the total number of Warrant Shares so acquirable at the time of such Adjustment, in which event such Adjustment and all such previous Adjustments shall immediately occur.

(i)  Definitions. For purposes of this Section 2(b), the following terms shall have the following meanings:

“Excluded Issuances” means any issuance or sale (or deemed issuance or sale in accordance with Section 2(b)(iv)) by the Company after the Issuance Date of: (a) shares of Common Stock issued upon the exercise of the Warrants; or (b) shares of Common Stock under the Company’s Amended and Restated 2019 Incentive Award Plan.

“Independent Financial Expert” shall mean a nationally recognized accounting, investment banking or consultant firm, which firm does not have a material financial interest or other material economic relationship with either the Company or any of its Affiliates or the Holder or any of its Affiliates that is, in the good faith judgment of the Company’s board of directors (the “Board”), qualified to perform the task for which it has been engaged.

“Trading Day” shall mean a day on which trading in the shares of Common Stock (or other applicable security) generally occurs on the principal exchange or market on which the shares of Common Stock (or other applicable security) are then listed or traded; provided that if the shares of Common Stock (or other applicable security) are not so listed or traded, “Trading Day” means a Business Day.

“VWAP” shall mean, as of any date of determination, the average per share volume-weighted average price as displayed under the heading “Bloomberg VWAP” on Bloomberg page “RBBN US<equity> VAP” (or its equivalent successor if such Bloomberg page is not available) in respect of the period from the open of trading on the relevant Trading Day until the close of trading on such Trading Day (or if such volume-weighted average price is unavailable, the market value of one share of Common Stock on such Trading Day reasonably determined, using a volume-weighted average method, by an Independent Financial Expert appointed (and compensated by the Company) for such purpose). The VWAP will be determined without regard to after-hours trading or any other trading outside of the regular trading session trading hours.

(ii)  Adjustment for Common Stock Issuances. If the Company shall, at any time or from time to time after the Issuance Date, issue or sell, or is deemed to have issued or sold, any shares of Common Stock for consideration per share less than the Exercise Price in effect immediately prior to such issuance or sale (or deemed issuance or sale) (“Adjustment Trigger Shares”), then immediately upon such issuance or sale (or deemed issuance or sale), the Exercise Price shall be reduced to the weighted average per share consideration received by the Company for all Adjustment Trigger Shares so issued or sold (or deemed issued or sold) from and after the Issuance Date, as determined in good faith by the Board, and the number of Warrant Shares will be proportionately increased.

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(iii)  Exceptions to Adjustment Upon Issuance of Common Stock. Anything herein to the contrary notwithstanding, there shall be no adjustment to the Exercise Price or the number of Warrant Shares issuable upon exercise of this Warrant with respect to any Excluded Issuance.

(iv)  Adjustment for Certain Events. For purposes of determining the adjusted Exercise Price and number of Warrant Shares under Section 1(a) hereof, the following shall be applicable:

(A)            Issuance of Options. If the Company shall, at any time or from time to time after the Issuance Date, grant or sell any options, whether or not such options or the right to convert or exchange any convertible securities issuable upon the exercise of such options are immediately exercisable, and the price per share (determined as provided in this paragraph and in Section 2(b)(iv)(C)) for which Common Stock is issuable upon the exercise of such options or upon the conversion or exchange of convertible securities issuable upon the exercise of such options is less than the Exercise Price in effect immediately prior to the time of the granting or sale of such options, then the total maximum number of shares of Common Stock issuable upon the exercise of such options or upon conversion or exchange of the total maximum amount of convertible securities issuable upon the exercise of such options shall be deemed to have been issued as of the date of granting or sale of such options at a price per share equal to the quotient obtained by dividing of (a) the total amount, if any, received or receivable by the Company as consideration for the granting, sale, or exercise of all such options (which sum shall constitute the applicable consideration received for purposes of Section 1(a)), by (b) the total maximum number of shares of Common Stock issuable upon the exercise of all such options or upon the conversion or exchange of all convertible securities issuable upon the exercise of all such options, and the number of Warrant Shares will be proportionately increased. No further adjustment of the Exercise Price or the number of Warrant Shares shall be made upon the actual issuance of Common Stock or of convertible securities upon exercise of such options or upon the actual issuance of Common Stock upon conversion or exchange of convertible securities issuable upon exercise of such options.

