Hitachi Telecom Technologies, Ltd

Hiroki Yabe

Kenichi Takahashi

Hideo Kobayashi

A local networking system includes a memory to store local address numbers of registered local terminals; a specified number checking unit to check, when the system receives a first dial number from an unregistered local terminal, whether the first dial number is the same as a specified number; a registration checking unit to receive, when the first dial number has been found to be the same as a specified number, a second dial number from the unregistered terminal, and to check whether a local address number corresponding with the second dial number is stored in a memory; a non-registration checking unit to receive, when such a local number has been found to be stored in memory, a third dial number from the unregistered terminal and to check whether a local address number corresponding with the third dial number is stored in memory; and a registration unit to allocate, when a local address number corresponding with the last third dial number is not stored in memory, the third dial number to the unregistered terminal as its local address number, and to store the third dial number in memory.

Local networking system for registering unregistered terminals

Each of ISDN extension terminals which are connected in a point-multipoint connection mode transmits call initiation information while identification information thereof is contained in the call initiation information when a call is initiated: a private branch exchange includes a main memory for storing a table representing the corresponding relationship between the extension number and service class information, and a central processing equipment for searching the service class information corresponding to the extension number contained in call initiation information from the table when the call initiation information is received from an extension, and performing call processing in accordance with the service class information thus searched, whereby even when a plurality of extension terminals are connected to an exchange in the point-multipoint connection mode, the service class management can be performed for every extension terminal.

Growing community of inventors

Koriyama, Japan

Hiroki Yabe