Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!usc!wuarchive!emory!gatech!prism!gs26 From: gs26@prism.gatech.EDU (Glenn R. Stone) Newsgroups: comp.dcom.modems Subject: Re: Problems between T2500 and Hayes V series modems? Message-ID: <22621@hydra.gatech.EDU> Date: 22 Feb 91 17:36:08 GMT References: <786@dynasys.UUCP> <25116@netcom.COM> Organization: Dead Poets Society Lines: 27 In ebersman@uunet.uu.net (Paul Ebersman) writes: >>> From: Greg Andrews; Re: Problems between T2500 and Hayes V series modems?: >greg> Posted: Thu Feb 21 20:19:28 1991 >greg> I've seen this several times. It only happens when the T2500 calls the >greg> V-9600, and the V-9600 is *not* an Ultra 96. If the V-9600 calls the >greg> T2500, things are fine. Setting S50=3 (limit the modem to V.22bis and >greg> slower modulations) in the T2500 takes care of the problem.... >This may be due to the leading v.25 guard tone before PEP, introduced >at GE6.00 on the T2500's. There are ways of changing this behavior. Umm, if that is what was happening, it was set to do that.... S92 is 0 by default (PEP tones first); a 1 sets PEP last, and a 2 turns the V.25 guard tones on. >Telebit tends to recommend going with a PEP last answer sequence, Yeah, me, too, if you're going to get calls from V.32 (or other CCITT) modems. My T1600's are much happier when they don't have to wade thru PEP to get to the V.?? negotiation.... whilst another T2500 is set by default to wait 40 seconds before giving up, more than enough time to get to the PEP tones.... -- Glenn R. Stone gs26@prism.gatech.edu