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MT5634/MT9234 Modem; AT Command Set
Command: %DCn AT Command Control
Values: n = 0 or 1
Default: 0
Description: %DC0 The modem responds to AT commands.
%DC1 The modem ignores AT commands.
Note: The modem will respond to AT%DC for 10 seconds
after power-up.
Command: %En Fallback and Fall Forward Control
Values: n = 0, 1, or 2
Default: 2
Description: %E0 Disable fallback and fall forward.
%E1 Enable fallback, disable fall forward.
%E2 Enable fallback and fall forward.
Command: %Hn Direct Connect Enable
Values: n = 0, 1
Default: 0
Description: %H0 Sets callback security to normal operation.
%H1 All callback security calls will be direct connect
regardless of whether the password or phone number
has the
- character.
Command: %Rn Cisco Configuration
Values: n = 0, 1
Default: 0
Description: %R0 Disables Cisco configuration.
%R1 Sets E0, Q1, &D0, \N0, $SB9600, and %S1 for
operation with a Cisco router.
Command: %Sn Command Speed Response
Values: n = 0, 1
Default: 0
Description: %S0 Sets modem to respond to AT commands at all
normal speeds.
%S1 AT commands accepted at 115200 bps only.
Commands at other speeds are ignored.
Command: $Dn DTR Dialing
Values: n = 0 or 1
Default: 0
Description: $D0 Disables DTR dialing.
$D1 Dials the number in memory location 0 when
DTR goes high.