Westermo GDW-11 - Manual (Page 187)

Specific AT commands 187 6615-2220
+WRIM – Ring Indicator Mode
Description:
This command sets the state of the Ring Indicator Mode.
… Up-down RI mode: no pulses are sent before unsolicited AT response. Up-down
signals are sent when receiving an incoming call.
… Pulse RI mode: an electrical pulse is sent on the Ring Indicator signal just before
sending any unsolicited AT response, in order to lose no AT responses when client
tasks are in sleep state. Still in RI mode, when receiving incoming calls, electrical
pulses are sent on the RI signal.
… Pulse RI Mode + Pulse On Packet Downloaded: based on Pulse RI mode but an
electrical pulse is also sent on the Ring Indicator signal just before sending a down-
loaded data packet (GPRS or CSD) if the remote client tasks has dropped down
his RTS signal.
Syntax:
AT+WRIM=<mode>[,<n>]
Parameters:
<mode>
0: Up-down RI mode
1: Pulse RI mode
2: Pulse RI mode + Pulse on Downloaded Packet
<n>
Used only in mode RI Pulse + Pulse on Downloaded packet (<mode>=2).
0: Duration of pulse is 5 μs.
1-31: Duration of pulse is n x 30μs. Pulse duration may be increased by up to 3 ms, due
to interrupt processes overhead.
NOTE:
Remind that this mode corresponds to the case where the remote equipment has
dropped its RTS signal, to stop its flow control.
Command example Possible responses Note
AT+WRIM=0 OK Select up-down RI mode
AT+WRIM=1 OK Select pulse RI mode
AT+WRIM=2,0 OK Select mode pulse RI +
Pulse on downloaded pack-
et, pulse duration is 5μs
AT+WRIM=? +WRIM: (0-2) possible values
OK
AT+WRIM? +WRIM: 1 current value
OK