System for communicating between internet protocol multimedia subsystem networks

摘要

A method that incorporates teachings of the present disclosure may include, for example, receiving an assignment to provide communication services to a communication device, supplying a first telephone number mapping system of a first internet protocol multimedia subsystem communication system with contact information of the communication device and a serving call session control function operating in the first internet protocol multimedia subsystem communication system, supplying a second telephone number mapping system of a second internet protocol multimedia subsystem communication system with contact information of the communication device and the serving call session control function, and receiving a session initiation protocol INVITE from an originating serving call session control function of the second internet protocol multimedia subsystem communication system for establishing communications with the communication device. Additional embodiments are disclosed.

主权项

1. A non-transitory machine-readable storage medium, comprising instructions, which when executed by a processor, facilitate performing operations comprising:
transmitting an assignment to a serving call session control function server operating in a first internet protocol multimedia subsystem communication system to provide communication services to a communication device, wherein the assignment is sent from a home subscriber server, and wherein a first telephone number mapping system of the first internet protocol multimedia subsystem communication system is supplied with contact information of the communication device and the serving call session control function server; and transmitting to a second telephone number mapping system of a second internet protocol multimedia subsystem communication system the contact information of the communication device and the serving call session control function server, wherein the first internet protocol multimedia subsystem communication system and the second internet protocol multimedia subsystem communication system are coupled to each other and are independently managed by a first service provider and a second service provider, wherein the second telephone number mapping system is supplied with an E.164 number and a first session initiation protocol uniform resource identifier each associated with the communication device and a second session initiation protocol uniform resource identifier associated with the serving call session control function server, and wherein the serving call session control function server retrieves authentication information to authenticate the communication device.