Method and apparatus for interfacing a cellular fixed wireless terminal to the extension side of a pbx/pabx

Abstract

A private branch exchange (PBX/PABX) is provided with a fixed wireless terminal, which allows both incoming and outgoing calls to be made on the private branch exchange. The fixed wireless terminal is coupled to the private branch exchange via an interface unit connected to one of the analog extension lines of the private branch exchange. A telephone extension serviced by the PBX/PABX places a call to a remote cellular telephone, or a remote cellular telephone user places a call to the telephone extension. When the PBX-user makes a call to a remote cellular telephone, one picks up a local PBX/PABX extension, and hears a dial tone, signifying that the PBX/PABX is ready to service his call. The caller then dials the directory number of the PBX/PABX extension which is provided for cellular calls. The PBX/PABX then automatically connects the caller to the cellular extension, which is the interfaced fixed wireless terminal. The caller then dials the directory number of the remote cellular telephone, and waits for connection. When a remote cellular telephone user calls the fixed wireless terminal interfaced to the PBX/PABX, he simply dials the cellular directory number of that fixed wireless terminal in the usual manner. When the fixed wireless terminal answers, the caller will hear the dial tone of the interfaced PBX/PABX, signifying that the PBX/PABX is ready to service his call. The remote caller then dials the extension on the PBX/PABX for the party to whom he wishes to speak, and is then connected.