Chapter 6: Modem Guide
6-10
CSMIM-T1 Hardware Installation 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.
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
NOTE
When your modem establishes a reliable Bell 103 connection,
it displays CONNECT 103/REL - MNP. For a normal or direct
Bell 103 connection, the message is CONNECT.
Protocol
Issue %G0:
Issue %G1:
V.21 (75-300 bps)
B0 at 300 bps
B0%B300
Bell 103 (75-300 bps)
B1 at 300 bps
B1%B300
V.22 (600 bps)
at 600 bps
%B600
V.22 (1200 bps)
B0 at 1200 bps
B0%B1200
Bell 212A (1200 bps)
B1 at 1200 bps
B1%B1200
V.34/V.22bis (2400 bps)
at 2400 bps
%B2400
V.34/V.32bis/V.32 (4800 bps)
at 4800 bps
%B4800
V.34/V.32bis (7200 bps)
at 7200 bps
%B7200
V.34/V.32bis/V.32 (9600 bps)
at 9600 bps
%B9600
V.34/V.32bis (12000 bps)
at 12000 bps
%B12000
Summary of Contents for CSMIM-T1
Page 2: ......
Page 8: ...viii CSMIM T1 Hardware Installation Guide ...
Page 26: ...Chapter 1 INTRODUCTION 1 14 CSMIM T1 Hardware Installation Guide ...
Page 84: ...Chapter 4 CSMIM T1 Parameters 4 16 CSMIM T1 Hardware Installation Guide ...
Page 184: ...Chapter 7 AT Commands and Registers 7 58 CSMIM T1 Hardware Installation Guide ...
Page 188: ...Appendix A PORT PIN SIGNAL ALLOCATIONS A 4 CSMIM T1 Hardware Installation Guide ...