Centrally controlled telecommunications exchange system

US4899336A · kind A · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Hans-Joachim Baur · Echterdingen, DE
• Hans Bittermann · Schwanau, DE

Key dates

• Filing date: Jun 1, 1988
• Grant date: Feb 6, 1990
• Expiry date: Jun 1, 2008

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04Q11/0407
• WIPO field: Telecommunications
• WIPO sector: Electrical engineering

Abstract

In a telecommunications exchange system, consisting of a central section comprising a central switching network and a central coordination processor, and consisting of line trunk groups which are connected to the switching network via allocatable connection paths and which each comprise a subsidiary switching network and a subsidiary control unit, between the coordination processor on the one hand and each of the subsidiary control units on the other hand, a control channel exists via which the former at all times has access to each of the latter. With the start-up of an entire exchange system or only of individual line trunk groups, the coordination processor loads the subsidiary control units with items of switching orientated program information and with items of connection state data individually assigned to the individual subsidiary switching network terminals, which can consist of subscriber terminals and connection line terminals. On start-up the items of connection state data are transmitted individually in respect of each subsidiary switching network terminal, and in each case only when an incoming or outgoing connection establishment takes place via the respective subsidi…