CORDLESS SLAVE UNIT INCOMING CALL CONTROL SYSTEM

摘要

PURPOSE:To shorten the required time from a simultaneous incoming call until all slave units are called as much as possible relating to the cordless slave unit incoming call control system in a key telephone set utilized with the cordless type slave units. CONSTITUTION:In the key telephone set constituted of a main equipment 1, plural connecting devices 2 to be connected to the main equipment 1 by a cable channel 5 and the cordless type slave units 3 for the equal to or more number of the connecting devices 2 to be connected to the respective connecting devices 2 by a radio channel 6 for which the respective slave units 3 in a non communicating state intermittently monitor incoming call signals transmitted from the main equipment 1 through the connecting devices 2 in a prescribed cycle, the main equipment 1 transmits the incoming call signals successively through the respective connecting devices 2 to the respectively corresponding slave units 3 when the simultaneous incoming call to all the slave units 3 occurs and monitoring period extending means 100 for extending the monitoring period for a predetermined period when the incoming call signals to the optional slave unit are detected during the monitoring are provided in the respective slave units 3.