(B)            Issuance of Convertible Securities. If the Company shall, at any time or from time to time after the Issuance Date, grant or sell any convertible securities, whether or not the right to convert or exchange any such convertible securities is immediately exercisable, and the price per share (determined as provided in this paragraph and in Section 2(b)(iv)(C)) for which Common Stock is issuable upon the conversion or exchange of such convertible securities is less than the Exercise Price in effect immediately prior to the time of the granting or sale of such convertible securities, then the total maximum number of shares of Common Stock issuable upon conversion or exchange of the total maximum amount of such convertible securities shall be deemed to have been issued as of the date of granting or sale of such convertible securities at a price per share equal to the quotient obtained by dividing (a) the total amount, if any, received or receivable by the Company as consideration for the granting, sale, or exercise of such convertible securities (which sum shall constitute the applicable consideration received for purposes of Section 1(a)), by (b) the total maximum number of shares of Common Stock issuable upon the conversion or exchange of all such convertible securities, and the number of Warrant Shares will be proportionately increased. No further adjustment of the Exercise Price or the number of Warrant Shares shall be made upon the actual issuance of Common Stock upon conversion or exchange of such convertible securities or by reason of the issue or sale of convertible securities upon exercise of any options to purchase any such convertible securities for which adjustments of the Exercise Price have been made pursuant to the other provisions of this Section 2(b)(iv).

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(C)            Calculation of Consideration Received. If the Company shall, at any time or from time to time after the Issuance Date, issue or sell, or is deemed to have issued or sold, any shares of Common Stock, options or convertible securities: (A) for cash, the consideration received therefor shall be deemed to be the net amount received or receivable by the Company therefor; (B) for consideration other than cash, the amount of the consideration other than cash received or receivable by the Company shall be the fair market value of such consideration, except where such consideration consists of marketable securities, in which case the amount of consideration received or receivable by the Company shall be the market price (as reflected on any securities exchange, quotation system or association or similar pricing system covering such security) for such securities as of the end of business on the date of receipt of such securities; or (C) for no specifically allocated consideration in connection with an issuance or sale of other securities of the Company, together comprising one integrated transaction, the amount of the consideration therefor shall be deemed to be the fair market value of such portion of the aggregate consideration received or receivable by the Company in such transaction as is attributable to such shares of Common Stock, options or convertible securities, as the case may be, issued in such transaction. The net amount of any cash consideration and the fair market value of any consideration other than cash or marketable securities shall be determined in good faith by the Board.

(v)  Certificate as to Adjustment.

(A)            As promptly as reasonably practicable following any adjustment of the Exercise Price and/or the number of Warrant Shares, but in any event not later than 15 Business Days thereafter, the Company shall furnish to the Holder a certificate of an executive officer setting forth in reasonable detail such adjustment and the facts upon which it is based and certifying the calculation thereof. All calculations of Exercise Price under this Section 2(b) shall be made to the nearest cent or to the nearest one-hundredth of a share, as the case may be.

(B)            As promptly as reasonably practicable following the receipt by the Company of a written request by the Holder, but in any event not later than 15 Business Days thereafter, the Company shall furnish to the Holder a certificate of an executive officer certifying the Exercise Price then in effect and the number of Warrant Shares or the amount, if any, of other shares of stock, securities or assets then issuable upon exercise of the Warrant.

3.  FUNDAMENTAL TRANSACTIONS. In the event of a Fundamental Transaction, the Company shall make appropriate provision to ensure that (a) the purchaser (or its parent) shall assume this Warrant (with appropriate changes to the Exercise Price to take into account the value of the securities substituted for the Common Stock so as to preserve the intrinsic spread between the fair market value of any substituted securities and the Exercise Price), or (b) Holder will thereafter have the right to receive upon an exercise of this Warrant, in lieu of the shares of the Common Stock (or other securities, cash, assets or other property) issuable upon the exercise of this Warrant prior to such Fundamental Transaction, such securities, cash or other assets (including warrants or other purchase or subscription rights) which the Holder would have been entitled to receive on a per share basis upon the happening of such Fundamental Transaction had this Warrant been exercised immediately prior to such Fundamental Transaction (without regard to any limitations on the exercise of this Warrant); provided, however, that following any Fundamental Transaction, this Warrant shall only be exercisable via Cashless Exercise. The provisions of this Section 3 shall apply similarly and equally to successive Fundamental Transactions.

Notwithstanding the foregoing, at the request of the Holder delivered at any time commencing on the earliest to occur of (a) the public disclosure of the consummation of any Fundamental Transaction, (b) the consummation of any Fundamental Transaction and (c) the Holder first becoming aware of the consummation of any Fundamental Transaction through the date that is sixty (60) days after the public disclosure of the consummation of such Fundamental Transaction by the Company pursuant to a Current Report on Form 8-K filed with the SEC, the Company or the successor entity (as the case may be) shall purchase this Warrant from the Holder on the date of such request by paying to the Holder cash in an amount equal to the Black Scholes Value.

