US Patent 10148703 Service capabilities in heterogeneous network

In some implementations, a telecommunications network can include a core network device. The core network device can receive from a session-originating device an initiation request of a communication session, the initiation request including information of a destination and information of media capabilities. The core network device can determine network-location information of the destination, retrieve from a capability registry modification information corresponding to the network-location information, and modify the information of the media capabilities based at least in part on the modification information. The core network device can transmit the initiation request including the modified information of the media capabilities to another core network device corresponding to the network-location information. The core network device can also determine that the information of the one or more media capabilities does not correspond to the retrieved capability information and transmit a session-failure indication to the session-originating device.