Path: utzoo!attcan!uunet!samsung!zaphod.mps.ohio-state.edu!van-bc!ubc-cs!uw-beaver!sumax!halcyon!ralphs From: ralphs@halcyon.wa.com (Ralph Sims) Newsgroups: comp.mail.uucp Subject: Re: A small Telebit problem Message-ID: Date: 1 Jul 90 04:50:52 GMT References: <173@stephsf.stephsf.com> Organization: The 23:00 News Lines: 27 wengland@stephsf.stephsf.com (Bill England) writes: > I don't know mabey it's broken or something. It always throws PEP > signals, first thing, at calling modems, if S90=0 or S90=1. S90=2 > will give a tone on answer, and then it will throw a PEP screwing > everything up. Do you mean the S92 register? I known if you set S92=1, you will force PEP tones at the _end_ of the answer sequence. The S90 register seems to be used to enable v.22 (set S90-0). > I just want the PEP signals at the end of the answer sequence. > Thats all. Not a major request really. :-) Makes sense, especially since quite a number of 2400 baud modems and a greater number of 1200 baud modems barf when encountering PEP (or v.32 or MNP) tones in the handshake sequence. This shortcoming can often be overcome by setting the S9 and S10 register to 20 or greater, forcing the slower modem to ignore breaks in the data stream. This information is provided from my experience with an early Telebit Trailblazer and now with a TB+. I would think this would hold true for a T2500, also. -- "These are the days of lasers in the jungle..." Paul Simon, "The Boy In The Bubble" on the _Graceland_ album