NETRIX CORPORATION
                          13595 Dulles Technology Drive
                             Herndon, Virginia 20171

                          ----------------------------
                             SUBSCRIPTION AGREEMENT
                          ----------------------------


      Re:   $4,000,000 OF SERIES A 8% CONVERTIBLE PREFERRED STOCK
            -----------------------------------------------------

Dear Purchaser:

            Netrix  Corporation,  a Delaware  corporation  (the  "Company"),  is
offering to sell up to $4,000,000 of Series A 8% Convertible  Preferred Stock of
the  Company  (the  "Preferred  Stock") to certain  "accredited  investors"  (as
defined under the Securities Act of 1933 (the "Securities  Act")).  The terms of
this offering (the "Offering") are set forth in a Confidential Private Placement
Memorandum dated April 22, 1999, as the same may be amended or supplemented (the
"Offering  Memorandum").  The purchase price per share of Preferred Stock is the
greater of $13.75 or five times the closing bid price for the  Company's  Common
Stock (the "Common  Stock") on the Nasdaq National Market for the 10 trading day
period  immediately  preceding the first closing in the Offering.  The Preferred
Stock is being offered by the Company pursuant to Section 4(2) of the Securities
Act and/or Rule 506 of Regulation D promulgated thereunder. The Offering will be
made by the  Company  on an "all or none"  basis as to the first  $2,000,000  of
Preferred  Stock and a "best  efforts"  basis as to the remaining  $2,000,000 of
Preferred Stock. The minimum subscription is $100,000,  subject to waiver to the
discretion of the Company.

            The  Preferred  Stock is subject to the  benefits of a  Registration
Rights  Agreement,  a form of which is  available  upon request from the Company
(the "Registration  Rights Agreement")  providing for registration of the Common
Stock  issuable  upon  conversion  of the  Preferred  Stock and any Common Stock
issuable  as a  dividend  on the  Preferred  Stock.  The  designations,  powers,
preferences  and  rights  of  the  Preferred   Stock  and  the   qualifications,
limitations  and  restrictions  of  the  Preferred  Stock  are  set  forth  in a
Certificate  of  Designations,  the form of which is available upon request from
the Company (the "Certificate of Designations"). The Certificate of Designations
will be filed with the  Secretary of State of the State of Delaware  immediately
prior to the initial closing in the Offering.

            Subscriptions  shall be paid by check or wire transfer and deposited
in an escrow account maintained by Republic National Bank of New York, New York,
New York (the "Escrow Agent") until accepted by the Company.  This  subscription
may be accepted by the Company at any time after receipt of subscriptions for at
least  $2,000,000 of Preferred Stock and prior to the end of the Offering Period
(as  defined  in Section  1(c)).  If your  subscription  is not  accepted,  your
subscription  payment  will be  immediately  returned  to you.  At the  time the
Company accepts  subscriptions,  certificates  representing  the Preferred Stock
will be issued by the Company to the investors.


                                       1




     1. SUBSCRIPTION; THE OFFERING.

     (a) By your  execution of this  Subscription  Agreement and delivery of the
subscription amount to the Company, you hereby irrevocably subscribe to purchase
the amount of Preferred Stock set forth on the signature page of this Agreement.

     (b)  Subscription  payments by check  should be made  payable to  "Republic
National  Bank of New York,  as The  Escrow  Agent for Netrix  Corporation"  and
should be delivered,  together with two fully  executed and completed  copies of
this Subscription  Agreement to:

               Mr. James McCullough
               Renwick Corporate Finance, Inc.
               50 East 42nd Street, Suite 1306
               New York, New York 10017
               Telephone:  (212) 490-2387

If you prefer to wire your  subscription  payment  directly to the Escrow Agent,
please  contact Mr.  McCullough  at the above address and phone number to obtain
wiring instructions.

     (c) The Offering  will expire on May 15, 1999,  subject to extension by the
Company at its discretion (the "Offering  Period").  Any subscriptions  received
after the end of the Offering  Period or received but not accepted  prior to the
end of the Offering Period will be returned in full.

     (d) This  subscription  is  subject  to the  terms  and  conditions  of the
Offering  which  are  described  herein  and in the  Offering  Memorandum.  Upon
acceptance  by the Company of this  subscription,  and  following  clearance  of
funds,  the Company will  deliver to you a Preferred  Stock  certificate  in the
amount  subscribed  for and a signed  Subscription  Agreement  and  Registration
Rights Agreement.

