User guide

Chapter 9 – Call Control Commands
Multi-Tech Systems, Inc. CDMA C1 AT Commands Reference Guide (PN S000478C) 37
Emergency Mode +WSOS
Description: In the event of a user-originated emergency call, the modem will automatically put itself into
Emergency callback state. The modem will remain on the same system to be able to receive
callbacks from emergency personnel. The modem behavior during Emergency callback state
depends on the factory-provisioned mode--Timer Reset Mode or Basic Mode. The mode is
carrier-specific.
Timer Reset Mode:
AT+WSOS can only query the Emergency callback state. The user cannot exit Emergency
callback state using the AT+WSOS=0 command. Emergency callback state is exited when:
• The modem is reset,
• The user originates a normal voice call, or
• The emergency callback timer expires. This timer is carrier-specific and is set in the
factory.
Basic Mode/No Timer
AT+WSOS=0 must be used to exit Emergency callback state. While in Emergency callback state,
only calls to emergency numbers can be established. Emergency callback state is exited when:
• The modem is reset, or
• The user enters AT+WSOS=0 to exit emergency callback state.
If neither Timer Reset Mode nor Basic Mode has been set in the factory, then AT+WSOS will
return ERROR.
In addition to 911, other emergency numbers are supported by the modem software. See the
AT$WEMER command.
Syntax: Command Syntax: AT+WSOS=<Action>
Command Possible Responses
AT+WSOS=0
Note: Exit Emergency callback state
(Basic Mode only)
+WSOS: 0
OK
Note: Successful exit of Emergency callback state
AT+WSOS=1 ERROR
Note: Cannot enter Emergency callback state
manually
AT+WSOS
Note: Ask for current Emergency
Mode state
+WSOS: 1
OK
Note: Emergency mode is active
Values: The parameters values are the following ones:
<Action>
0 Exit Emergency Mode
<State>
0 Not in Emergency Mode
1 Is in Emergency Mode