Patent ID: 6967972
Filing Date: 2005-11-22
Classification: H04Q

Abstract:
1. A method of operating a telecommunications service for a telecommunications network comprising a first telephone set, a private branch exchange (PBX), a protocol conversion engine, a switch in a voice network, and a second telephone set, the method comprising the steps of: receiving a plurality of dialed digits from the first telephone set at the PBX; receiving, at the protocol conversion engine, a first call initiation message formatted according to a first protocol used by the PBX, wherein the first protocol is different from a second protocol used by the switch; instantiating, in the protocol conversion engine, a call instance for a call from the first telephone set to the second telephone set, wherein the call instance comprises: converting, using the originating call control, universal call model, terminating call control, and call context data, the first call initiation message into a second call initiation message that conforms to the second protocol, by inter-working the first call initiation message according to one or more inter-working rules; and communicating the second call initiation message to the switch, to result in setting up the call.