System and method of providing group dispatch calling...

Telecommunications – Transmitter and receiver at separate stations – Plural transmitters or receivers

Reexamination Certificate

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Details

C455S416000, C455S518000, C370S390000

Reexamination Certificate

active

10889092

ABSTRACT:
A dispatch communications system is disclosed that facilitates group dispatch communications respectively between subscriber units residing within a first geographical area, subscriber units residing within a second geographical area, and subscriber units residing respectively within the first and second geographical areas. The dispatch communications system includes a first intra-area dispatch communications network to facilitate group dispatch calling between subscriber units residing within a first geographical area; a second intra-area dispatch communications network to facilitate group dispatch calling between subscriber units residing within a second geographical area different than the first geographical area; and an inter-area dispatch communications network to facilitate group dispatch calling between subscriber units residing respectively within the first and second geographical areas. A call processing unit controls both inter-area and intra-area group dispatch calls for the dispatch communications system.

REFERENCES:
patent: 5689810 (1997-11-01), Shaughnessy et al.
patent: 6640109 (2003-10-01), Drozt et al.
patent: 2003/0236093 (2003-12-01), Drotz et al.
patent: 2004/0002351 (2004-01-01), Upp et al.
patent: 2006/0052126 (2006-03-01), Choksi
International Search Report for PCT/US05/24596 dated Aug. 28, 2006.
Written Opinion of the International Searching Authority for PCT/US05/24596 dated Aug. 28, 2006.

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