Legacy user proxy call session control function

Details Legacy user proxy call session control function Legacy user proxy call session control function

2004-11-08

2011-10-11

Tsang, Fan (Department: 2614)

Multiplex communications

Pathfinding or routing

Combined circuit switching and packet switching

C370S354000, C370S355000, C370S356000, C455S435100, C455S445000, C709S223000, C709S225000

Reexamination Certificate

active

08036211

ABSTRACT:
A Legacy User Proxy CSCF (“L-CSCF”) provides multimedia services from a SIP based network to legacy access networks and devices. The L-CSCF includes a legacy service control state machine; a P-CSCF state machine and associated protocols; a mapping between a user's legacy network address and a corresponding network entry point; a database and logic for mapping between legacy user addresses and corresponding authentication data; legacy specific QoS control mechanisms; and an interworking function to handle incompatibilities between the legacy and SIP call models. The L-CSCF may be disposed logically between the legacy network and the multimedia network to translate and process communications such that legacy network and multimedia network devices need not require extensive modifications in order to support operation.

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