Method and system for indirectly establishing a call
View Patent ↗A call is indirectly established by triggering a call register to request a mobile switching center, associated with a mobile station, to establish a call between the mobile station and a second party.
1. A method of performing an emergency call back with a mobile station, comprising:
sending a call back request from a call register associated with a public service answering point (PSAP) switch to another call register, the call back request requesting that a mobile switching center, serving the mobile station, establish a call between the mobile station and a public service answering point (PSAP).
2. The method of claim 1 , wherein the sending step sends a mobile station identifier and a routing number of the PSAP switch, associated with the PSAP, with the request.
3. The method of claim 2 , prior to the sending step, further comprising:
receiving the routing number for the mobile switching center and the identifier of the mobile station with an emergency call from the mobile station.
4. The method of claim 3 , further comprising:
creating a record in the call register associated with the PSAP switch if the emergency call is received.
5. The method of claim 1 , wherein the sending step performed by the call register associated with the PSAP switch, which is associated with the PSAP,is in response to a signal from the PSAP switch.
6. The method of claim 5 , further comprising:
accessing a routing number for a call register associated with the mobile switching center using a routing number for the mobile switching center received with the signal from the PSAP switch; and wherein
the sending step sends the request to the call register associated with the mobile switching center using the accessed routing number.
7. The method of claim 1 , wherein the call register associated with the PSAP switch, which is associated with the PSAP, sends the request to a call register associated with the mobile switching center.
8. A method of performing an emergency call back with a mobile station, comprising:
receiving, at a call register associated with a mobile switching center, a call back request from a call register associated with the PSAP switch; and
sending, in response to the call back request, a request to the mobile switching center that the mobile switching center establish a call between the mobile station and a Public Service Answering Point (PSAP).
9. The method of claim 8 , further comprising:
accessing a paging identifier for the mobile station based on a mobile station identifier received with the call back request; and wherein
the sending step send the paging identifier along with the request to the mobile switching center.
10. A public service answering point (PSAP) system, comprising:
a PSAP switch for handling emergency calls; and
a PSAP call register for routing a call back request from the PSAP switch to a mobile switching center which served an emergency call from a mobile station identified in the call back request.