Communication system interconnecting telephone line and single-f

Details Communication system interconnecting telephone line and single-f Communication system interconnecting telephone line and single-f

1995-07-11

1999-09-21

Bost, Dwayne

Telecommunications

Transmitter and receiver at same station

Radiotelephone equipment detail

455554, 455555, 455563, H04Q 720

Patent

active

059566507

ABSTRACT:
A communication system for performing bidirectional communications substantially simultaneously between a telephone line and a radio communication system by using a single-frequency carrier. A base station includes a first radio transceiver and a line connector disposed between the first radio transceiver and the telephone line. A terminal station includes a second radio transceiver. Each of the first and second radio transceivers has a control unit, a transmitter unit including a signal compressor, a synchronizing signal generator and a modulator, and a receiver unit including a signal expander. The control unit sets the line connector to an interconnecting state in response to a connection request signal from the telephone line or the terminal station, while establishes a communication enabling state between the telephone line and the terminal station during a connection processing period. After the communication enabling state has been set up, a speech enabling state is established between the telephone line and the terminal station. The connection processing period is changed over to a speech period after the communication enable state has been established, to thereby allow communication between the telephone line and the terminal station.

REFERENCES:
patent: 5121391 (1992-06-01), Paneth et al.
patent: 5159596 (1992-10-01), Itoh
patent: 5553079 (1996-09-01), Niki et al.
patent: 5557606 (1996-09-01), Moon et al.

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