TELEPHONE EXCHANGER

PURPOSE:To sufficiently fulfill the function of a microcomputer of an exchange, by providing a means of broadcast only for specific subscribers registrated in advance among a plurality of subscribers, and inhibiting indefinite subscribers from broadcasting at their disposal. CONSTITUTION:The 1st-Mth subscriber circuits 2, 5-11, detecting the off-hook of a plurality of subscribers, and a central control means controlling outgoing registers selected with the subscribers and crossbar switches are provided for a exchanger, and specific subscribers able to be selected with a paging broadcast trunk 22 is registrated to the central control means. A changeover switch 24 is connected to the trunk 22 and the broadcast audio of the subscribers is switched to a radio and a record of a special broadcast circuit 25 with the central control means and applied to an amplifier 26. The broadcast from the amplifier 26 is applied to only the specific subscribers registrated in the central control means via the circuits 2, 5-11, allowing to prevent the broadcast of subscribers not registrated at their disposal.