User`s guide

56K Professional Message Modem32
PROBLEM
The modem displays double
characters on your monitor.
Both modems exchange
carrier signals but fail to
establish a link.
Your modem won’t connect at
2400 bps with a 2400 bps
modem.
DIAGNOSIS
Both the modem’s and
software’s local character
echoes are probably turned on.
You may have a poor line
connection.
The phone line might be
wired incorrectly.
The modem you’re trying to
connect with could be an older
model that does
not support error control.
POSSIBLE SOLUTION
Disable Local Echo in your
software OR on your
modem (not both). You can turn
the local echo off on
the modem by typing ATE0 and
pressing ENTER in
your software’s terminal mode.
To turn the local
echo off in the software,
refer to the software
documentation.
Try placing the call again.
The phone company routes
calls differently each time.
Contact the telephone
company and ask them to
make sure the tip and ring are
on the outside pair of wires.
You can disable error control
on your modem with the
following command entered in
the terminal mode: type
AT&M0 and press ENTER.
Now try placing the call to the
remote modem again. When
finished, reset your modem to
enable the error control
features. Type ATZ and
press ENTER in terminal
mode. Note: ATZ4 or
AT&F1 are often the best
reset strings, as they restore
hardware flow control
defaults.