System and method of providing private dispatch calling...

Details System and method of providing private dispatch calling... System and method of providing private dispatch calling...

2008-06-17

2008-06-17

Anderson, Matthew (Department: 2618)

Telecommunications

Transmitter and receiver at separate stations

Plural transmitters or receivers

C455S518000, C455S416000, C370S390000

Reexamination Certificate

active

07389120

ABSTRACT:
A dispatch communications system is disclosed that facilitates 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 in the first and second geographical areas. The dispatch communications system includes a first intra-area dispatch communications network to facilitate dispatch calling between subscriber units residing within a first geographical area; a second intra-area dispatch communications network to facilitate 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 dispatch calling between subscriber units residing respectively in first and second geographical areas. A call processing unit controls both inter-area and intra-area 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: 7116679 (2006-10-01), Ghahremani
patent: 7206595 (2007-04-01), Zufall
patent: 2003/0236093 (2003-12-01), Drotz et al.
patent: 2004/0002351 (2004-01-01), Upp et al.

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