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MultiModemZPX User Guide
There Are Garbage Characters on the Monitor
• 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.
• 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.
• At speeds above 2400 bps, the remote modem might not use the same transmis-
sion 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.)
• Enter the I11 command in online mode or the &V command in command mode
to display information about the last connection. Then make a screen print of the
connection statistics, and look for unacceptable parameters.
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 ini-
tialization 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 company.
Fax and Data Software Can’t Run at the Same Time
• Communication 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 data com-
munications software, but not both at the same time, unless you have a special
communication device management application. 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.
The Voice Functions Don’t Work
There are several tests that you can perform to verify the voice circuits of the Multi-
ModemZPX. First, make sure all connecting cables—telephone, microphone, and
speaker—are undamaged and firmly connected to the correct jacks. Then retry
whatever action was not working. If the problem persists, try the voice mail test; if
that doesn’t work, and if you have a microphone and speaker connected to the
MultiModemZPX, try the loopback and speakerphone tests, which do not require
special software.