Patent ID: 9559895
Date: 2017-01-31
CPC Classifications: H04L,H04W

Claim:
1. A method, comprising: receiving a communication request from an originating communication device, wherein the communication request includes a first codec, a terminating party identifier of a terminating party communication device, and an originating party identifier of the originating communication device; performing a telephone number mapping query, wherein the telephone number mapping query includes the terminating party identifier of the terminating party communication device and the originating party identifier of the originating communication device; receiving a failure notice of a failure of the telephone number mapping query; providing, to a breakout gateway control function system comprising a processor, the communication request responsive to the failure notice; providing, by the breakout gateway control function system, the communication request to a multiple systems coupling server, wherein the multiple systems coupling server downgrades the first codec to a second codec for circuit switched communications; determining, by the multiple systems coupling server, that packet-switched voice over long-term evolution communications is possible according to the originating party identifier of the originating communication device and the terminating party identifier of the terminating party communication device; upgrading, by the multiple systems coupling server, the second codec back to the first codec responsive to the determination that the packet-switched voice over long-term evolution communications is possible; and instructing, by the multiple systems coupling server, a call session control function device to initiate a communication session as a packet-switched communication voice over long-term evolution session between the originating communication device and the terminating party communication device responsive the determination that the packet-switched voice over long-term evolution communications is possible.