     2.   ACCEPTANCE  OR  REJECTION  OF   SUBSCRIPTIONS.   You  agree  that  all
subscriptions for Preferred Stock (including this subscription) are made subject
to the following  terms and  conditions (as well as the terms and conditions set
forth in the Offering Memorandum):

     (a) All subscriptions payments will be held in an escrow account maintained
at the Escrow Agent until accepted or rejected by the Company.

     (b) The Company may accept  subscriptions  received by it in such order and
at such time,  prior to termination of the Offering,  as the Company may, in its
sole discretion,  determine, provided that no subscription may be accepted until
at least $2,000,000 of Preferred Stock is subscribed for.

     (c) The Company shall have the right, in its sole discretion, to reject any
subscription in whole or in part for any reason.

     (d) Any subscription  received but not accepted by the Company prior to the
end of the  Offering  Period or  received  by the  Company  after the end of the
Offering Period will be rejected by the Company.

                                       2




     (e) If your  subscription  is rejected  by the Company for any reason,  the
Escrow  Agent shall  promptly  return  (subject to delay as  necessary to permit
funds deposited to clear) to you your executed Subscription  Agreements together
with all funds paid by you, without deduction and without interest.

     (f) If your  subscription  is accepted only in part,  then the Escrow Agent
shall promptly  return  (subject to delay as necessary to permit funds deposited
to clear) to you that part of all  funds  paid by you  relating  to that part of
your subscription which is not accepted, without deduction and without interest.

     3. REPRESENTATIONS AND WARRANTIES OF THE INVESTOR. You hereby represent and
warrant to, and agree with, the Company as follows:

     (a) You are an  "Accredited  Investor"  as that term is  defined in Section
501(a) of Regulation D promulgated  under the Securities Act.  Specifically  you
are (EACH INVESTOR MUST CHECK APPROPRIATE ITEM(S)):

      |_|(i) A bank as defined in Section  3(a)(2) of the  Securities  Act, or a
         savings and loan association or other institution as defined in Section
         3(a)(5)(A) of the Securities  Act,  whether acting in its individual or
         fiduciary  capacity;  a broker or dealer registered pursuant to Section
         15 of the  Securities  Exchange Act of 1934, as amended (the  "Exchange
         Act");  an  insurance  company  as  defined  in  Section  2(13)  of the
         Securities Act; an investment  company  registered under the Investment
         Company  Act of 1940 or a  business  development  company as defined in
         Section  2(a)(48)  of that Act;  a small  business  investment  company
         licensed by the U.S. Small Business Administration under Section 301(c)
         or (d) of the Small Business Investment Act of 1958; a plan established
         and maintained by a state, its political subdivisions, or any agency or
         instrumentality  of a  state  or its  political  subdivisions,  for the
         benefit of its  employees,  if such plan has total  assets in excess of
         $5,000,000; an employee benefit plan within the meaning of the Employee
         Retirement  Income Security Act of 1974, if the investment  decision is
         made by a plan  fiduciary,  as defined  in  Section  3(21) of such Act,
         which  is  either  a bank,  savings  and  loan  association,  insurance
         company,  or registered  investment advisor, or if the employee benefit
         plan has total assets in excess of  $5,000,000  or, if a  self-directed
         plan,  with  investment  decisions  made  solely  by  persons  that are
         accredited investors;

      |_|(ii) A private  business  development  company  as  defined  in Section
         202(a)(22) of the Investment Advisers Act of 1940;

      |_|(iii) An  organization  described in Section  501(c)(3) of the Internal
         Revenue Code, corporation,  Massachusetts or similar business trust, or
         partnership,  not formed for the  specific  purpose  of  acquiring  the
         securities offered, with total assets in excess of $5,000,000;

      |_| (iv)  A director or executive officer of the Company;


                                       3



      |_|(v) A natural  person whose  individual  net worth,  or joint net worth
         with that person's  spouse,  at the time of his or her purchase exceeds
         $1,000,000;

      |_|(vi) A  natural  person  who had an  individual  income  in  excess  of
         $200,000 in each of the two most recent years or joint income with that
         person's  spouse in excess of $300,000 in each of those years and has a
         reasonable expectation of reaching the same income level in the current
         year;

      |_|(vii) A trust,  with total assets in excess of  $5,000,000,  not formed
         for the specific  purpose of acquiring the  securities  offered,  whose
         purchase is directed by a  sophisticated  person as  described  in Rule
         506(b) (2) (ii); or

      |_|(viii)  An  entity in which all of the  equity  owners  are  accredited
         investors.  (If this  alternative  is checked,  you must  identify each
         equity owner and provide  statements  signed by each  demonstrating how
         each qualifies as an accredited investor.)

