Westermo GS-01 - Manual (Page 31)

31 6195-2201
&C – Set DCD signal
This commands controls the Data Carrier Detect (DCD) signal.
Application to GSM AT&C0 DCD always on
GSM to application OK Command valid
Application to GSM AT&C1 DCD matches state of the remote
modem’s data carrier
GSM to application OK Command valid
&D – Set DTR signal
This commands controls the Data Terminal Ready (DTR) signal.
Application to GSM AT&D0 the DTR signal is ignored
GSM to application OK Command valid
Application to GSM AT&D1 Modem switches from data to
command mode when DTR
switches from ON to OFF
GSM to application OK Command valid
Application to GSM AT&D2 Upon DTR switch from ON to
OFF, the call is clear down
GSM to application OK Command valid
&S – Set DSR signal
This commands controls the Data Set Ready (DSR) signal.
Application to GSM AT&S0 DSR Always on
GSM to application OK Command valid
Application to GSM AT&S1 DSR off in command mode,
DSR on in data mode
GSM to application OK Command valid
O – Back to online mode
If you have established a connection and the mobile is in online command mode, this
command allows to return to online data mode.
Application to GSM ATO
GSM to application OK Command valid