Apparatus for providing dispatch service to an existing telephon

Details Apparatus for providing dispatch service to an existing telephon Apparatus for providing dispatch service to an existing telephon

1997-04-30

2000-02-15

Trost, William G.

Telecommunications

Radiotelephone system

Zoned or cellular telephone system

455466, 455520, H04Q 720

Patent

active

060262966

ABSTRACT:
A dispatch controller (103) located logically external to an existing telephone network (101) is coupled to the existing telephone network. When an originating communication device (e.g., 111) desires to initiate a dispatch call, the originating device transmits a call request to the existing telephone network, wherein the call request includes an identification (ID) of the originating device and a target address associated with the dispatch controller. The existing telephone network provides the call request to the dispatch controller. Upon receiving the call request, the dispatch controller retrieves dispatch-related information from a database (105) coupled to the dispatch controller based on the originating device's ID. Based on the retrieved dispatch-related information, the dispatch controller identifies a group of target communication devices (e.g., 107-110) for the dispatch call. The dispatch controller then generates and sends control signals to the originating device and the group of target devices via the existing telephone network to establish and manage the dispatch call.

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