Paradyne 3800PLUS User Manual
Page 145
AT Command Set and S-Registers
13-11
3980-A2-GB30-40
October 1998
Table 13-1
(9 of 15)
3800
Plus AT Commands
AT Command
Front Panel Branch
Description
&M
n
and &Q
n
Async/Sync Mode and DTE Dialer Type
&M0, &Q0
Modem operates in Asynchronous mode and uses
AT Command protocol.
&M1, &Q1
Modem operates in Synchronous mode and uses
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.
Configure\Edit\
DTE Dialer
&M3, &Q3
Modem operates in Synchronous mode and uses
AT Command protocol.
&M6, &Q6
Modem operates in Synchronous mode and dials telephone
number stored in directory location 1 when DTR signal turns
Off and then ON and the leased line is down.
&M231, &Q231
Modem operates in Asynchronous mode; the DTE Dialer
Type is disabled.
&M232, &Q232
Modem operates in Asynchronous mode; V.25bis Async
dialing is enabled.
&M233, &Q233
Modem operates in Synchronous mode; V.25bis Bisync
dialing is enabled.
&M234, &Q234
Modem operates in Synchronous mode; V.25bis HDLC
dialing is enabled.
&M235, &Q235
Modem operates in Asynchronous mode; AT&T
Exclusive dialing is enabled.
&M236, &Q236
Modem operates in Synchronous mode; the DTE Dialer
Type is disabled.
The &M2, &Q2, &M6, &Q6, &M231, &Q231, &M236, and &Q236
commands disable the use of AT commands and force the modem into
Dumb mode. The only way to gain control of the modem is the front panel.
&R
n
RTS Action
&R0 Standard RS232. RTS must be ON for the DTE to transmit to the
modem.
&R1 Ignores RTS. Modem acts as if RTS is always ON.
&R2 Simulated Control Carrier. RTS input controls the remote modem’s
LSD signal.
&R3 Control Carrier. The DTE’s RTS signal controls the modem’s carrier
signal.
Configure\Edit\
DTE Interface
&S
n
DSR Control
&S0 Forced On. DSR output is constantly ON.
&S1 Standard RS232. The modem controls DSR to the DTE, turning ON
DSR when handshaking begins, and Off upon disconnect.
&S2 Wink When Disconnect. DSR is normally ON, but is forced Off
momentarily during a disconnect.
&S3
Follows DTR. When the modem receives DTR from the DTE, it
sends DSR to the DTE.
&S4 On Early. DSR is Off when the modem is in an idle state, and goes
ON when a command is received to enter Data mode.
&S5 Delay to Data. Like Standard RS232, but DSR is not turned ON
until the modem is in Data mode.
&S6
Dial Backup Toggle. DSR is turned Off during a dial backup attempt,
and ON when the attempt is completed.
Configure\Edit\
DTE Interface