Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: utzoo!mnetor!uunet!seismo!rochester!rutgers!ucla-cs!zen!ucbvax!hplabs!pyramid!csg From: csg@pyramid.pyramid.com (Carl S. Gutekunst) Newsgroups: comp.dcom.modems Subject: Re: Synchronous 9600bps Smart Modems? Message-ID: <4258@pyramid.pyramid.com> Date: Sun, 2-Aug-87 15:34:59 EDT Article-I.D.: pyramid.4258 Posted: Sun Aug 2 15:34:59 1987 Date-Received: Sun, 2-Aug-87 22:11:46 EDT References: <616@bbking.PRC.Unisys.COM> <3649@well.UUCP> <54@oresoft.UUCP> Reply-To: csg@pyramid.UUCP (Carl S. Gutekunst) Distribution: na Organization: Pyramid Technology Corp., Mountain View, CA Lines: 18 >> The Telebit Trailblazer (or whatever they're calling it now) does >>autodialing and just about every other Hayes command you care to name. > >Neither the Telebit Trailblazer nor the US Robotics HST are *synchronous*. Although the original reply was obviously confused, Telebit does in fact now have a synchronous version of the Trailblazer. We evaluated one, though we didn't have the means to test the synch mode much. It is half duplex, using Telebit's proprietary PEP encoding. Assuming they didn't break anything, it should work about as well as the asynch mode: tempermental but functional. The Racal Vadic 9600VP will also do 9600bps V.29 half duplex synchronous. Several vendors now offer V.32 full duplex synch modems for $2500 and up. But the limited experience I have with V.32 suggests that Telebit's PEP remains far and away the most reliable encoding mechanism over arbitrary phone lines.