| Sonic Telecom Adopts Award-Winning Internet Telephony Products 
 A new deal / direction for GDC?
 
 I don't know.  But I'm...
 
 Happily Long GDC,
 Duke
 
 (full story)
 ------------------------------------------------------------
 
 HERNDON, Va. and WESTBORO, Mass., Nov. 11 /PRNewswire/ -- NETRIX
 Corporation's (Nasdaq: NTRX) and OpenROUTE Networks, Inc.'s, (Nasdaq: OPEN)
 award-winning Internet Telephony products have been adopted by Sonic
 Telecommunications International, Ltd., (Sonic Telecom) as that company's
 Voice over Packet Solution for voice and data services. Sonic Telecom, an
 international digital communications solutions provider, has already begun the
 implementation phase installing NETRIX/OpenROUTE equipment in several of its
 major telecommunications points of presence with significant quantities of
 additional NETRIX/OpenROUTE equipment to immediately follow.
 Based in Chantilly, Virginia, Sonic Telecom provides seamless end-to-end
 international multimedia service and billing by the byte for international
 broadband communications over its ATM network. Sonic Telecom's state-of-the-
 art network is designed and maintained to provide high-speed service for
 video, voice and data traffic.
 According to Sonic Telecom, Ltd. President and Chief Executive Officer
 Todd Ruelle, "NETRIX/OpenROUTE's solutions provide a unique combination of
 price and performance that allows Sonic Telecom to provide high quality voice
 services over our international network.  We consider their equipment to be a
 strategic enabler and we expect to deploy in excess of $10 million of
 NETRIX/OpenROUTE equipment over the next 12 months."
 Steven T. Francesco, NETRIX Chairman and Chief Executive Officer,
 commented, "We are pleased to have our solutions adopted by such a fast-
 growing, innovative firm as Sonic Telecom. I believe this represents the start
 of a trend of Service Providers merging NETRIX and OpenROUTE technologies that
 will be key to delivering new services."
 Todd Ruelle added, "We are excited about the new products that will be
 coming out of the combined NETRIX/OpenROUTE company. We expect to see
 significant requirements for the kinds of solutions that these two companies
 can provide."
 Bryan R. Holley, OpenROUTE Networks President and Chief Executive Officer
 added, "A $10 million opportunity validates the strategy and direction of the
 combined NETRIX/OpenROUTE company. The strength of our product sets merging
 will provide Sonic and other Service Providers with a growth path for years to
 come. If anyone needed evidence as to why NETRIX/OpenROUTE makes sense, this
 is it in a nutshell -- and this is only scratching the surface."
 
 About Sonic Telecom, Ltd.
 Privately-held Sonic Telecom is an international digital communications
 solutions provider of access, transport and termination for transmission of
 video, data and voice on a single ATM network at a fraction of the cost -- and
 with greater flexibility -- than private lines and frame relay services. It
 has points of presence in Amsterdam, Brussels, Frankfurt, London, New York,
 and Paris. The Chantilly, Virginia-based company plans service expansion
 throughout North America in 4Q'99. General DataComm (NYSE: GDC) and Viatel
 International, Inc. (Nasdaq: VYTL) are equity holders and strategic partners
 in the company. More information on the Web at: www.sonictelecom.com.
 
 About NETRIX
 NETRIX Corporation is a worldwide provider of voice and data networking
 products. NETRIX products are designed to transport voice over data networks
 to enable its customers to realize significant cost savings. NETRIX's
 customers include multinational corporations, emerging service providers, and
 government agencies in over 60 countries worldwide. On September 30, 1999,
 NETRIX announced it had signed a definitive agreement to merge with OpenROUTE
 (Nasdaq: OPEN).  This agreement still requires regulatory approval, as well as
 the approval of the shareholders of both companies in order to be completed.
 NETRIX corporate headquarters are located at 13595 Dulles Technology Drive,
 Herndon, Virginia 20171. Additional information can be found on the company's
 website at www.netrix.com.
 
 About OpenROUTE
 OpenROUTE Networks, a leading provider of Internet Access products, is
 "Opening the Internet for Business." OpenROUTE commercialized the industry's
 first multi-protocol router in 1985.  All products feature OpenROUTE router
 software, which is recognized by the industry as the best in its class.
 OpenROUTE software is licensed by IBM, Digital, Ascend Communications,
 Motorola and many leading vendors.  Today, OpenROUTE software powers more than
 200,000 routers worldwide. For more information, contact OpenROUTE Networks,
 Inc., Westboro, Mass., at 800-545-7464 or on the World Wide Web at
 openroute.com.
 
 Safe Harbor Statement
 This press release contains forward-looking statements that involve a
 number of risks and uncertainties, including references to the success of new
 products and the transition between the sale of old products and the sale of
 new products. Readers are cautioned that all forward-looking statements are
 subject to risks and uncertainties, including, without limitation, the timing
 of new announcements or introductions by the Company and its competitors, the
 hiring and retention of key employees, competitive pricing pressures, the
 manufacturing of products, the need for capital, dependence on third parties
 for manufacturing, components and products, general economic conditions in the
 United States and international markets, and the risk factors detailed from
 time to time in the Company's periodic reports and registration statements
 filed with the Securities and Exchange Commission. Readers are cautioned not
 to place undue reliance on these forward-looking statements that speak only as
 of the date hereof. The Company undertakes no obligation to publicly release
 the result of any revisions to these forward-looking statements that may be
 made to reflect events or circumstances after the date hereof or to reflect
 the occurrence of unanticipated events.
 
 SOURCE  NETRIX Corporation
 -0-                             11/11/1999
 /CONTACT:  Tony Morris of NETRIX/OpenROUTE, 703-742-6000 or
 tmorris@netrix.com; or Brian Koma of Stratagem Marketing, 703-591-6400 or
 bkoma@stratageminc.com/
 /Web site:  sonictelecom.com
 /Web site:  openroute.com
 /Web site:  netrix.com
 (NTRX OPEN GDC VYTL)
 
 CO:  NETRIX Corporation; OpenROUTE Networks, Inc.; Sonic Telecommunications
 International, Ltd.
 ST:  Virginia, Massachusetts
 IN:  CPR TLS
 SU:  CON
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