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4. NONCIRCUMVENTION. The Company hereby covenants and agrees that the Company will not, by amendment of its Certificate of Incorporation or Bylaws, or through any reorganization, transfer of assets, consolidation, merger, scheme of arrangement, dissolution, issue or sale of securities, or any other voluntary action, avoid or seek to avoid the observance or performance of any of the terms of this Warrant, and will at all times in good faith carry out all of the provisions of this Warrant and take all action as may be required to protect the rights of the Holder. Without limiting the generality of the foregoing, the Company (a) shall not increase the par value of any shares of Common Stock receivable upon the exercise of this Warrant above the Exercise Price then in effect, (b) shall take all such actions as may be necessary or appropriate in order that the Company may validly and legally issue fully paid and nonassessable shares of Common Stock upon the exercise of this Warrant, and (c) shall, so long as any of the March 2023 Warrants are outstanding, take all action necessary to reserve and keep available out of its authorized and unissued shares of Common Stock, solely for the purpose of effecting the exercise of the March 2023 Warrants, 100% of the number of shares of Common Stock as shall from time to time be necessary to effect the exercise of the March 2023 Warrants then outstanding (without regard to any limitations on exercise).

5. WARRANT HOLDER NOT DEEMED A STOCKHOLDER. Except as otherwise specifically provided herein, the Holder, solely in such Person’s capacity as a holder of this Warrant, shall not be entitled to vote or receive dividends or be deemed the holder of capital stock of the Company for any purpose, nor shall anything contained in this Warrant be construed to confer upon the Holder, solely in such Person’s capacity as the Holder of this Warrant, any of the rights of a stockholder of the Company or any right to vote, give or withhold consent to any corporate action (whether any reorganization, issue of stock, reclassification of stock, consolidation, merger, conveyance or otherwise), receive notice of meetings, receive dividends or subscription rights, or otherwise, prior to the issuance to the Holder of the Warrant Shares which such Person is then entitled to receive upon the due exercise of this Warrant. In addition, nothing contained in this Warrant shall be construed as imposing any liabilities on the Holder to purchase any securities (upon exercise of this Warrant or otherwise) or as a stockholder of the Company, whether such liabilities are asserted by the Company or by creditors of the Company.

6.  REISSUANCE OF WARRANTS.

(a)  Transfer of Warrant. If this Warrant is to be transferred, the Holder shall surrender this Warrant to the Warrant Agent, whereupon the Warrant Agent will forthwith issue and deliver upon the order of the Holder a new Warrant (in accordance with Section 6(d)), registered with the Company as the Holder may request, representing the right to purchase the number of Warrant Shares being transferred by the Holder and, if less than the total number of Warrant Shares then underlying this Warrant is being transferred, a new Warrant (in accordance with Section 6(d)) to the Holder representing the right to purchase the number of Warrant Shares not being transferred; provided, however, that in the event that a Warrant surrendered for transfer bears a restrictive legend, the Warrant Agent shall not cancel such Warrant and issue new Warrants in exchange thereof until the Warrant Agent has received an opinion of counsel for the Company (who may be in-house counsel) stating that such transfer may be made and indicating whether the new Warrants must also bear the restrictive legend.

(b) Lost, Stolen or Mutilated Warrant. Upon receipt by the Company of evidence reasonably satisfactory to the Company of the loss, theft, destruction or mutilation of this Warrant, and, in the case of loss, theft or destruction, of any indemnification undertaking by the Holder to the Company in customary form and, in the case of mutilation, upon surrender and cancellation of this Warrant, the Company and the Warrant Agent shall execute and deliver to the Holder a new Warrant (in accordance with Section 6(d)) representing the right to purchase the Warrant Shares then underlying this Warrant.

(c)  Exchangeable for Multiple Warrants. This Warrant is exchangeable, upon the surrender hereof by the Holder at the principal office of the Company, for a new Warrant or Warrants (in accordance with Section 6(d)) representing in the aggregate the right to purchase the number of Warrant Shares then underlying this Warrant, and each such new Warrant will represent the right to purchase such portion of such Warrant Shares as is designated by the Holder at the time of such surrender; provided, however, that no March 2023 Warrants for fractional Warrant Shares shall be given.

