Wide area cordless telephone system having means for avoiding do

Details Wide area cordless telephone system having means for avoiding do Wide area cordless telephone system having means for avoiding do

1988-04-04

1989-11-07

Lev, Robert

Telephonic communications

Audio message storage, retrieval, or synthesis

379 60, 455 33, H04Q 704

Patent

active

048797405

ABSTRACT:
A wide area cordless telephone system covers a service area which is divided into a plurality of local areas to each of which belong a plurality of home position cordless telephones having multi-channel access capability. A plurality of access units are provided in each local area to define a plurality of access zones. A pre-dialing switching stage is provided for each local area to establish a connection between the access units and line terminals of a telephone switching system. Signals sent from any cordless telephone are received by a nearby access unit and applied to the pre-dialing switching stage. Each telephone transmits a registration request upon a manual command and, on receiving a response identifying a local area, returns an acknowlegement to identify the same local area as identified by the received response. On receiving a registration request, the pre-dialing switching stage transmits a response identifying the own local area through an access unit and assigns a reserved line terminal of the telephone switching system to a non-home position telephone if it is identified by the received request. On receiving an acknowledgement, the switching stage makes a registration of a telephone if the acknowledgement from it identifies the same local area as identified by the response.

REFERENCES:
patent: 4456793 (1984-06-01), Baker et al.
patent: 4538029 (1985-08-01), Gazzoli et al.
patent: 4646345 (1987-02-01), Zdunek et al.
patent: 4658416 (1987-04-01), Tanaka
patent: 4672658 (1987-06-01), Kavehrad et al.
patent: 4731812 (1988-03-01), kerberg
patent: 4748655 (1988-05-01), Thrower et al.
patent: 4771448 (1988-09-01), Koohgoli et al.

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