Path: utzoo!telecom-request Date: Fri, 7 Jun 91 04:43:38 PDT From: cdp!erhall@labrea.stanford.edu Newsgroups: comp.dcom.telecom Subject: Re: Question About PC Pursuit and MNP Message-ID: Organization: TELECOM Digest Sender: Telecom@eecs.nwu.edu Approved: Telecom@eecs.nwu.edu X-Submissions-To: telecom@eecs.nwu.edu X-Administrivia-To: telecom-request@eecs.nwu.edu X-Telecom-Digest: Volume 11, Issue 435, Message 9 of 11 Lines: 40 Steve Forrette writes: > I need to know how to tell an MNP-compatible modem to pretend that it > doesn't have MNP, so that when it calls out and reaches another MNP > modem, it will "play dumb" and not enable MNP mode. In other words, > the connection will be a standard 2400 baud connection. [Describes problems when Outdial modem connects with MNP enabled.] > The Customer Service people at Telenet were of no help - they couldn't > quite understand the problem, and said that the only valid commands to > give an outdial modem were ATZ and ATDT. The PC Pursuit people should have known this one. The following is from one of the help files available on their own Net Exchange support BBS (from the '@' prompt, do a "c pursuit" to access it): "To modify MNP setting in the Hayes command mode: AT*E0 No MNP AT*E1 Auto MNP AT*E2 Force MNP (call will fail if MNP unavailable)" The ATZ command will reset the Outdial modem to default settings, including disabling of its MNP4 capability. It's wise to do that as soon as you connect to it, then enable MNP with AT*E1 if you want. The problem you're experiencing (with garbled data when MNP is enabled) seems to be caused by incorrect flow-control at the far end. Some BBSes I call work fine (EXEC-PC, for instance), while others (Channel1, in Boston, included) seem to ignore requests from SprintNet's side to stop sending data. If they continue to send, SprintNet's X.25 network has no choice but to throw away packets of data. I keep track of which ones don't work properly and don't enable MNP for those calls. Earl Hall | via PeaceNet: | GEnie: ERHALL Chicago IL | cdp!erhall@labrea.stanford.edu | +1 312 685 9735