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(d)  Issuance of New Warrants. Whenever the Company is required to issue a new Warrant pursuant to the terms of this Warrant, such new Warrant (i) shall be of like tenor with this Warrant, (ii) shall represent, as indicated on the face of such new Warrant, the right to purchase the Warrant Shares then underlying this Warrant (or in the case of a new Warrant being issued pursuant to Section 6(a), Section 6(b) or Section 6(c), the Warrant Shares designated by the Holder which, when added to the number of shares of Common Stock underlying the other new Warrants issued in connection with such issuance, does not exceed the number of Warrant Shares then underlying this Warrant), (iii) shall have an issuance date, as indicated on the face of such new Warrant which is the same as the Issuance Date, and (iv) shall have the same rights and conditions as this Warrant.

7.  PRINCIPAL MARKET REGULATION. Unless permitted by the applicable rules and regulations of the Principal Market, the Company shall not issue any Warrant Shares if the issuance of such Warrant Shares would exceed the aggregate number of shares of Common Stock which the Company may issue upon exercise of the Warrants without breaching the Company’s obligations under the rules or regulations of the Principal Market (the number of shares which may be issued without violating such rules and regulations, the “Exchange Cap”). Notwithstanding the foregoing, such limitation shall not apply in the event that the Company (A) obtains the approval of its stockholders as required by the applicable rules of the Principal Market for issuances of shares of Common Stock in excess of such amount or (B) obtains a written opinion from outside counsel to the Company that such approval is not required, which opinion shall be reasonably satisfactory to the Holder. In the event that any Holder shall sell or otherwise transfer such Holder’s Warrant, the Exchange Cap restrictions set forth herein shall continue to apply to the Warrant and such transferee.

8.  RULE 144. At any time the Company is not subject to the reporting requirements under Section 13 or 15(d) of the 1934 Act, the Company shall, upon written request, furnish to any Holder, beneficial owner or prospective purchaser of the Warrants, the information required to be delivered pursuant to Rule 144A(d)(4) under the 1933 Act to facilitate the resale of such Warrants pursuant to Rule 144A under the 1933 Act. The Company shall take such further action as any such beneficial owner may reasonably request to the extent required from time to time to enable such beneficial Holder to sell such Warrants in accordance with Rule 144A under the 1933 Act, as such rule may be amended from time to time.

9.  NOTICES. Whenever notice is required to be given under this Warrant, unless otherwise provided herein, such notice shall be given in accordance with Section 7.3 of the Securities Purchase Agreement. The Company will give written notice to the Holder (a) promptly following any adjustment of the Exercise Price, setting forth in reasonable detail, and certifying, the calculation of such adjustment and (b) at least ten (10) days prior to the date on which the Company closes its books or takes a record (i) with respect to any dividend or distribution upon the shares of Common Stock, (ii) with respect to any grants, issuances or sales of any options, convertible securities or rights to purchase stock, warrants, securities or other property, in each case pro rata to all record holders of Common Stock, or (iii) for determining rights to vote with respect to any Fundamental Transaction, dissolution or liquidation; provided in each case that such information shall be made known to the public prior to or in conjunction with such notice being provided to the Holder.

10. AMENDMENT AND WAIVER. Except as otherwise provided herein, the provisions of this Warrant may be amended or waived and the Company may take any action herein prohibited, or omit to perform any act herein required to be performed by it, only if the Company has obtained the written consent of the Required Holders. Any amendment or waiver by the Company and the Required Holders shall be binding on the Holder of this Warrant and all holders of the March 2023 Warrants.

11. GOVERNING LAW; JURISDICTION; JURY TRIAL. This Warrant shall be governed by and construed and enforced in accordance with, and all questions concerning the construction, validity, interpretation and performance of this Warrant shall be governed by, the internal laws of the State of New York, without giving effect to any choice of law or conflict of law provision or rule (whether of the State of New York or any other jurisdictions) that would cause the application of the laws of any jurisdictions other than the State of New York. The Company hereby irrevocably submits to the exclusive jurisdiction of the state and federal courts sitting in The City of New York, Borough of Manhattan, for the adjudication of any dispute hereunder or in connection herewith or with any transaction contemplated hereby or discussed herein, and hereby irrevocably waives, and agrees not to assert in any suit, action or proceeding, any claim that it is not personally subject to the jurisdiction of any such court, that such suit, action or proceeding is brought in an inconvenient forum or that the venue of such suit, action or proceeding is improper. Nothing contained herein shall be deemed to limit in any way any right to serve process in any manner permitted by law. Nothing contained herein shall be deemed or operate to preclude the Holder from bringing suit or taking other legal action against the Company in any other jurisdiction to collect on the Company’s obligations to the Holder, to realize on any collateral or any other security for such obligations, or to enforce a judgment or other court ruling in favor of the Holder. THE COMPANY HEREBY IRREVOCABLY WAIVES ANY RIGHT IT MAY HAVE, AND AGREES NOT TO REQUEST, A JURY TRIAL FOR THE ADJUDICATION OF ANY DISPUTE HEREUNDER OR IN CONNECTION WITH OR ARISING OUT OF THIS WARRANT OR ANY TRANSACTION CONTEMPLATED HEREBY.

