Call connection control method in exchange

Abstract

Disclosed is an exchange which performs call connection control for subscribers in a plurality of areas having different toll numbers, and a method of controlling connection of calls in this exchange. A telephone number translation table is created in accordance with a telephone number structure comprising an internal toll number and internal local office numbers, wherein the internal toll number is a string of numerals shared by toll numbers in the plurality of areas, and the internal local office numbers are numbers obtained by adding a number, which is not shared by the toll numbers in the plurality of areas, onto the beginning of local office numbers that follow the unshared number. The exchange performs switching service control using the telephone number translation table.

Description

technical field [0001] The invention relates to a call connection control method in an exchange. In particular, it relates to a switch which performs call connection control for subscribers in a plurality of areas with different long-distance area codes, and also to a method for carrying out call setup in such a switch. Background technique [0002] In sparsely populated areas, the number of telephone users accommodated by a long-distance area code is small compared to that accommodated by a city. Therefore, due to the added expense of using a switch for each long distance area code, it has been sought to use a single switch to control multiple long distance area codes through a remote hub or similar device. However, the following problems arise when using a single exchange to control multiple long-distance area codes: [0003] 1) If a switch with only one toll area code control function is used to provide the control functions of multiple toll area codes, it will require ...

AI Technical Summary

Problems solved by technology

[0004] 2) For a service call based on a special service number (to the police station or fire brigade, etc.), the previous technology is to ignore the long-distance area code area that sends the call, and just terminate the call at a centralized special service number receiving center, and cannot Terminate the call at a dedicated service number receiving center located in the same region as the caller

[0017] Therefore, in the case where multiple long-distance area code areas are controlled by a single switch, the previous technology required large-scale memory and large-scale changes to software

[0018] In addition, if the caller and the centralized special service number reception center cannot communicate, a problem occurred in the prior art that the call from the caller cannot be terminated at the special service number reception center in the same area

[0019] In addition, although some users want to receive different services with the same service number, the previous technology cannot meet this need

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