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System and method for executing originating services in a terminating network for IMS and non-IMS applications

  • US 10,674,419 B2
  • Filed: 12/15/2015
  • Issued: 06/02/2020
  • Est. Priority Date: 03/02/2006
  • Status: Active Grant
First Claim
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1. A system, comprising:

  • a carrier gateway server acting as an IP Multimedia Subsystem (IMS) Session Initiation Protocol (SIP) application server communicatively coupled with an enterprise gateway server acting asa proxy, interrogation and serving call session control function used to route a session;

    wherein the carrier gateway server receives a terminating session request to route the session to a terminating subscriber;

    wherein the carrier gateway server is configured to route the terminating session request to an enterprise gateway server in an enterprise network;

    wherein the enterprise gateway server is configured toconvert the terminating session request to an originating session request prior to communicating with a private branch exchange (PBX) of the enterprise network,forward the originating session request to the PBX;

    wherein the PBX is configured toinvoke a call policy originating service which restricts where the terminating session request is permitted to be sent prior to the session being routed,responsive to the originating service having been performed, invoke a call policy terminating service as a destination service specific to the terminating subscriber;

    responsive to execution of the originating service and the terminating service, identify a destination associated with the terminating subscriber; and

    route the session to the destination.

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