RADIO PRIVATE BRANCH OF EXCHANGE AND RADIO COMMUNICATION SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide the radio private branch of exchange and the radio communication system where a mobile set (PS) in a private area is directly accessible to a public PHS network when part of an enterprise using the private branch of exchange is within an area of the public PHS in the area of the private PHS and at the outside of the area of the public PHS covering a base station connecting to the private branch of exchange. SOLUTION: A relay CS 18 is installed in a service area 131 of a public CS 13 and is operated for the public CS 13 as if it were three public PS. A PS 19 is accessible to other PS 19 in a same enterprise 15 and is directly accessible to a public PHS network 12 via a private CS 17, a private branch of exchange 16, the relay CS 18 and the public CS 13 within an area of a private CS 17 even at the outside of the service area of the private CS 17 from a place anywhere the enterprise 15.