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User Guide
112
connecting at a slower speed or disabling error correction. (With no
error correction, however, line noise can cause garbage characters.)
Try entering the I11 ommand in online mode to display diagnostic
information, making a screen print of the diagnostics listing, and
checking for parameters that might be unacceptable (number of re-
trains, round trip delay, etc.).
The Modem Doesn’t Work with Caller ID
Caller ID information is transmitted between the first and second
rings, so if autoanswer is turned off (S0=0) or if the modem is set to
answer after only one ring (S0=1), the modem will not receive Caller
ID information. Check your initialization string, and if necessary
change it to set the modem to answer after the second ring (S0=2).
Make sure that you have Caller ID service from your telephone com-
pany.
Fax and Data Software Can’t Run at the Same Time
Communications devices can be accessed by only one application at a
time. Under DOS or Windows 3.1x, you can run either your fax software
or your datacomm software, but not both at the same time, unless you
have a special communications device management application. In
Windows 95, you can have data and fax communication applications
open at the same time, but they cannot use the same modem at the
same time.