Wireless telephone system with high level dial pulse signalling

Details Wireless telephone system with high level dial pulse signalling Wireless telephone system with high level dial pulse signalling

1982-12-16

1984-08-28

Rubinson, G. Z.

179 2E, H04Q 704

Patent

active

044685386

ABSTRACT:
A wireless extension telephone system including a base unit connected to a telephone line and a remote extension unit. Both base and remote units each include a radio receiver and a radio transmitter. Also included in the remote unit is a modulator connected to the radio transmitter and circuitry limiting the amplitude of modulated signals produced by said transmitter. A dialing circuit connected to the modulator causes the amplitude of each outgoing signal representing a dial pulse to be transmitted at a level substantially higher than when no dial pulses are present. At the base unit a dial pulse detection circuit differentiates between the modulated signals received by the associated radio receiver, providing connections to the telephone line in response to signals of a first amplitude and breaking the line in response to each received pulse of a higher level amplitude.

REFERENCES:
patent: 2129332 (1938-09-01), Mastini
patent: 3193623 (1965-07-01), Burns et al.
patent: 4039760 (1977-08-01), Gregory et al.
patent: 4213009 (1980-07-01), Suzuki
patent: 4291197 (1981-09-01), Yonaga

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