System configuration of wireless pbx and communication method therefor

Abstract From the Canadian patent

A system configuration of wireless PBX (Private Branch Exchange) and communication method therefor with high user facility. In the system configuration of wireless PBX and communication method therefor, a specified telephone number is assigned to each portable radio telephone and also to each radio base station disposed at a predetermined area interval. Not only a person can issue a call by designating another subscriber to a portable radio telephone but also the, person can call an arbitrary subscriber to a portable radio telephone present near at an arbitrary radio base station.