Abstract: An apparatus for selectively answering an incoming call transmitted from a cellular base station to a mobile station based upon the telephone number of a calling party. An ID processor is programmed by a user of the mobile station to store selected telephone numbers corresponding to calling party telephone numbers, which serve to uniquely identify the calling parties. The processor is also programmed by the user to select predetermined response categories and to assign desired ones of those response categories to each of the stored calling parties' telephone numbers. When an incoming call is received at the mobile station, the calling party's telephone number is compared with the stored telephone numbers, previously programmed by the user, to detect an incoming call from a particular calling party. Depending upon the response category assigned to incoming calls from that particular calling party, the selected response is initiated.

Abstract: It is desirable that a cordless telephone system include a single base unit and at least two remote handunits. With such a system, two users may maintain participation in a three-way conversation while being free to move about within reasonable transmitting distance to and from the base unit. Circuitry is provided in which the signal received from one handunit is transmitted to the other handunit, and sidetone from one handunit is transmitted back to that handunit. The base unit comprises first and second double conversion intermediate frequency arrangements with respective first IF frequency portions being tuned away from a nominal frequency value by a substantially equal amount in opposite directions.