Digital communication electrical/optical access node having buffer memory matrix for switchable multi-channel bidirectional transmission

US5214638A · kind A · utility

Assignee

• Alcatel N.V. · NL

Inventors

• Albert Norz · Gerlingen, DE
• Albrecht Schaffert · Gerlingen, DE
• Werner Beisel · Ludwigsburg, DE
• Kalman Szechenyi · Löwenstein, DE

Key dates

• Filing date: Nov 8, 1990
• Grant date: May 25, 1993
• Expiry date: Nov 8, 2010

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04Q11/04
• WIPO field: Telecommunications
• WIPO sector: Electrical engineering

Abstract

The network access node of a digital communication system for the bidirectional transmission of message signals between, for example, a switching center and subscribers as an electrically switchable connection between the lines to the switching centers with a first interface and the lines to the subscribers with a second interface. The first interface is preferably an interface for a time-division multiplex signal with a transmission rate of 2 Mbit/s; the second interface is preferably an interface for signals in multiple access with time-division multiplex (TDM/TDMA). The buffer memory of the TDM/TDMA system is made up of partial memories arranged as a matrix. The partial memories are used simultaneously as a buffer memory for the circuit of the paths.