Table of Contents
Advertisement
Chapter 6: Modem Guide
Bell 103 Protocol
Bell 103 protocol is for 300 bps full-duplex connections. The features
described in this guide apply to Bell 103 operation except that your
modem does not support:
•
Digital (loop 1A) and analog (V.54 loop 3) loopback.
•
LAPM connections.
When your modem establishes a reliable Bell 103 connection,
NOTE
it displays CONNECT 103/REL - MNP. For a normal or direct
Bell 103 connection, the message is CONNECT.
6.4.1
Protocol Configuration Command Settings
When you send an AT string to the modem, it adjusts modem-port speed
automatically to match the AT speed. Use %G1 to disable this feature.
With %G1 set, you can change the modem speed with %Bn (where n is
the new modem speed) and %Fn.
This section lists settings to configure the modem for each mode and
protocol. Modem connection speeds are in parentheses.
Table 6-3 Configuring the Modem with %F0 Set
Protocol
V.21 (75-300 bps)
Bell 103 (75-300 bps)
V.22 (600 bps)
V.22 (1200 bps)
Bell 212A (1200 bps)
V.34/V.22bis (2400 bps)
V.34/V.32bis/V.32 (4800 bps)
V.34/V.32bis (7200 bps)
V.34/V.32bis/V.32 (9600 bps)
V.34/V.32bis (12000 bps)
6-10
Issue %G0:
B0 at 300 bps
B1 at 300 bps
at 600 bps
B0 at 1200 bps
B1 at 1200 bps
at 2400 bps
at 4800 bps
at 7200 bps
at 9600 bps
at 12000 bps
CSMIM-T1 Hardware Installation Guide
Issue %G1:
B0%B300
B1%B300
%B600
B0%B1200
B1%B1200
%B2400
%B4800
%B7200
%B9600
%B12000
Advertisement
Table of Contents
