Systems and methods for providing emergency callback procedures

摘要

Enhanced services, such as call restriction, call forwarding, anonymous call rejection, and proprietary services, may interfere with an emergency callback potentially preventing the callback from reaching the intended destination. Systems and methods for processing emergency calls to eliminate emergency callback failure in response to an emergency call being released are provided herein.

主权项

1. A method comprising:
receiving, by a gateway mobile switching center from a safety answering point, an emergency callback comprising a calling party number set to a number associated with the safety answering point and further comprising a calling party category set to an emergency service call category; processing, by the gateway mobile switching center, the emergency callback received in response to an unexpected release of an established emergency call between the 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 based at least in part on the emergency service call category of the emergency callback received from the safety answering point, 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.