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Exh. 10.9.5

FOURTH AMENDMENT
TO
LOAN AND SECURITY AGREEMENT

        This Fourth Amendment to the Loan and Security Agreement (the
"Amendment") is entered into as of February 27, 2004, by and between COMERICA
BANK ("Bank") and AVISTAR COMMUNICATIONS CORPORATION ("Borrower").

RECITALS

        Borrower and Bank are parties to that certain Loan and Security
Agreement dated as of February 27, 2002, (as amended from time to time,
including without limitation that certain First Amendment to Loan and Security
Agreement dated December 16, 2002, Second Amendment to Loan and Security
Agreement dated March 10, 2003, and Third Amendment to Loan and Security
Agreement dated July 2, 2003, together with any related agreements, the
"Agreement"). Hereinafter, all indebtedness owing by Borrower to Bank shall be
referred to as the "Indebtedness." The parties desire to amend the Agreement in
accordance with the terms of this Amendment.

        NOW, THEREFORE, for good and valuable consideration, the receipt and
sufficiency of which are hereby acknowledged, the parties agree as follows:

AGREEMENT

I.Incorporation by Reference. The Recitals and the documents referred to therein
are incorporated herein by this reference. Except as otherwise noted, the terms
not defined herein shall have the meaning set forth in the Agreement.

II.Amendment to the Agreement. Subject to the satisfaction of the conditions
precedent as set forth in Article IV hereof, the Agreement is hereby amended as
set forth below.

A.The definition of "Revolving Line" in Section 1.1 of the Agreement is hereby
amended and restated in its entirety to read as follows:

"Revolving Line" means a credit extension of up to Three Million Five Hundred
Thousand Dollars ($3,500,000).

B.The definition of "Revolving Maturity Date" in Section 1.1 of the Agreement is
hereby amended and restated in its entirety to read as follows:

""Revolving Maturity Date" means February 27, 2005."

C.Section 2.5(c) of the Agreement is hereby amended by deleting the reference to
"$3,500,000" contained therein and inserting "$1,500,000" in lieu thereof.

D.Section 6.3 is hereby amended by adding the following sentence to the end
thereof:

"Notwithstanding anything to the contrary contained in this Section 6.3, during
any fiscal quarter in which no Advances are outstanding, reports under this
Section 6.3 which are required to be delivered to Bank on a monthly basis shall
be due instead on a quarterly basis, such reports to be delivered as soon as
available, but in any event within thirty (30) days after the end of each fiscal
quarter."

E.The first sentence of Section 6.8 of the Agreement is hereby amended and
restated in its entirety to read as follows:

"Borrower shall maintain, measured as of the last day of each calendar month, on
a consolidated basis, a ratio of Adjusted Quick Assets to Current Liabilities
plus, to the extent not already included therein, all Indebtedness (including
without limitation any Contingent

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Obligations) owing from Borrower to Bank, less deferred maintenance contract
revenue, of at least .75 to 1.00."

F.Exhibit D to the Agreement is hereby amended and replaced in its entirety by
Exhibit D attached hereto.

III.Legal Effect.

A.The Agreement is hereby amended wherever necessary to reflect the changes
described above.

B.Borrower agrees that it has no defenses against the obligations to pay any
amounts under the Indebtedness.

C.Borrower understands and agrees that in modifying the existing Indebtedness,
Bank is relying upon Borrower's representations, warranties, and agreements, as
set forth in the Agreement. Except as expressly modified pursuant to this
Amendment, the terms of the Agreement remain unchanged, and in full force and
effect. Bank's agreement to modifications to the existing Indebtedness pursuant
to this Amendment in no way shall obligate Bank to make any future modifications
to the Indebtedness. Nothing in this Amendment shall constitute a satisfaction
of the Indebtedness. It is the intention of Bank and Borrower to retain as
liable parties, all makers and endorsers of Agreement, unless the party is
expressly released by Bank in writing. No maker, endorser, or guarantor will be
released by virtue of this Amendment. The terms of this paragraph apply not only
to this Amendment, but also to all subsequent loan modification requests.

D.This Amendment may be executed in two or more counterparts, each of which
shall be deemed an original, but all of which together shall constitute one
instrument.

E.This is an integrated Amendment and supersedes all prior negotiations and
agreements regarding the subject matter hereof. All modifications hereto must be
in writing and signed by the parties.

IV.Conditions Precedent. Except as specifically set forth in this Amendment, all
of the terms and conditions of the Agreement remain in full force and effect.
The effectiveness of this Agreement is conditioned upon receipt by Bank of this
Amendment, and any other documents which Bank may require to carry out the terms
hereof, including but not limited to the following:

A.This Amendment, duly executed by Borrower;

B.A modification fee from the Borrower in the amount of $4,200; and

C.Such other documents, and completion of such other matters, as Bank may
reasonably deem necessary or appropriate.

        IN WITNESS WHEREOF, the undersigned have executed this Amendment as of
the first date above written.

    AVISTAR COMMUNICATIONS CORPORATION
 
 
By:
 
/s/ Robert Habig

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Title:
 
CFO

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COMERICA BANK
 
 
By:
 
/s/ Robert Fernandez

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Title:
 
Vice President

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EXHIBIT D

COMPLIANCE CERTIFICATE

TO:   COMERICA BANK
FROM:
 
AVISTAR COMMUNICATIONS CORPORATION

        The undersigned authorized officer of AVISTAR COMMUNICATIONS CORPORATION
hereby certifies that in accordance with the terms and conditions of the Loan
and Security Agreement between Borrower and Bank (as amended, the "Agreement"),
(i) Borrower is in complete compliance for the period
ending                        with all required covenants except as noted below
and (ii) all representations and warranties of Borrower stated in the Agreement
are true and correct as of the date hereof, except those representations and
warranties expressly referring to another date shall be true, correct and
complete in all material respects as of such date. Attached herewith are the
required documents supporting the above certification. The Officer further
certifies that these are prepared in accordance with Generally Accepted
Accounting Principles (GAAP) (except for the absence of footnotes and subject to
normal year end adjustments) and are consistently applied from one period to the
next except as explained in an accompanying letter or footnotes.

Please indicate compliance status by circling Yes/No under "Complies" column.

Reporting Covenant

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  Required

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  Complies

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Monthly consolidated financial statements   Monthly within 30 days (or quarterly
if no borrowings)   Yes   No 10K and 10Q   10 days of SEC filing date   Yes   No
Quarterly consolidating financial statements   Quarterly within 30 days   Yes  
No A/R & A/P Agings   Monthly within 15 days if borrowing   Yes   No A/R Audit  
Initial and Semi-Annual   Yes   No

Financial Covenant

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  Required

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  Actual

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  Complies

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On a monthly basis:                   Minimum Adjusted Quick Ratio   .75:1.00  
     :1.00   Yes   No   Loan to Value Ratio   50%       %   Yes   No

Comments Regarding Exceptions: See Attached.
 
 
No     Received by:                                        
                            Sincerely,   AUTHORIZED SIGNER
 
 
Date:                                        
                                       

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SIGNATURE   Verified:                                      
                                   
                AUTHORIZED SIGNER

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TITLE
 
Date:                                        
                                       
 
 
Compliance Status                             Yes

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DATE    

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FOURTH AMENDMENT TO LOAN AND SECURITY AGREEMENT
RECITALS
AGREEMENT
EXHIBIT D COMPLIANCE CERTIFICATE
Please indicate compliance status by circling Yes/No under "Complies" column.