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   &lt;!-- Begin Block Tagged Note 11 - us-gaap:ScheduleOfLineOfCreditFacilitiesTextBlock--&gt;
   &lt;div style="font-family: 'Times New Roman',Times,serif"&gt;
   &lt;div align="left" style="font-size: 10pt; margin-top: 12pt"&gt;&lt;b&gt;Note 11 &amp;#8212; Lines of Credit&lt;/b&gt;
   &lt;/div&gt;
   &lt;div align="left" style="font-size: 10pt; margin-top: 6pt"&gt;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;In October&amp;#160;2008, Tekelec, together with our Belgian subsidiary, Tekelec International, SPRL,
   entered into a credit facility (the &amp;#8220;Credit Facility&amp;#8221;) with Wachovia Bank, National Association
   (&amp;#8220;Wachovia Bank&amp;#8221;). The Credit Facility remained in place upon Wells Fargo Bank, National
   Association&amp;#8217;s (&amp;#8220;Wells Fargo&amp;#8221;) acquisition of Wachovia Bank. Pursuant to the Credit Facility, (i)
   Tekelec and Tekelec International, SPRL (the &amp;#8220;Borrowers&amp;#8221;) could borrow up to an aggregate principal
   amount of $50.0&amp;#160;million for general corporate purposes under a three-year revolving credit
   facility, (ii)&amp;#160;the Borrowers could borrow up to $10.0&amp;#160;million of such amount under a swingline
   subfacility, and (iii)&amp;#160;Tekelec could utilize up to $10.0&amp;#160;million under a separate one-year letter
   of credit facility. The face value of any letters of credit issued under the facility is 100%
   secured by cash. As of December&amp;#160;31, 2010, there were no borrowings outstanding under the Credit
   Facility. As of December&amp;#160;31, 2010, there were approximately $2.6&amp;#160;million of borrowings outstanding
   under the letter of credit facility, all of which were fully collateralized by us.
   &lt;/div&gt;
   &lt;div align="left" style="font-size: 10pt; margin-top: 6pt"&gt;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;The Credit Facility, other than obligations under the letters of credit, is unsecured except
   for our pledge of 65% of the outstanding stock of Tekelec International, SPRL and of two other
   Tekelec subsidiaries, Tekelec do Brasil Ltda. and Tekelec France SAS.
   &lt;/div&gt;
   &lt;div align="left" style="font-size: 10pt; margin-top: 6pt"&gt;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;Borrowings under the Credit Facility by Tekelec for revolving loans in U.S. Dollars bear
   interest, at Tekelec&amp;#8217;s election, at the base rate, calculated at the higher of the prime rate and
   the federal funds rate plus one half of 1%, or at Wells Fargo&amp;#8217;s LIBOR rate plus the applicable
   margin for the one, two or three month interest period selected by Tekelec. Borrowings by Tekelec
   International, SPRL for revolving loans in Euros, bear interest at Wells Fargo&amp;#8217;s LIBOR rate plus
   the applicable margin for the one, two or three month interest period selected by Tekelec
   International, SPRL. Tekelec was also required to pay certain fees, including (i)&amp;#160;a commitment fee
   equal to 0.50% of the aggregate revolving credit commitment, which was paid at the closing, (ii)&amp;#160;an
   undrawn fee (currently 0.25% per annum) of the average daily unused portion of the revolving credit
   commitment, payable quarterly in arrears, and (iii)&amp;#160;fees in connection with letters of credit,
   including fees of 0.50% per year on the face amounts thereof.
   &lt;/div&gt;
   &lt;div align="left" style="font-size: 10pt; margin-top: 6pt"&gt;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;The Credit Facility imposes certain financial covenants and other restrictions. These include,
   without limitation, requirements that we deliver certain financial statements and information,
   maintain certain insurance coverage and comply with certain financial covenants. The Credit
   Facility also restricts us from taking certain actions without the consent of Wells Fargo,
   including without limitation restrictions on incurring other senior indebtedness, making certain
   investments or dividends or distributions, entering into certain mergers, consolidations or
   acquisitions, altering in any material respect the general nature of our business, creating
   security interests in or liens on assets, and engaging in certain transactions with affiliates or
   taking actions that impair the security interests granted under the Credit Facility. Amortization
   of deferred financing costs associated with the Credit Facility was approximately $213,000 for each
   of the years ended December&amp;#160;31, 2010 and December&amp;#160;31, 2009, and approximately $53,000 for the year
   ended December&amp;#160;31, 2008, and is recorded in interest expense.
   &lt;/div&gt;
   &lt;div align="left" style="font-size: 10pt; margin-top: 6pt"&gt;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;As more fully discussed in Note 18 &amp;#8220;Subsequent Events&amp;#8221; to these Consolidated Financial
   Statements, on January&amp;#160;13, 2011, we entered into an Amended and Restated Credit Agreement with
   Wells Fargo. This agreement amended and restated in its entirety the October&amp;#160;2, 2008 Credit
   Agreement, to, among other changes, increase the aggregate amount of the revolving credit facility
   from $50.0&amp;#160;million to $75.0&amp;#160;million and extend the maturity date of the revolving credit facility
   and the related swingline facility from October&amp;#160;2, 2012 to January&amp;#160;12, 2016. Please refer to Note
   18 for an additional description of the terms and conditions of this Amended and Restated Credit
   Agreement.
   &lt;/div&gt;
   &lt;!-- Folio --&gt;
   &lt;!-- /Folio --&gt;
   &lt;/div&gt;
   &lt;!-- PAGEBREAK --&gt;
   &lt;div style="font-family: 'Times New Roman',Times,serif"&gt;
   &lt;/div&gt;
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 -Publisher SEC
 -Name Regulation S-X (SX)
 -Number 210
 -Section 08
 -Paragraph f
 -Article 4

Reference 2: http://www.xbrl.org/2003/role/presentationRef
 -Publisher SEC
 -Name Regulation S-X (SX)
 -Number 210
 -Section 02
 -Paragraph 19, 22
 -Article 5

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