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12. CONSTRUCTION; HEADINGS. This Warrant shall be deemed to be jointly drafted by the Company and all of the Purchasers and shall not be construed against any Person as the drafter hereof. The headings of this Warrant are for convenience of reference and shall not form part of, or affect the interpretation of, this Warrant.

13. DISPUTE RESOLUTION. In the case of a dispute as to the determination of the Exercise Price, the Black Scholes Value or the arithmetic calculation of the Warrant Shares, the Company shall submit the disputed determinations or arithmetic calculations via electronic mail within three (3) Business Days of receipt of the Exercise Notice giving rise to such dispute, as the case may be, to the Holder. If the Holder and the Company are unable to agree upon such determination or calculation of the Exercise Price, the Black Scholes Value or the Warrant Shares within three (3) Business Days of such disputed determination or arithmetic calculation being submitted to the Holder, then the Company shall, within three (3) Business Days submit via electronic mail (a) the disputed determination of the Exercise Price or the Black Scholes Value, as applicable, together with the Company’s and Holder’s respective calculations, to an independent, reputable investment bank or financial services firm selected by the Holder and approved by the Company, such approval not to be unreasonably withheld, conditioned, or delayed, or (b) the disputed arithmetic calculation of the Warrant Shares, together with the Company’s and Holder’s respective calculations, to an independent, outside accountant, selected by the Holder and approved by the Company, such approval not to be unreasonably withheld, conditioned, or delayed. The Company shall cause the investment bank, financial services firm or accountant, as the case may be, to perform the determinations or calculations and notify the Company and the Holder of the results no later than five (5) Business Days from the time it receives the disputed determinations or calculations. Such investment bank’s, financial services firm’s or accountant’s determination or calculation, as the case may be, shall be binding upon all parties absent demonstrable error. The costs of such investment bank, financial services firm or accountant shall be allocated by such firm between the Company and the Holder proportionally based on such firm’s determination or calculation and the Company’s and Holder’s respective calculations submitted to such firm.

14. REMEDIES, OTHER OBLIGATIONS, BREACHES AND INJUNCTIVE RELIEF. The remedies provided in this Warrant shall be cumulative and in addition to all other remedies available under this Warrant and the other Transaction Documents (as defined in the Securities Purchase Agreement), at law or in equity (including a decree of specific performance and/or other injunctive relief), and nothing herein shall limit the right of the Holder to pursue actual damages for any failure by the Company to comply with the terms of this Warrant. The Company acknowledges that a breach by it of its obligations hereunder will cause irreparable harm to the Holder and that the remedy at law for any such breach may be inadequate. The Company therefore agrees that, in the event of any such breach or threatened breach, the holder of this Warrant shall be entitled, in addition to all other available remedies, to seek an injunction restraining any breach, without the necessity of showing economic loss and without any bond or other security being required.

15. TRANSFER. This Warrant and the Warrant Shares may be offered for sale, sold, transferred, pledged or assigned without the consent of the Company, except as may otherwise be required by Section 4.1 of the Securities Purchase Agreement.

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16. SEVERABILITY. If any provision of this Warrant is prohibited by law or otherwise determined to be invalid or unenforceable by a court of competent jurisdiction, the provision that would otherwise be prohibited, invalid or unenforceable shall be deemed amended to apply to the broadest extent that it would be valid and enforceable, and the invalidity or unenforceability of such provision shall not affect the validity of the remaining provisions of this Warrant so long as this Warrant as so modified continues to express, without material change, the original intentions of the parties as to the subject matter hereof and the prohibited nature, invalidity or unenforceability of the provision(s) in question does not substantially impair the respective expectations or reciprocal obligations of the parties or the practical realization of the benefits that would otherwise be conferred upon the parties. The parties will endeavor in good faith negotiations to replace the prohibited, invalid or unenforceable provision(s) with a valid provision(s), the effect of which comes as close as possible to that of the prohibited, invalid or unenforceable provision(s).

