riddle@hoss.unl.edu (Michael H. Riddle) (11/16/90)
Can some of the net.gurus help me out? I have an (old) Mitac 2400BD (exact model number unknown). When calling some HST dual standards, I can connect fine at 2400. When calling others, something in the negotiation sequence causes my modem to give up and disconnect. I can't say for sure why it works fine for some and not for others. Local/long distance doesn't seem to affect it; rather, just something different in the way the distant end is negotiating. I've tried resetting different S registers, but if that will do it I haven't found the right setting for the right one. Does anyone in net.land have an idea for me? Please email, and if I get an idea that works I'll repost to the group. Thanks, Mike -- riddle@hoss.unl.edu | University of Nebraska riddle@crchpux.unl.edu | College of Law mike.riddle@f27.n285.z1.fidonet.org | Lincoln, Nebraska, USA
RAF@CU.NIH.GOV ("Roger Fajman") (11/18/90)
I run a BBS using USR Dual Standards modems. Some 2400 bps modems do
have a problem connecting with the USRs at 2400 bps. It also occurs
with other V.32 modems. There are some things that can be done with
the Dual Standard modems to minimize the problem. The ATI7 command
displays the ROM revision levels. You want the following or later:
Supervisor 09/29/89
IOP 08/08/89
DSP 09/18/89
Also, setting S28 to zero helps. Contrary to the implication in the
manual, it does not disable V.32.
Some of the problem is in the calling modems. Everex has a free
upgrade for their modems that is supposed to fix the problem.