Converting telephone system for closed number and opened number

Abstract

Abstract PURPOSE:To achieve mutual over ride between networks within or outside areas, by changing a call with a closed number into an opened number, through the provision of an area number adding means with an exchanger for in-area talking connection. CONSTITUTION:A register sender SR storing information is connected to an output side of a switch frame SW of an exchanger of in-area talking connection. A subscriber SUB dials a number 73-1111 being a closed number and stored the number to the sender SR of the frame SW. When this sender SR enters a closed number operation network 1' or 2', an area, number 427 of itself is added and the number 427-73-1111 is sent to the number operation network. Thus, by adding the area number 427, the in-area network 2 is used with a call (a) in the in-area network 1, it is connected with the network 1', allowing mutual override between the networks 1 and 2.

Inventors

• 👤 Teruo Itakura

Bibliographic Details