17. DISCLOSURE. Upon delivery by the Company to the Holder of any notice required to be given in accordance with the terms of this Warrant, unless the Company has in good faith determined that the matters relating to such notice do not constitute material, nonpublic information relating to the Company or its Subsidiaries, the Company shall contemporaneously with any such delivery publicly disclose such material, nonpublic information on a Current Report on Form 8-K or otherwise. In the event that the Company believes that any notice required to be delivered by the Company in accordance with the terms of this Warrant contains material, nonpublic information relating to the Company or its Subsidiaries, the Company so shall indicate to the Holder contemporaneously with delivery of such notice, and in the absence of any such indication, the Holder shall be allowed to presume that all matters relating to such notice do not constitute material, nonpublic information relating to the Company or its Subsidiaries.

18. CERTAIN DEFINITIONS. For purposes of this Warrant, the following terms shall have the following meanings:

(a) “1933 Act” means the Securities Act of 1933, as amended.

(b) “Affiliate” shall have the meaning ascribed to such term in Rule 405 of the 1933 Act.

(c) “Attribution Parties” means, collectively, the following Persons and entities: (i) any investment vehicle, including, any funds, feeder funds or managed accounts, currently, or from time to time after the Issuance Date, directly or indirectly managed or advised by the Holder’s investment manager or any of its Affiliates or principals, (ii) any direct or indirect Affiliates of the Holder or any of the foregoing, (iii) any Person acting or who could be deemed to be acting as a Group together with the Holder or any of the foregoing and (iv) any other Persons whose beneficial ownership of the Common Stock would or could be aggregated with the Holder’s and the other Attribution Parties for purposes of Section 13(d) of the 1934 Act. For clarity, the purpose of the foregoing is to subject collectively the Holder and all other Attribution Parties to the Maximum Percentage.

(d) “Black Scholes Value” means the value of the unexercised portion of this Warrant remaining on the date of the Holder’s request pursuant to Section 3, which value is calculated using the Black Scholes Option Pricing Model obtained from the “OV” function on Bloomberg utilizing (i) an underlying price per share equal to the greater of (1) the highest closing sale price of the Common Stock during the period beginning on the Trading Day immediately preceding the announcement of the applicable Fundamental Transaction (or the consummation of the applicable Fundamental Transaction, if earlier) and ending on the Trading Day of the Holder’s request pursuant to Section 3 and (2) the sum of the price per share being offered in cash in the applicable Fundamental Transaction (if any) plus the value of the non-cash consideration being offered in the applicable Fundamental Transaction (if any), (ii) a strike price equal to the Exercise Price in effect on the date of the Holder’s request pursuant to Section 3, (iii) a risk-free interest rate corresponding to the U.S. Treasury rate for a period equal to the greater of (1) the remaining term of this Warrant as of the date of the Holder’s request pursuant to Section 3 and (2) the remaining term of this Warrant as of the date of consummation of the applicable Fundamental Transaction or as of the date of the Holder’s request pursuant to Section 3 if such request is prior to the date of the consummation of the applicable Fundamental Transaction, (iv) a zero cost of borrow and (v) an expected volatility equal to the greater of 100% and the 30 day volatility obtained from the “HVT” function on Bloomberg (determined utilizing a 365 day annualization factor) as of the Trading Day immediately following the earliest to occur of (A) the public disclosure of the applicable Fundamental Transaction and (B) the date of the Holder’s request pursuant to Section 3.

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(e) “Bloomberg” means Bloomberg Financial Markets.

(f) “Business Day” means any day other than Saturday, Sunday or other day on which commercial banks in The City of New York, New York are authorized or required by law to remain closed; provided, however, for clarification, commercial banks shall not be deemed to be authorized or required by law to remain closed due to “stay at home”, “shelter-in-place”, “non-essential employee” or any other similar orders or restrictions or the closure of any physical branch locations at the direction of any governmental authority so long as the electronic funds transfer systems (including for wire transfers) of commercial banks in The City of New York, New York generally are open for use by customers on such day.

(g) “Common Stock” means (i) the Company’s shares of common stock, par value $0.0001 per share, and (ii) any capital stock into which such Common Stock shall have been changed or any capital stock resulting from a reclassification, reorganization or recapitalization of such Common Stock.

(h) “Expiration Date” means the date that is forty-eight (48) months after the Issuance Date or, if such date falls on a day other than a Business Day or on which trading does not take place on the Principal Market (a “Holiday”), the next day that is not a Holiday.

