Importance

Loading Importance Indicators...

Abstract

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.

Loading the Abstract Image...

First Claim