20
PCI Modem User’s Guide
the newer version of
Unimodem V
from the CD:
Simply insert the CD-ROM disc 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 driv-
ers may work better. Visit
www.modems.com
for
driver updates.
Most telephony voice software has features that re-
quire your computer to have a soundcard and
speakers, plus a microphone 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 negotiation 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
table, “protocol” means error correction and data
compression.
To force different communication speeds
Type these AT commands
and press Enter
Negotiate speed and protocol
(default setting)
AT &F
To force protocol
AT \N3
Dualmode (V.90 or V.92)—56000 bps
AT+MS=V92,1
V92 only (disable V.90)—56000 bps
AT+MS=V92,0
V.90 only (disable V.92)—56000 bps
AT+MS=V90,0
Disable both 56K and autorate on V.34—33600 bps
AT+MS=V34,1
V.34—33600 bps
AT+MS=V34,0
V.32bis—14400 bps
AT+MS=V32B,0
V.32—9600 bps
AT+MS=V32,0
2400 bps
AT+MS=V22B,0
1200 bps
AT+MS=V22,0
Summary of Contents for H08-15530
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