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AT Command Set and S-Registers
5-113920-A2-GN31-30 November 1996
Table 5-2
(6 of 9)
392x
Plus
AT Commands
AT
Command
DCP LCD
Command
Sequence
Description
&M
n
and
&Q
n
Async/Sync Mode and DTE Dialer Type.
&M0, &Q0 Modem operates in Asynchronous mode using AT Command
protocol.
&M1, &Q1 Modem operates in Synchronous mode using AT Command
protocol.
&M2, &Q2 Modem operates in Synchronous mode and dials telephone number
stored in directory location 1 when DTR signal turns OFF and then
ON.
&M3, &Q3 Modem operates in Synchronous mode using AT Command
protocol.
&M231 Modem operates in Asynchronous mode using no AT Command
protocol.
&M232 Modem operates in Asynchronous mode using V.25bis
asynchronous AT Command protocol.
&M233 Modem operates in Synchronous mode using V.25bis
bisynchronous AT Command protocol.
&M234 Modem operates in Synchronous mode using V.25bis HDLC AT
Command protocol.
&M235 Modem operates in Asynchronous mode using AT&T Emulation AT
Command protocol.
&M236 Modem operates in Synchronous mode using no AT Command
protocol.
Configure\Edit\
DTE Dialer
The following commands disable the use of AT commands and force the modem
into Dumb mode: &M2, &Q2, &M231, &M232, &M233, &M234, &M235, &M236.
NOTE: The only way to gain control of the modem is via the DCP.
&R
n
RTS Action.
&R0 Standard RS232.
&R1 Ignores RTS.
&R2 Simulated Control Carrier.
&R3 Control Carrier.
Configure\Edit\
DTE Interface
&S
n
DSR Control.
&S0 Forced On.
&S1 Standard RS232.
&S2 Wink When Disconnect.
&S3 Follows DTR.
&S4 On Early.
&S5 Delay to Data.
Configure\Edit\
DTE Interface