JPS55100779A - Detection system for information on originating subscriber - Google Patents

Abstract

PURPOSE:To make it possible to know easily an originating subscriber's number of a malicious call from an incoming subscriber side, by committing that to a telephone office. CONSTITUTION:Information on a subscriber who wants to know originating subscriber's information is stored in detector 15 in each telephone office at a request of the subscriber. Once originating subscriber 8 dials the number of incoming subscriber 1 who wants to know received subscriber's information, this dial information is transferred from originating register 10 to detector 15 by way of marker 13 and translator 14 and after this dial is detected being of subscriber's 1, originating subscriber's information of subscriber 8 is stored in sender 12. A connection between subscribers 1 and 8 is made in the same way as usual, but at this time, the originating-subscriber's information of subscriber 8 is transferred from sender 12 to output device 5 by way of subscriber's trunk 2. When originating subscriber 1 wants to know the incoming information according to the call contents, the originating information in output device 5 is outputted by typewriter 6, etc., in the office by hooking, etc.