PURPOSE: To make the maintenance and inspection work easy, through the display of state of use of each part, by providing a display monitoring the state of use for each of subscriber lines and outgoing registers of a wire telephone exchanger.
CONSTITUTION: The 1st∼Mth subscriber circuits 2,5,8∼ detecting the state of hook-off of a plurality of subscribers 1,4,7∼ and the 1st Nth outgoing registers 14,16∼ connected to an outgoing trunk 20 selected with the subscribers 1,4,7∼, an order trunk 21, and a paging broadcast trunk 22 are provided for a telephone exchanger. A crossbar switch 13 is provided between the registers 14,16∼ and the circuits 2,5∼ and the switch 13, the circuits 2,5∼ and the registers 14,16∼ are controlled with the CPU23. The circuits 2,5∼ and the registers 14,16∼ are respectively provided with the 1st∼Mth subscriber circuit display devices 3,6∼ and the 1st∼Nth outgoing register display devices 15,17∼, then the state of use of each part can be monitored with the display devices 3,6∼ and the display devices 15,17∼.
KUNIDA TSUTOMU
MATSUI TAROU
