EXHIBIT 10.42

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

The rest of this page is intentionally blank.

Note.Second Amended and Restated.005.Amnd-3.002.doc
UCN 006754857000
Facility ID 198245263
 
 

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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

Avistar Communications Corporation

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

UCN 006754857000 [Signature Page of Third Amendment to
Facility ID 198245263 Second Amended and Restated Revolving Credit Promissory
Note]
 
 

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EXHIBIT A
Form of Borrowing Notice

Date:  __________________

JPMorgan Chase Bank, N.A.
Attn:  Bill Raines
1111 Fannin Street
14th Floor
Houston, Texas 77002
Telecopier:  (800) 576-3217
Telephone:  (713) 750-3217

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.

Avistar Communications Corporation

By:           
Name:           
Title:           

By:           
Name:           
Title:           

 
Note.Second Amended and Restated.005.Amnd-3.002.doc
 
 

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EXHIBIT B
Reaffirmation of Guaranty

 
Note.Second Amended and Restated.005.Amnd-3.002.doc
 
 

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EXHIBIT C
Secretary’s Certificate

 
Note.Second Amended and Restated.005.Amnd-3.002.doc
 
 

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EXHIBIT D
Form U-1

 
Note.Second Amended and Restated.005.Amnd-3.002.doc
 
 

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