Exhibit (a)(1)(iii)

NOTICE OF GUARANTEED DELIVERY

To Tender Shares of Common Stock

of

WEBEX COMMUNICATIONS, INC.

Pursuant to the Offer to Purchase

Dated March 27, 2007

of

WONDER ACQUISITION CORP.

a wholly-owned subsidiary

of

CISCO SYSTEMS, INC.

This form, or a substantially equivalent form, must be used to accept the Offer (as defined below) if the certificates for shares of common stock, par value $0.001 per share, of WebEx Communications, Inc. and any other documents required by the Letter of Transmittal cannot be delivered to the Depositary by the expiration of the Offer. Such form may be delivered by hand, or transmitted by telex, facsimile transmission, or mail to the Depositary. See Section 3 of the Offer to Purchase.

The Depositary for the Offer to Purchase is:

By Mail	By Facsimile Transmission	By Hand or Overnight Courier:
Computershare Shareholder Services, Inc.	For Eligible Institutions Only:	Computershare Shareholder Services, Inc.
P.O. Box 859208	(781) 380-3388	161 Bay State Drive
Braintree, MA 02185	For Confirmation Only Telephone:	Braintree, MA 02184
Attention: Corporate Actions Department	(781) 930-4900	Attention: Corporate Actions Department

DELIVERY OF THIS NOTICE OF GUARANTEED DELIVERY TO AN ADDRESS OTHER THAN AS SET FORTH ABOVE, OR TRANSMISSION OF INSTRUCTIONS VIA A FACSIMILE NUMBER OTHER THAN AS SET FORTH ABOVE, WILL NOT CONSTITUTE A VALID DELIVERY.

This Notice of Guaranteed Delivery is not to be used to guarantee signatures. If a signature on a Letter of Transmittal is required to be guaranteed by an Eligible Institution under the instructions thereto, such signature guarantee must appear in the applicable space provided in the signature box on the Letter of Transmittal.

¨ CHECK HERE IF SHARE CERTIFICATES HAVE BEEN MUTILATED, LOST, STOLEN OR DESTROYED. SEE INSTRUCTION 9 OF THE LETTER OF TRANSMITTAL.

Ladies and Gentlemen: The undersigned hereby tenders to Wonder Acquisition Corp., a Delaware corporation (the “Purchaser”) and wholly-owned subsidiary of Cisco Systems, Inc., a California corporation (“Cisco”), upon the terms and subject to the conditions set forth in the Offer to Purchase dated March 27, 2007 (which, together with any amendments and supplements thereto, collectively constitute the “Offer to Purchase”), and the related Letter of Transmittal (which, together with any amendments and supplements thereto, collectively constitute the “Offer”), receipt of which is hereby acknowledged,             shares of common stock, par value $0.001 per share (the “Shares”), of WebEx Communications, Inc., a Delaware corporation (“WebEx”), pursuant to the guaranteed delivery procedure set forth in Section 3 of the Offer to Purchase. The Offer is being made in connection with the Agreement and Plan of Merger, dated March 15, 2007, by and among the Purchaser, Cisco and WebEx.

Certificate Numbers (if available)	SIGN BELOW
	Signature(s)
	(Name(s)) (Please Print)
	(Addresses)
	(Zip Code)
If delivery will be by book-entry transfer: Name of Tendering Institution	(Area Code and Telephone Number)
Account Number

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GUARANTEE (Not to be used for signature guarantee)

The undersigned, a firm which is a bank, broker, dealer, credit union, savings association or other entity which is a member in good standing of a recognized Medallion Program approved by The Securities Transfer Association Inc., including the Securities Transfer Agents Medallion Program (STAMP), the Stock Exchange Medallion Program (SEMP) and the New York Stock Exchange, Inc. Medallion Signature Program (MSP) or any other “eligible guarantor institution” (as such term is defined in Rule 17Ad-15 under the Securities Exchange Act of 1934, as amended), guarantees (i) that the above named person(s) “own(s)” the Shares tendered hereby within the meaning of Rule 14e-4 under the Securities Exchange Act of 1934, as amended, (ii) that such tender of Shares complies with Rule 14e-4 and (iii) to deliver to the Depositary the Shares tendered hereby, together with a properly completed and duly executed Letter(s) of Transmittal and certificates for the Shares to be tendered or an Agent’s Message (as defined in the Offer to Purchase) in the case of a book-entry delivery, and any other required documents, all within three New York Stock Exchange trading days of the date hereof.

(Name of Firm)

(Address)

(Zip Code)

(Authorized Signature)

(Name)

(Area Code and Telephone Number)

Dated                     , 2007.

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