WIRELESS PRIVATE BRANCH EXCHANGE, ESPECIALLY CONCERNED WITH ADDING A WIRELESS COMMUNICATION FUNCTION TO A PRIVATE BRANCH EXCHANGE AND REPLACING TELEPHONE TERMINALS, WHICH INTERNAL USERS USE, WITH WIRELESS PHONES

摘要

PURPOSE: A wireless PBX(Private Branch eXchange) is provided to increase work efficiency by installing an unattended automatic information system and to process urgent contact and business through a VMS(Voice Mail Service) function and an automatic connection function to an appointed phone. CONSTITUTION: If a ring signal is transmitted through a trunk line(6) according to an external caller's call request, an input-output control system(5) detects the ring signal and informs a control part through a matrix circuit(1) that there is a call. The control part(2) requests a processing part(3) to transmit an announcement. At the same time, the control part(2) changes the connection line of the matrix circuit(1) so as to be connected to the processing part(3). The processing part(3) searches for the digital announcement data stored in a storage part(8) and provides the searched announcement data to the external caller's telephone terminal through the input-output control system(5) via the changed connection line of the matrix circuit(1). The external caller selects a desired extension number according to the received announcement.