Method and device for connecting special automatic small exchange of complex business digital net and city telephone exchanger

Abstract

A method for interface an IPABX and a local exchange includes the steps of: processing a call originated from an IPABX by a local exchange having one discernible individual by binding a plurality of data transmission lines, that is, a data transmission line trunk group; and processing a call destined to the IPABX through the local exchange. Since the directory number can be managed by a group name, stepping up from the method for fixing the directory number to the line, the expense for the line can be reduced. In addition, the problem of separation between the origination line and the destination line as in the conventional method that the trunk line and the PRI line are together used is settled. Moreover, since there is no need to allocate an additional signaling point, an expense possibly incurred for the allocation of a signaling point and consumption of the signaling point resource can be prevented.

Description

Technical field [0001] The present invention relates to a method and device for connecting an integrated service digital network (ISDN) private automatic branch exchange (IPABX) and a local telephone exchange, more specifically, to an IPABX and a local telephone exchange using a primary rate interface (PRI) line Connection method and device. Background technique [0002] Generally, a basic rate interface (hereinafter referred to as "BRI") and a primary rate interface (hereinafter referred to as "PRI") lines are used for ISDN subscriber line services. [0003] BRI provides users with two 64Kbps B-channels and one 16Kbps D-channel, while PRI provides users with "n" B-channels (64Kbps) and one D-channel (16kbps), of which 23B+ is used in North America D interface, and a 30B+D method is used in Europe. [0004] Although the PRI line has high economic efficiency and line efficiency compared with the BRI line, the PRI line has the following problems. [0005] There are usually two ways...

AI Technical Summary

Problems solved by technology

[0019] In the case of independently assigning a local number to a specific local IPABX, number resources may be consumed

In addition, even in the case where a call is terminated using a subscriber number destined for IPABX, the capacity of a number translation database is increased, thereby necessarily limiting the number of directory numbers that can be provided to a local exchange

[0020] Also, since call progress is not controlled (barred or allowed) by the channel of the PRI line, it is difficult to maintain and repair the line

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