Digital radiotelephone system

Details Digital radiotelephone system Digital radiotelephone system

1995-03-07

1996-11-05

Safourek, Benedict V.

Multiplex communications

Wide area network

Packet switching

379 58, 455 381, H04Q 730

Patent

active

055725317

ABSTRACT:
A digital radio telephone system for establishing communications between a main unit and a sub unit and between a plurality sub units. The system includes a main unit and a plurality of sub units. In order to establish communications with a sub unit, a calling signal including the sub unit extension number is first sent through the main unit to the sub unit. If the sub unit corresponding to an extension number in the calling signal is available, a calling acceptable signal is transmitted by the sub unit. The main unit includes an extension number multiplexer which multiplexes a plurality of sub unit extension numbers into one calling signal. Therefore, a calling signal from the main unit and calling signals from a plurality of sub units are multiplexed (combined) into a single calling signal. The main unit need only transmit a single multiplexed calling signal instead of a plurality of individual calling signals to each sub unit.

REFERENCES:
patent: 4542262 (1985-09-01), Ruff
patent: 4635285 (1987-01-01), Coombes
patent: 4646345 (1987-02-01), Zdunek et al.
patent: 4649567 (1987-03-01), Childress
patent: 4748655 (1988-05-01), Thrower et al.
patent: 4776000 (1988-10-01), Parienti
patent: 4953198 (1990-08-01), Daly et al.
patent: 5390360 (1995-02-01), Scop et al.

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