THIRD AMENDMENT TO SECOND AMENDED AND RESTATED REVOLVING CREDIT PROMISSORY NOTE (LIBOR/PRIME) (Avistar Communications Corporation)

(Avistar Communications Corporation)

Third Amendment dated as of December 20, 2010  (this “Amendment”) to that certain Second Amended and Restated Revolving Credit Promissory Note dated as of December 22, 2009, as amended, by Avistar Communications Corporation, a Delaware corporation (the “Borrower”), to the order of JPMorgan Chase Bank, N.A. (the “Bank”), in the maximum principal amount of $7,000,000 (the “Promissory Note”).

For value received, the parties hereto hereby agree as follows:

1.	Initially capitalized terms used herein without definition have the meanings given them in the Promissory Note.

2.	The first unnumbered paragraph of the Note is hereby amended by deleting therefrom the date “December 22, 2010” and inserting in lieu thereof the date “December 22, 2011.”

3.	The definition of Maximum Facility Amount in Section 1 of the Promissory Note is hereby amended and restated as follows:

“Maximum Facility Amount” shall mean the lesser of (i) Eight Million Dollars ($8,000,000) and (ii) the value assigned by the Bank from time to time, in its sole reasonable discretion, to the collateral, if any, pledged and collaterally assigned to the Bank, and in which the Bank has a first-priority security interest and against which the Bank has a right of setoff, as security for the Borrower’s payment of its obligations under this Note.

4.	The Borrowing Notice is hereby amended and restated as set forth in Exhibit A hereto.

5.	This Amendment shall become effective on the later of August 16, 2010 and the first date by which all of the following shall have occurred:

a.	The Borrower’s payment of $2,500.00 to the Bank’s counsel in respect of services rendered to the Bank in connection with the Borrower;

b.	The Bank’s receipt of a reaffirmation of the Guaranty substantially in the form attached hereto as Exhibit B, duly executed by each Guarantor;

c.	The Bank’s receipt of a Secretary’s Certificate substantially in the form attached hereto as Exhibit C, duly executed by the Secretary of the Borrower; and

d.	The Bank’s receipt of a Form U-1 substantially in the form attached hereto as Exhibit D, duly executed by the Secretary of the Borrower

6.	The Promissory Note, as amended by this Amendment, remains in full force and effect.

7.	This Amendment shall be governed by and construed in accordance with the laws of the State of New York, without regard to conflicts of laws principles.

8.	This Amendment may be executed in any number of counterparts and by different parties hereto in separate counterparts, each of which shall be deemed to be an original, but all of which taken together shall constitute one in the same instrument.

IN WITNESS WHEREOF, the parties have caused this Amendment to be duly executed and delivered as of the date first above written.

JPMorgan Chase Bank, N.A.

By:            /s/ Nancy A. Sheppard

            Nancy A. Sheppard

            Managing Director

By:           /s/ Robert F. Kirk

Name: Robert F. Kirk

Title: Chief Executive Officer

By:           /s/ Elias MurrayMetzger

Name: Elias MurrayMetzger

Title: Chief Financial Officer, Chief Administrative Officer & Corporate Secretary

State of _________                                )

) ss.:

County of ________

)

On the ____ day of December in the year 2010, before me, the undersigned, personally appeared ______________________, personally known to me or proved to me on the basis of satisfactory evidence to be the individual whose name is subscribed to the within instrument and acknowledged to me that he/she executed the same in his/her capacity, and that by his/her signature on the instrument, the individual, or the person upon behalf of which the individual acted, executed the instrument.

____________________________________

Notary Public

State of _________

)

) ss.:

County of ________

)

On the ____ day of December in the year 2010, before me, the undersigned, personally appeared ______________________, personally known to me or proved to me on the basis of satisfactory evidence to be the individual whose name is subscribed to the within instrument and acknowledged to me that he/she executed the same in his/her capacity, and that by his/her signature on the instrument, the individual, or the person upon behalf of which the individual acted, executed the instrument.

____________________________________

Notary Public

EXHIBIT A

Form of Borrowing Notice

Date:  __________________

JPMorgan Chase Bank, N.A.

Attn:  Bill Raines

1111 Fannin Street

14th Floor

Houston, Texas 77002

Telecopier:   ###-###-####

Telephone:   ###-###-####

Gentlemen:

The undersigned hereby requests a Loan (the “Requested Loan”) under the Second Amended and Restated Revolving Credit Promissory Note (Libor/Prime) dated as of December 22, 2009 by the undersigned to your order with a maximum principal amount of $8,000,000 (as amended, the “Note”).  Initial capitalized terms used herein without definition have the meanings given such terms in the Note.

The undersigned is faxing this Borrowing Notice to you (i) if the Requested Loan is a Prime Loan, by 12:00 noon (NYC time) on the “Disbursement Date” (as specified below) and  (ii) if the Requested Loan is a Libor Loan, by 12:00 noon (NYC time) at least three Banking Days prior to the Disbursement Date.  The undersigned will promptly mail the signed original of this Borrowing Notice to you.

Please book the Requested Loan as follows:

Disbursement Date:                                       _________­­________ ___, 20___

 

Amount:                                       $                Type:           ____ LIBOR                                ____ Prime

 

LIBOR Period (if applicable):                                                      ____ 1 month    ____ 2 months    ____ 3 months

 

Disbursement Instructions:                                                      

 

The proceeds of the Requested Loan shall be used for working capital purposes.  Immediately upon funding of the Requested Loan, the aggregate principal amount of all Loans then outstanding will be $__________________.

 

In witness whereof, the undersigned has executed this Borrowing Notice as of the date first written above.

By:           

Name:           

Title:           

By:           

Name:           

Title:           

EXHIBIT B

Reaffirmation of Guaranty

EXHIBIT C

Secretary’s Certificate

EXHIBIT D

Form U-1