E911 behavior with GSRM in a wireless communication device

A method of E911 call behavior in a wireless communication device, comprising the steps of:

• idling in an emergency call back mode on a first system;
• receiving a global service redirection message (GSRM) from the first system, the GSRM comprising a redirect list;
• scanning a plurality of redirect systems on the redirect list;
• determining if a redirect system of the plurality of redirect systems is available;
• latching onto the redirect system if the redirect system is available;
• returning to idle on the first system if the redirect system in unavailable;
• receiving a subsequent GSRM from the first system;
• and
• remaining in the idle mode on the first system after the receipt of the subsequent GSRM.

A wireless communication device comprising:

• a processor;
• a memory coupled to the processor;
• a transceiver coupled to the processor;
• an input device coupled to the processor;
• software executable by the processor for carrying out the method of:
• (a) attempting to originate an emergency call on a first system;
• (b) receiving a global service redirection message (GSRM) from the first system, the GSRM comprising a return if failure (RIF) flag and a redirect list of alternate systems;
• (c) scanning the redirect list for available alternate systems;
• (d) if the alternate systems of the redirect list are not available, then attempting to originate the emergency call on the first system;
• (e) if the first system is not available, then attempting to originate the emergency call on an E911 list systems;
• (f) if the E911 list systems are not available, the attempting to originate the emergency call on the first system;
• (g) if the first system is not available, then entering an emergency silent redial scan mode to continue attempting origination on the first system if RIF is set to true;
• and
• (h) if the first system is not available, then repeating steps (b) through (g) if RIF is set to false.