TELEPHONE APPARATUS WITH A FIXED TELEPHONE STATION COUPLED TO A MOBILE AND DETACHABLE HANDSET

摘要

A telephone apparatus, such as a public telephone, in which a voice and tone signals transmitting medium between a fixed station connected to a telephone line and a handset detachable from the station is free of disturbance. A modulation circuit for transmitting voice and tone signals from the telephone line to the handset and a demodulation circuit for transmitting voice signals from the handset to the telephone line are included in the station and are connected respectively to a demodulation circuit connected to an earphone of the handset and to a modulation circuit connected to a microphone of the handset, via two low frequency magnetic coupling means. The circuits contained in the handset are remote supplied by a power supply circuit included in the station, via third magnetic coupling means.