User guide
Chapter 6 – Troubleshooting
Multi-Tech Systems, Inc. MT9234ZBA-Series User Guide 29
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 company.
Fax and Data Software Can’t Run at the Same Time
● Communication devices can be accessed by only one application at a time. In Windows 2000 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.