Door intercom system for use in house, has dwelling telephone device comprising radio module for producing radio link with cordless telephone, where dwelling telephone device is connected with door station

摘要

The system has a dwelling telephone device (16) connected with a door station (10) and a call tone loudspeaker (18) for signaling an operation of a bell button (12). A loudspeaker/microphone unit (20) is provided for speech and listening operation with the door station, and a door opener key (22) controls a door opener (24). The dwelling telephone device comprises a radio module (26) for producing a radio link with a cordless telephone e.g. radio subscriber (28).