Patent ID: 8886154
Filing Date: 2014-11-11
Classification: H04M,H04W

Abstract:
1. A method, comprising: processing, by a gateway mobile switching center, an emergency callback, received in response to an unexpected release of an established emergency call between a safety answering point and a mobile device, to reestablish communication between the safety answering point and the mobile device; issuing, by the gateway mobile switching center, a special use send routing information message to a home location register, the special use send routing information message comprising a call-blocking parameter to suppress call-blocking features enabled for a calling party of the established emergency call, the call-blocking features comprising a call restriction service, a bar all incoming calls service, and an anonymous call rejection service; processing, by the gateway mobile switching center, a special use send routing information acknowledgement message received by the gateway mobile switching center from the home location register in response to the special use send routing information message comprising the call-blocking parameter, the special use send routing information acknowledgement message comprising a mobile station roaming number obtained from a mobile switching center; and routing, by the gateway mobile switching center, the emergency callback to the mobile device based upon the mobile station roaming number included in the special use send routing information acknowledgement message received from the home location register.