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Appendix F – Modem AT Commands
Command:
%Rn
Cisco Configuration
Values:
n = 0, 1
Default:
0
Description:
%R0
%R1
Command:
%Sn
Command Speed Response
Values:
n = 0, 1
Default:
0
Description:
%S0
%S1
Command:
$Dn
DTR Dialing
Values:
n = 0 or 1
Default:
0
Description:
$D0
$D1
Command:
$EBn
Asynchronous Word Length
Values:
n = 0 or 1
Default:
0
Description:
$EB0
$EB1
Command:
$MBn
Online BPS Speed
Values:
n = speed in bits per second
Default:
28,800
Description:
$MB75
$MB300
$MB1200
$MB2400
$MB4800
$MB9600
$MB14400
$MB19200
$MB28800
$MB33600
Command:
$RPn
Ring Priority vs. AT Command Priority
Values:
n = 0 or 1
Default:
1
Description:
$RP0 The AT command will have priority over the ring. S1 will be reset to 0 if an AT
command is received. This command is storable to memory.
$RP1 The ring will have priority over the AT command. S1 will increment even if an AT
command and ring are received together and the incoming call will be answered when S1 is
equal to S0.
Note:
valid ring.
Command:
$SBn
Values:
Default:
Description:
$SB300
$SB1200
$SB2400
$SB4800
$SB9600
$SB19200
$SB38400
$SB57600
$SB115200 Sets serial port to 115200 bps
$SB230400 Sets serial port to 230400 bps
62
Disables Cisco configuration.
Sets E0, Q1, &D0, \N0, $SB9600, and %S1 for operation with a Cisco router.
Sets modem to respond to AT commands at all normal speeds.
AT commands accepted at 115200 bps only. Commands at other speeds are
ignored.
Disables DTR dialing.
Dials the number in memory location 0 when DTR goes high.
Enables 10-bit mode.
Enables 11-bit mode.
Selects CCITT V.23 mode
Selects 300 bps on-line
Selects 1200 bps on-line
Selects 2400 bps on-line
Selects 4800 bps on-line
Selects 9600 bps on-line
Selects 14400 bps on-line
Selects 19200 bps on-line
Selects 28800 bps on-line
Selects 33600 bps on-line
SocketModems do not detect ring cadence of TelTone telephone line simulators as a
Serial Port Baud Rate
n= speed in bits per second
57600
Sets serial port to 300 bps
Sets serial port to 1200 bps
Sets serial port to 2400 bps
Sets serial port to 4800 bps
Sets serial port to 9600 bps
Sets serial port to 19200 bps
Sets serial port to 38400 bps
Sets serial port to 57600 bps
Multi-Tech Systems, Inc. MultiAccess User Guide
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