| 摘要 |
PURPOSE:To secure the assured decision for the termination-side charging by preparing the registering memory of the secret number for each subscriber, giving a collation between the collation number and the secret number when another subscriber has a request for the termination-side charging and then giving the permission to the subscriber when the coincidence is obtained through the collation. CONSTITUTION:Exchanges 3 and 4 to store dubscribers 1 and 2 plus repeating exchange 5 positioning between exchanges 3 and 4 are installed between subscriber 1 who is to receive the termination-side charging service and subscriber 2 having the service. At the same time, corresponding memory 6 is installed at the side of subscriber 2 for writing secret numbers a-c. Furthermore, outgoing trunk 7 and incoming trunk 8 plus outgoing trunk 9 and incoming trunk 10 are provided between exchanges 3 and 5 as well as between 5 and 4 each. Thus the error-free service is given to the subscriber. And with this method, the alteration of the exchange network is limited to the terminating station, the originating station and the repeater station, thus reducing the effect to other stations. |
