Methods and systems for late call forwarding when roaming from G

Details Methods and systems for late call forwarding when roaming from G Methods and systems for late call forwarding when roaming from G

1997-11-26

2000-10-24

Urban, Edward F.

Telecommunications

Radiotelephone system

Special service

455432, 455445, H04Q 722

Patent

active

061380075

ABSTRACT:
Disclosed is an apparatus for and a method of providing late call forwarding when a dual mode GSM/IS41 type mobile station has roamed from its home GSM network to a North American IS41 type cellular network. The GSM network functionally supports the GSM Optimal Routing technical specification whereby the address of the gateway GSM MSC is supplied to the interconnected IWU. When the IWU receives a redirect request from the terminating IS41 MSC (MTSO) upon failure to connect to the roaring MS, the IWU tells the GSM originating gateway MSC to resume call handling. The originating gateway MSC then completes the late call forwarding process using the call forwarding number as a forwarding address.

REFERENCES:
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patent: 5526400 (1996-06-01), Nguyen
patent: 5826191 (1998-10-01), Krishnan
patent: 5862481 (1999-01-01), Kulkarni et al.
patent: 5867784 (1999-02-01), Lantto
patent: 5884180 (1999-03-01), Bertacchi
patent: 5933784 (1999-08-01), Gallagher et al.
patent: 5978673 (1999-11-01), Alperovich et al.

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