Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!uunet!samsung!think.com!barmar From: barmar@think.com (Barry Margolin) Newsgroups: comp.protocols.tcp-ip Subject: Re: TCP/IP over X25 Message-ID: <1991Feb15.235715.21152@Think.COM> Date: 15 Feb 91 23:57:15 GMT References: Sender: news@Think.COM Distribution: comp.protocols.tcp-ip, comp.sys.dec, comp.sys.sun, comp.sys.hp Organization: Thinking Machines Corporation, Cambridge MA, USA Lines: 27 In article bogaart@lager.serc.nl (Eugene Bogaart) writes: >I am wondering if there are sofware products which can route tcp/ip >into X.25 package over an asynchronous communication port (RS232C or >like wise) following the RFC 877 standard. > >Several questions: > >Are there any products which function known. I am particularly >interested in software for DEC/Ultrix, SunOS, HP9000 architectures ? SunLink X.25 implements RFC877 for SunOS. The manual mentions one minor difference between its implementation and the RFC, though. Rather than creating and clearing X.25 virtual circuits dynamically, they must be created and cleared explicitly by using the x25enable and x25disable commands. >What is the maximum speed that is supported by such a product ? Most >kernels donot support very high speeds. Ultrix for instance does not >allow 19Kb or higher. Sun and HP do allow 19Kb transfer rates ! According to the manual, 19.2Kbps is the maximum speed using the CPU board serial ports, but you can go up to 64Kbps using an MCP or SCP. -- Barry Margolin, Thinking Machines Corp. barmar@think.com {uunet,harvard}!think!barmar