Communication control device capable of quickly searching for an idle speech channel in a standby mode in a cordless telephone system

Claim 1

A communication control device for use in connecting a plurality of cordless telephone sets to a subscriber line through a plurality of radio speech channels and a radio control channel, said communication control device comprising: switching means for switching said radio speech channels form one to another at a monitoring period; monitoring means for successively monitoring said plurality of the radio speech channels to detect whether or not each of the radio speech channels is put into an idle state and to successively produce an idle channel signal each time when the idle state of each radio speech channel is detected by said monitoring means; memory means coupled to said monitoring means for successively memorizing said idle channel signal at each radio speech channel; scanning means coupled to said memory means for successively scanning said memory means to count said idle channel signals memorized in said memory means and to produce a count signal representative of a count of said idle channel signals memorized in said memory means; and modifying means coupled to said scanning means and said switching means for modifying said monitoring period in accordance with said count signal and informing said switching means of said monitoring period which is modified by said modifying means.