     (b) If you are a natural person, you are: a bona fide resident of the state
contained in your address set forth on the signature  page of this  Agreement as
your home  address;  at least 21 years of age; and legally  competent to execute
this  Agreement.  If you are an entity,  you are duly authorized to execute this
Agreement  and  this  Agreement,  when  executed  and  delivered  by  you,  will
constitute your legal, valid and binding obligation  enforceable  against you in
accordance with its terms.

     (c) You have received, read carefully and are familiar with this Agreement,
the Offering  Memorandum,  the Certificate of Designations  and the Registration
Rights  Agreement.  Respecting  the Company,  its business,  plans and financial
condition,  the terms of the Offering, the Preferred Stock and any other matters
relating to the Offering: you have received and reviewed the Offering Memorandum
and all other  materials  which have been  requested by you; and the Company has
answered all inquiries that you or your representatives have put to it. You have
had access to all additional information necessary to verify the accuracy of the
information set forth in this Agreement,  the Offering  Memorandum and any other
materials  furnished  herewith,  and you have taken all the steps  necessary  to
evaluate the merits and risks of an investment as proposed hereunder.

     (d) You or your purchaser representative have such knowledge and experience
in finance, securities,  investments and other business matters so as to be able
to  protect  your  interests  in  connection  with  this  transaction,  and your
investment in the Company  hereunder is not material when compared to your total
financial capacity.

     (e) You  understand  the various  risks of an  investment in the Company as
proposed  herein and can afford to bear such risks,  including,  but not limited
to,  the  risks of losing  your  entire  investment.

     (f) You will acquire the  Preferred  Stock for your own account (or for the
joint  account of you and your spouse  either in joint  tenancy,  tenancy by the
entirety or tenancy in common) for investment and not with a view to the sale or
distribution thereof or the granting of any participation  therein, and that you
have no  present  intention  of  distribution  or  selling to others any of such
interest or granting any participation therein.


                                       4




     (g)  Without  limiting  any of your other  representations  and  warranties
hereunder,  you  acknowledge  that you have  reviewed  and are aware of the Risk
Factors set forth in the Offering Memorandum.

     4. TRANSFER RESTRICTIONS.

     (a) You agree not to sell any Common  Stock  acquired  upon  conversion  of
Preferred  Stock prior to May 15,  2000,  unless (and to the extent) such shares
have been  released  from  this  obligation  in  accordance  with the  following
provisions of this Section 4(a).

     (i)  If the average  closing  bid price for the Common  Stock on the Nasdaq
          National  Market over a period of 10  consecutive  trading  days is at
          least 125% of the initial  conversion price of the Preferred Stock set
          forth in the  Certificate  of  Designations,  then 25% of your  Common
          Stock will be released  from the sales  restriction  effective at that
          time.

     (ii) If the average  closing  bid price for the Common  Stock on the Nasdaq
          National  Market over a period of 10  consecutive  trading  days is at
          least 156% of the initial  conversion price of the Preferred Stock set
          forth in the  Certificate of  Designations,  then an additional 25% of
          your  Common  Stock  (50%  total)  will be  released  from  the  sales
          restriction effective at that time.

     (iii)If the average  closing  bid price for the Common  Stock on the Nasdaq
          National  Market over a period of 10  consecutive  trading  days is at
          least 195% of the initial  conversion price of the Preferred Stock set
          forth in the  Certificate of  Designations,  then an additional 25% of
          your  Common  Stock  (75%  total)  will be  released  from  the  sales
          restriction effective at that time.


     (iv) If the average  closing  bid price for the Common  Stock on the Nasdaq
          National  Market over a period of 10  consecutive  trading  days is at
          least 244% of the initial  conversion price of the Preferred Stock set
          forth in the Certificate of  Designations,  then all remaining  Common
          Stock will be released  from the sales  restriction  effective at that
          time.


