AT Command Set and S-Registers
14-9
3910-A2-GN32-40
September 1998
Table 14-2
(5 of 10)
391x Series AT Commands
AT
Command
DCP LCD
Command
Sequence
Description
Zn
Reset and Load Active.
Z0
Loads configuration options from Active (Saved) to Active
(Operating).
Z1
Loads configuration options from Customer 1 to Active
(Operating).
Z2
Loads configuration from Customer 2 to Active (Operating).
Z3
Loads configuration options from Active (Saved) to Active
(Operating) and performs a reset.
Control\Reset
&Cn
LSD Control.
&C0
Forced On. LSD ON at all times.
&C1
Standard RS232. LSD is ON when the remote modem’s
carrier signal is detected. LSD is OFF when carrier signal is
not detected.
&C2
Wink When Disconnect. LSD normally forced ON, turns OFF
for approximately one second upon disconnecting.
&C3
Follows DTR. State of LSD follows state of DTR.
&C4
Simulated Control Carrier. State of LSD follows state of
remote modem’s RTS.
&C5
=DTR/Disconnect Off. State of LSD follows state of DTR
except upon a disconnect where DTR remains ON and LSD
turns OFF. DTR must then toggle OFF and ON to turn LSD
ON. Use this setting for AT&T DATAKIT applications. Note
that to use this option, the DTR Action configuration option
must be set to Stndrd_RS232 (&D1 or &D2).
Configure\Edit\
DTE Interface
&Dn
DTR Action.
&D0
Ignore. Modem ignores the true status of DTR and treats it
as always ON.
&D1,&D2,&D3
Standard RS232. DTR Signal is controlled by the DTE.
&D4
Controls On-Hook. Modem does not disconnect from the VF
line until DTR turns OFF.
&D5
Controls Transmitter Mute. Mutes the transmitter whenever
DTR drops on the DTE interface. This can be used on the
answer side modem to force the originate modem to initiate a
dial backup.
Configure\Edit\
DTE Interface
NOTE: Only the Standard RS232 setting is allowed in Austria.