(i) “Fundamental Transaction” means (A) that the Company shall, directly or indirectly, including through Subsidiaries, Affiliates or otherwise, in one or more related transactions, (i) consolidate or merge with or into (whether or not the Company is the surviving corporation) another Subject Entity, or (ii) sell, assign, transfer, convey or otherwise dispose of all or substantially all of the properties or assets of the Company, or (iii) make, or allow one or more Subject Entities to make, or allow the Company to be subject to or have its Common Stock be subject to or party to one or more Subject Entities making, a purchase, tender or exchange offer that is accepted by the holders of at least either (x) 50% of the outstanding shares of Common Stock, (y) 50% of the outstanding shares of Common Stock calculated as if any shares of Common Stock held by all Subject Entities making or party to, or Affiliated with any Subject Entities making or party to, such purchase, tender or exchange offer were not outstanding; or (z) such number of shares of Common Stock such that all Subject Entities making or party to, or Affiliated with any Subject Entity making or party to, such purchase, tender or exchange offer, become collectively the beneficial owners (as defined in Rule 13d-3 under the 1934 Act) of at least 50% of the outstanding shares of Common Stock, or (iv) consummate a stock purchase agreement or other business combination (including, without limitation, a reorganization, recapitalization, spin-off or scheme of arrangement) with one or more Subject Entities whereby such Subject Entities, individually or in the aggregate, acquire, either (x) at least 50% of the outstanding shares of Common Stock, (y) at least 50% of the outstanding shares of Common Stock calculated as if any shares of Common Stock held by all the Subject Entities making or party to, or Affiliated with any Subject Entity making or party to, such stock purchase agreement or other business combination were not outstanding; or (z) such number of shares of Common Stock such that the Subject Entities become collectively the beneficial owners (as defined in Rule 13d-3 under the 1934 Act) of at least 50% of the outstanding shares of Common Stock, or (v) reorganize, recapitalize or reclassify its Common Stock, (B) that the Company shall, directly or indirectly, including through Subsidiaries, Affiliates or otherwise, in one or more related transactions, allow any Subject Entity individually or the Subject Entities in the aggregate to be or become the “beneficial owner” (as defined in Rule 13d-3 under the 1934 Act), directly or indirectly, whether through acquisition, purchase, assignment, conveyance, tender, tender offer, exchange, reduction in outstanding shares of Common Stock, merger, consolidation, business combination, reorganization, recapitalization, spin-off, scheme of arrangement, reorganization, recapitalization or reclassification or otherwise in any manner whatsoever, of either (x) at least 50% of the aggregate ordinary voting power represented by issued and outstanding Common Stock, (y) at least 50% of the aggregate ordinary voting power represented by issued and outstanding Common Stock not held by all such Subject Entities as of the Subscription Date calculated as if any shares of Common Stock held by all such Subject Entities were not outstanding, or (z) a percentage of the aggregate ordinary voting power represented by issued and outstanding shares of Common Stock or other equity securities of the Company sufficient to allow such Subject Entities to effect a statutory short form merger or other transaction requiring other stockholders of the Company to surrender their shares of Common Stock without approval of the stockholders of the Company or (C) directly or indirectly, including through Subsidiaries, Affiliates or otherwise, in one or more related transactions, the issuance of or the entering into any other instrument or transaction structured in a manner to circumvent, or that circumvents, the intent of this definition in which case this definition shall be construed and implemented in a manner otherwise than in strict conformity with the terms of this definition to the extent necessary to correct this definition or any portion of this definition which may be defective or inconsistent with the intended treatment of such instrument or transaction.

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(j) “Group” means a “group” as that term is used in Section 13(d) of the 1934 Act and as defined in Rule 13d-5 thereunder.

(k) “Person” means an individual, a limited liability company, a partnership, a joint venture, a corporation, a trust, an unincorporated organization, any other entity and a government or any department or agency thereof.

(l) “Principal Market” means The Nasdaq Global Select Market.

(m) “Required Holders” means the holders of the March 2023 Warrants representing at least a majority of the shares of Common Stock underlying the March 2023 Warrants then outstanding.

(n) “Standard Settlement Period” means the standard settlement period, expressed in a number of Trading Days, on the principal securities exchange or securities market on which the Common Stock is then traded as in effect on the date of delivery of the applicable Exercise Notice.

(o) “Subject Entity” means any Person, Persons or Group or any Affiliate or associate of any such Person, Persons or Group.

(p) “Subsidiary” has the meaning as set forth in the Securities Purchase Agreement.

