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

H - Electricity

04

M

379/11

H04M 1/00 (2006.01) H04M 1/725 (2006.01)

Patent

CA 1204235

WIRELESS TELEPHONE SYSTEM WITH HIGH LEVEL DIAL PULSE SIGNALLING ABSTRACT OF THE DISCLOSURE A wireless extension telephone system includ- ing a base unit connected to a telephone line and a re- mote 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 re- ceiver, 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.

443377

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