Patent ID: 6717939
Filing Date: 2004-04-06
Classification: H04L,H04Q

Abstract:
A method of call setup in a telecommunication network having a packet network and a circuit network comprising the steps of:transmitting call origination information from a virtual transport server to a packet circuit gateway in response to the virtual transport server receiving a circuit identification code from a telephonic switching device coupled to the circuit network; wherein the virtual transport server includes a redundant virtual transport server; conveying the call origination information and the virtual circuit routing information to another virtual transport server from the virtual transport server in response to the virtual transport server receiving the virtual circuit routing information from the packet circuit gateway; receiving another circuit identification code at the other virtual transport server from another packet circuit gateway in response to the other virtual transport server transmitting the virtual circuit routing information to the other packet circuit gateway; sending the call origination information and the other circuit identification code from the other virtual transport server to another telephonic switching device; sharing the processing of call setup between the virtual transport server and the redundant virtual transport server; and aliasing a point code assigned to the virtual transport server at the redundant transport server.