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8 Solving Problems
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MultiModemZBA-V-V92 User Guide
There Are Garbage Characters on the Monitor
Ö Your computer and the remote computer might be set to different word lengths, stop bits, or
parities. If you have connected at 8-N-1, try changing to 7-E-1, or vice-versa, using your
communication software.
Ö You might be experiencing line noise. Enable error correction, if it is disabled, or hang up and
call again; you might get a better connection the second time.
Ö At speeds above 2400 bps, the remote modem might not use the same transmission or error
correction standards as your modem. Try connecting at a slower speed or disabling error
correction. (With no error correction, however, line noise can cause garbage characters.)
Ö Try entering the I11 command in online mode or the &V command in command mode to
display information about the last connection, making a screen print of the connection statistics,
and checking for parameters that might be unacceptable.
The Modem Doesn’t Work with Caller ID
Ö 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).
Ö Make sure that you have Caller ID service from your telephone company.
Fax and Data Software Can’t Run at the Same Time
Ö Communication devices can be accessed by only one application at a time. Under DOS or Win-
dows 3.1x, you can run either your fax software or your data communications software, but not
both at the same time, unless you have a special communication device management applica-
tion. In Windows 95 and higher, you can have data and fax communication applications open at
the same time, but they cannot use the same modem at the same time.