(q) “Trading Day” means any day on which the Common Stock is traded on the Principal Market, or, if the Principal Market is not the principal trading market for the Common Stock on such day, then on the principal securities exchange or securities market on which the Common Stock is then traded.

(r) “Weighted Average Price” means, for any security as of any date, the dollar volume-weighted average price for such security on the Principal Market during the period beginning at 9:30:01 a.m., New York time (or such other time as the Principal Market publicly announces is the official open of trading), and ending at 4:00:00 p.m., New York time (or such other time as the Principal Market publicly announces is the official close of trading), as reported by Bloomberg through its “Volume at Price” function or, if the foregoing does not apply, the dollar volume-weighted average price of such security in the over-the-counter market on the electronic bulletin board for such security during the period beginning at 9:30:01 a.m., New York time (or such other time as such market publicly announces is the official open of trading), and ending at 4:00:00 p.m., New York time (or such other time as such market publicly announces is the official close of trading), as reported by Bloomberg, or, if no dollar volume-weighted average price is reported for such security by Bloomberg for such hours, the average of the highest closing bid price and the lowest closing ask price of any of the market makers for such security as reported in the OTC Link or “pink sheets” by OTC Markets Group Inc. (formerly Pink OTC Markets Inc.). If the Weighted Average Price cannot be calculated for a security on a particular date on any of the foregoing bases, the Weighted Average Price of such security on such date shall be the fair market value as mutually determined by the Company and the Holder. If the Company and the Holder are unable to agree upon the fair market value of such security, then such dispute shall be resolved pursuant to Section 11 with the term “Weighted Average Price” being substituted for the term “Exercise Price.” All such determinations shall be appropriately adjusted for any stock dividend, stock split, stock combination, reclassification or other similar transaction during the applicable calculation period.

[Signature Page Follows]

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IN WITNESS WHEREOF, the Company has caused this Warrant to be duly executed as of the Issuance Date set out above in accordance with the terms of the Warrant.

RIBBON COMMUNICATIONS INC.
By:
Name:
Title:

15

EXHIBIT A

EXERCISE NOTICE

TO BE EXECUTED BY THE REGISTERED HOLDER TO EXERCISE THIS

WARRANT TO PURCHASE COMMON STOCK

RIBBON COMMUNICATIONS INC.

The undersigned holder hereby exercises the right to purchase _________________ of the shares of Common Stock (“Warrant Shares”) of Ribbon Communications Inc., a Delaware corporation (the “Company”), evidenced by the attached Warrant to Purchase Common Stock (the “Warrant”). Capitalized terms used herein and not otherwise defined shall have the respective meanings set forth in the Warrant.

1. Form of Exercise Price. The Holder intends that payment of the Exercise Price shall be made as:

____________ a “Cash Exercise” with respect to _________________ Warrant Shares; and/or____________ a “Cashless Exercise” with respect to _______________ Warrant Shares, resulting in a delivery                obligation of the Company to the Holder of __________ shares of Common Stock representing the               applicable Net Number.

2. Payment of Exercise Price. In the event that the holder has elected a Cash Exercise with respect to some or all of the Warrant Shares to be issued pursuant hereto, the holder shall pay the Aggregate Exercise Price in the sum of $___________________ to the Warrant Agent in accordance with the terms of the Warrant.

3. Delivery of Warrant Shares. The Warrant Agent shall deliver to the holder __________ Warrant Shares in accordance with the terms of the Warrant as follows, subject to Section 1(a) of the Warrant.

____________ Warrant Shares have been sold pursuant to an effective resale registration statement and should be credited to the Holder’s or its designee’s balance account with DTC through its Deposit / Withdrawal At Custodian system pursuant to the information that accompanies this notice; and/or

____________ Warrant Shares acquired via Cashless Exercise have been sold pursuant to Rule 144 and the Holder has delivered to the Company representations from the Holder and the Holder’s broker indicating such and such Warrant Shares should be credited to the Holder’s or its designee’s balance account with DTC through its Deposit / Withdrawal At Custodian system pursuant to the information that accompanies this notice; and/or

____________ Warrant Shares represented by a certificate or evidence of book entry should be sent to the Holder or its designee at the address below.

Date: _______ __, ________

Name of Registered Holder
By:
	Name:
	Title:

Address for certificate or evidence of book entry delivery (if applicable):

DTC Information (if applicable):

ACKNOWLEDGMENT

The Company hereby acknowledges this Exercise Notice and hereby directs American Stock Transfer & Trust Company, LLC to issue the above indicated number of shares of Common Stock.

RIBBON COMMUNICATIONS INC.
By:
Name:
Title: