Method and apparatus for routing on hold calls

Details Method and apparatus for routing on hold calls Method and apparatus for routing on hold calls

2008-04-29

2008-04-29

Gelin, Jean (Department: 2617)

Telecommunications

Radiotelephone system

Zoned or cellular telephone system

C455S445000, C455S417000

Reexamination Certificate

active

10725661

ABSTRACT:
A wireless communication unit (101, 200), network switch (112, 300) and corresponding methods facilitate retrieval, routing, and management of on-hold calls (FIG. 5) within a first communication network (103) when the unit is operating in a second communication network (105) that is loosely coupled to the first. The communication unit comprises a transceiver (203) configured to support an air interface with the first and the second communication network; and a controller (209) arranged to cooperatively operate with the transceiver to retrieve an on-hold call from the first network via a call leg established to handout on-hold calls to and while the unit is operating in the second network. A user interface (211) facilitates management, connecting, disconnecting, etc., of the on-hold calls by the communication unit.

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R. Mahy, Internet Engineering Task Force, Internet Draft: “Using SIP for Peer-to-Peer Third Party Call Control,” Nov. 2000. (Document: draft-mahy-sip-peer-3pcc-00.txt).
M. Handley, et al. RFC 2543, “SIP: Session Initiation Protocol.”

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