ISDN SUBSCRIBER SYSTEM AND MOBILE TELEPHONE SYSTEM

摘要

PURPOSE:To attain 2-way connection and to abort the distinguishment between a subscriber's cordless telephone set and an outdoor portable telephone set by controlling an incoming call service area with the presence of a dummy code of an ISDN number section. CONSTITUTION:An ID code of a mobile telephone set is given as an ISDN address comprising an ISDN number part and a subaddress number part, and part or all of a country number part, a relay station number part, a subscriber number part and a subscriber line number part forming the ISDN number part is replaced with a code to be identified from a dummy code through a network. Then an exchange discriminates to which pager a call signal is to be sent through digit analysis depending on the presence of the dummy code. Thus, the two-way connection is attained even with simple constitution at a low cost and the distinguishment between a subscriber's cordless telephone set and an outdoor portable telephone set is aborted.