     (b) You have been advised by the Company that the  Preferred  Stock and the
Common Stock  issuable upon  conversion  of the Preferred  Stock or as dividends
thereon  (collectively,  the  "Securities")  have not been registered  under the
Securities Act, that the Securities will be issued on the basis of the exemption
provided by Section 4(2) of the  Securities  Act and/or Rule 506 of Regulation D
promulgated  thereunder  relating to transactions by an issuer not involving any
public  offering and under similar  exemptions  under  certain state  securities
laws; that this  transaction has not been reviewed by, passed on or submitted to
any Federal or state agency or  self-regulatory  organization where an exemption
is being relied upon, and that the Company's  reliance  thereon is based in part
upon the representations made by you in this Agreement. You acknowledge that you
have been informed by the Company of, or are otherwise familiar with, the nature
of the  limitations  imposed by the Securities Act and the rules and regulations
thereunder on the transfer of securities. In particular, you agree that no sale,
assignment or transfer of the  Securities  shall be valid or effective,  and the
Company shall not be required to give any effect to any such sale, assignment or
transfer,  unless (i) the sale,  assignment  or  transfer of the  Securities  is

                                       5



registered under the Securities Act, it being understood that the Securities are
not  currently  registered  for sale and that the Company has no  obligation  or
intention  to  so  register  the  Securities   except  as  contemplated  by  the
Registration  Rights  Agreement,  or (ii) the Securities  are sold,  assigned or
transferred in accordance with all the  requirements and limitations of Rule 144
under the Securities Act, it being  understood that Rule 144 is not available at
the present time for the sale of the Securities, or (iii) such sale, assignment,
or transfer is otherwise exempt from registration  under the Securities Act. You
acknowledge  that the  Securities  shall be subject to a stop transfer order and
the  certificate  or  certificates  evidencing  any  Securities  shall  bear the
following or a  substantially  similar  legend and such other  legends as may be
required by state blue sky laws:

               "THE SECURITIES REPRESENTED BY THIS CERTIFICATE WERE ACQUIRED FOR
               INVESTMENT ONLY AND NOT FOR RESALE. THEY HAVE NOT BEEN REGISTERED
               UNDER  THE  SECURITIES  ACT OF 1933,  AS  AMENDED,  OR ANY  STATE
               SECURITIES  LAW. THESE  SECURITIES MAY NOT BE SOLD,  TRANSFERRED,
               PLEDGED,  HYPOTHECATED  OR  OTHERWISE  DISPOSED  OF UNLESS  FIRST
               REGISTERED  UNDER SUCH LAWS,  OR UNLESS THE COMPANY HAS  RECEIVED
               EVIDENCE  REASONABLY  SATISFACTORY TO IT THAT REGISTRATION  UNDER
               SUCH LAWS IS NOT REQUIRED."

     5.  INDEMNIFICATION.  You  acknowledge  that you understand the meaning and
legal consequences of the representations and warranties  contained in Section 3
hereof and the agreement  contained in Section 4 hereof, and you hereby agree to
indemnify and hold harmless the Company and each  officer,  director,  employee,
agent and controlling  person thereof from and against any and all loss,  damage
or disability  due to or arising out of a breach of any such  representation  or
warranty.

     6. BINDING  EFFECT.  This Agreement  shall be binding upon and inure to the
benefit of the Company  and you,  and our  respective  successors  and  assigns.
Nothing in this  Agreement  is intended or shall be construed to confer upon any
other person any right,  remedy or claim, in equity or at law, or to impose upon
any other person any duty, liability or obligation.

     7. MISCELLANEOUS.

     (a) All notices and other communications provided for hereunder shall be in
writing,  and,  if to you,  shall be  delivered  or  mailed by  registered  mail
addressed to you at your address as set forth below, or to such other address as
you may  designate to the Company in writing,  and if to the  Company,  shall be
delivered or mailed by registered mail to the Company at 13595 Dulles Technology
Drive, Herndon,  Virginia 20171, Attention:  President, or to such other address
as the Company  may  designate  to you in writing,  with a copy to Kelley Drye &
Warren LLP, Two Stamford Plaza,  281 Tresser  Boulevard,  Stamford,  Connecticut
06901, Attention: Jay R. Schifferli. All such notices shall be effective one day
after delivery or three days after mailing.

     (b) This  Agreement  shall be construed in accordance  with and governed by
the  internal  laws of the State of Virginia  without  reference to that State's
conflicts of laws provisions.

                                       6




     (c) This Agreement  constitutes  the entire  agreement  between the parties
hereto with  respect to the subject  matter  hereof and may be amended only by a
writing executed by all parties hereto.

     (d)  This   Agreement   may  be  executed  in  one  or  more   counterparts
representing, however, one and the same agreement.

            IN WITNESS WHEREOF,  the parties hereto have executed this Agreement
as of the day and year this subscription has been accepted by the Company as set
forth below.

