| 摘要 |
<p>The object of the present invention is to achieve in the telephone network a new type of procedure and system for call control and to meet a need observed recently in the telecommunication business for calls rated below normal tariffs especially between certain predeterminable subscriptions. The system of the invention does not require any substantial system changes in the telephone network. In addition, calls between predetermined subscriptions can now be rated according to a special tariff and the changes can be easily and flexibly included in the normal invoicing. When the number of subscriptions per customer is limited to two, the common call number for all customers is the same, e.g. 020100. When this number is dialled, the call is directed to the wired network subscription specified in the subscriber number pair, which is stored in a database, when the call is made from a mobile station, and vice versa. When the number of subscriptions connected to the system by a customer is greater than two the common call number comprises a prefix part which is the same for all customers and on the basis of which the telephone network exchange recognizes the service call of intelligent network calls and specially rated calls, and a suffix part which is an integer and which, via the intelligent network, determines the desired individual subscription among the subscriptions selected to be included in the system by the customer.</p> |
