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20 PCI Modem User’s Guide
•
Make sure your modem has hung up from the previous call.
Select
Hang Up
in your software; or type
ATH
in terminal
mode.
Problem
Telephony voice features do not work, or they work poorly.
Solution
The PCI Modem is designed to work with voice software that is
compatible with Windows TAPI (Telephony Application Pro-
gramming Interface) or with software that uses IS-101 com-
mands (IS-101 commands are sometimes called +V commands).
Consult your voice software’s documentation to determine
whether it supports TAPI and/or IS-101. Also, be sure you are
using the latest 32-bit version of the software.
Another possible problem is that your computer does not have
the latest version of
Unimodem V
, a set of drivers required for
TAPI applications. The software that installs your modem auto-
matically installs the latest version of
Unimodem V
if it is
needed. You may have subsequently installed a communications
package that automatically installs an older version of
Unimo-
dem V
. If that is the case, you can reinstall the newer version of
Unimodem V
from the CD: Simply insert the CD and rerun the
PCI installation from the installation interface.
•
The modem drivers that were installed with your PCI modem
may have been updated, and the new drivers may work better.
Visit
www.modems.com
for driver updates.
•
Most telephony voice software has features that require your
computer to have a sound card and speakers, plus a micro-
phone for recording.
Problem
The modem can connect to some modems, but not to others.
Solution
A remote modem does not respond because of the extended ne-
gotiation process by which modems determine the best common
connection between them. If this is the case, you may have to
disable part or all of the negotiation process. In the following ta-
ble, “protocol” means error correction and data compression.