Signalling system for trunked private calls

Details Signalling system for trunked private calls Signalling system for trunked private calls

1986-09-17

1987-10-20

Lev, Robert

Telephonic communications

Audio message storage, retrieval, or synthesis

379 57, H04Q 701

Patent

active

047019441

ABSTRACT:
Disclosed is a signalling system wherein a private call initiating trunked subscriber enters a private ID number on an entry means. The trunked subscriber unit decodes the entered number and forms the ID code required to request a channel. The central controller receives the request and encodes an appropriate channel grant for a trunked private call. In another aspect of the present invention, the called subscriber unit may decode and display the ID of the calling subscriber.

REFERENCES:
patent: 4013843 (1977-03-01), Lupattelli et al.
patent: 4188508 (1980-02-01), Rogers et al.
patent: 4585904 (1986-04-01), Mincone et al.
patent: 4639723 (1987-01-01), Boughton
patent: 4642632 (1987-02-01), Ohyagi et al.
patent: 4644546 (1987-02-01), Doz et al.
patent: 4661974 (1987-04-01), Bales et al.

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