Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!shadooby!samsung!gem.mps.ohio-state.edu!tut.cis.ohio-state.edu!CompuServe.COM!75046.606
From: 75046.606@CompuServe.COM (Larry W. Virden)
Newsgroups: comp.dcom.modems
Subject: Zenith Data Systems 2400 question
Message-ID: <"891027022231.75046.606.CHD29-1"@CompuServe.COM>
Date: 27 Oct 89 02:22:31 GMT
Sender: daemon@tut.cis.ohio-state.edu
Lines: 23

Hello!  I have a Zenith Data Systems 2400 baud modem and am having two 
persistent problems.  I would like to try to find explanations for these
problems.

1. When I start typing very quickly (30+ wpm) I find that my modem's
MR (modem ready) light begins to flash and I am no longer able to 
communicate with the host on the other side of the connection.  I AM
able to use the escape sequence to get a hold of the modem.  If I do
a AT Z I find that I can redial without a cold boot of the modem.
Can anyone tell me what would cause this condition and if there is
anything I could do to keep from having to restart a session?

2. I find that certain phone numbers (one or two out of a couple of
dozen that I use) my modem has trouble dialing!  Typically, when I
type in AT DT 5551212, my modem gets dial tone, dials the number, 
generates a tone, receives a complementary tone and makes a connection.
But with the certain number (which causes this over 60% of the time)
my modem doesnt get a dial tone but doesnt realize it, dials, generates
a tone and then times out because it never got an answer.  To resolve
the situation with this number I either have to reset using AT Z one
or more times or cold boot the modem.

I am wondering what might cause this problem.