User`s manual

U.S. Robotics I-modem Command Reference
Handshaking, Error Control, Data Compression, and Throughput • Page 11-2
Universal Connect
When you set the I-modem to Universal Connect and make or receive a call, the I-modem
tries a number of calls and detection processes.
*A Note About V.110 Connections
V.110 connections are not attempted by default. The I-modem attempts a V.110 connection
only if you set S67.0=1. When V.110 is enabled, the I-modem makes the V.110 attempt
third in the Universal Connect sequence.
In-Band Monitoring
Because the possibility always exists that calls can be labeled incorrectly by the telephone
companyÕs equipment, the I-modem monitors and compares the call set-up messages and
the activity on the line.
Call Call Type Protocol
1 64 Kbps Digital V.120
2 56 Kbps Digital V.120
3* £19.2 Kbps Digital V.110
4 3.1 kHz Audio V.34/V.FC/V.32terbo/etc.