                                    Very truly yours,

                                    NETRIX CORPORATION



                                    By: _________________________________
                                         Name:
                                         Title:

                                       7






                SIGNATURE PAGE FOR SUBSCRIPTION BY INDIVIDUALS

          (NOT APPLICABLE TO SUBSCRIPTIONS BY ENTITIES, INDIVIDUALS
                RETIREMENT ACCOUNT, KEOGH PLANS OR ERISA PLAN)

TOTAL SUBSCRIPTION AMOUNT $ ____________________.  [THIS MUST BE COMPLETED.]

- --------------------------------------------------------------------------------
Check One:

|_|  INDIVIDUAL OWNER                   |_|  CUSTODIAN UNDER
     (One signature required below)          UNIFORM GIFTS TO MINORS ACT

|_|  JOINT TENANTS WITH RIGHT
     OF SURVIVORSHIP                       _____________________________________
     (All tenants must sign below)          (Insert applicable state)
                                            (Custodian must sign below)

|_|  TENANTS IN COMMON                  |_|  COMMUNITY PROPERTY
     (All tenants must sign below)           (Both spouses in community
                                              property states must sign below)
- --------------------------------------------------------------------------------

PRINT INFORMATION AS IT IS TO APPEAR ON THE COMPANY RECORDS.

- ----------------------------------------  --------------------------------------
(Name of or Subscriber)                   (Social Security or Taxpayer ID No.)

- ----------------------------------------  --------------------------------------

- ----------------------------------------  --------------------------------------
(Home Address)                            (Home Telephone)

- ----------------------------------------

- ----------------------------------------  --------------------------------------
(Business Address)                        (Business Telephone)

- --------------------------------------------------------------------------------

- ----------------------------------------  --------------------------------------
(Name of Co-Subscriber)                   (Social Security or Taxpayer ID No.)

- ----------------------------------------

- ----------------------------------------  --------------------------------------
(Home Address)                            (Home Telephone)

- ----------------------------------------

- ----------------------------------------  --------------------------------------
(Business Address)                        (Business Telephone)
- --------------------------------------------------------------------------------

                                  SIGNATURE(S)

Dated:-------------------------------

 (1) By:--------------------------------- (2) By:-------------------------------
        Signature of Authorized Signatory        Signature or Authorized
                                                 Co-Signatory

- ----------------------------------------  --------------------------------------
Print Name of Signatory and Title,        Print Name of Co-Signatory and Title,
if applicable                             if applicable

================================================================================
ACCEPTED AND AGREED:
NETRIX CORPORATION


By:-----------------------------------    Dated:--------------------------------




                 SIGNATURE PAGE FOR SUBSCRIPTION BY ENTITIES


TOTAL SUBSCRIPTION AMOUNT $___________________.  [THIS MUST BE COMPLETED.]

- --------------------------------------------------------------------------------
Check one:
    |_|  EMPLOYEE BENEFIT PLAN OR TRUST (including pension plan, profit sharing
         plan, other defined contribution plan and SEP)

    |_|  IRA, IRA ROLLOVER OR KEOGH PLAN

    |_|  TRUST (other than employee benefit trust)

    |_|  CORPORATION   (Please include certified corporate resolution
         authorizing signature)

    |_|  PARTNERSHIP

    |_|  OTHER -----------------------------------------------------------------
- --------------------------------------------------------------------------------


PRINT INFORMATION AS IT IS TO APPEAR ON THE COMPANY RECORDS.

- ----------------------------------------        --------------------------------
(Name of Subscriber)                            (Taxpayer ID No.)


- ----------------------------------------        --------------------------------
                                                (Plan number, if applicable)

- ----------------------------------------        --------------------------------
(Address)                                       (Telephone Number)

- --------------------------------------------------------------------------------
Name and Taxpayer ID number of sponsor, if applicable

      The  undersigned   trustee,   partner,   corporate  officer  or  fiduciary
certificates that he or she has full power and authority from all beneficiaries,
partners or shareholders of the entity named above to execute this  Subscription
Agreement  on behalf of the entity and to make the  representations,  warranties
and agreements made herein on their behalf and that investment in the Securities
has been affirmatively  authorized by the governing board or body of such entity
and is not prohibited by law or the governing documents of the entity.

                                   SIGNATURES


Dated:---------------------------------


By:------------------------------------  By:-----------------------------------
   Signature of Authorized Signatory        Signature of Authorized Co-Signatory


   ------------------------------------     ------------------------------------
   Print Name of Signatory                  Print Name of Required Co-Signatory


   ------------------------------------     ------------------------------------
   Print Title of Signatory                 Print Title of Required Co-Signatory


ACCEPTED AND AGREED:
NETRIX CORPORATION

By:------------------------------------      Dated:-----------------------------