Broadband integrated subscriber loop system

US4686667A · kind A · utility

Assignee

• Standard Elektrik Lorenz AG · DE

Inventor

• Horst Ohnsorge · Freiberg, DE

Key dates

• Filing date: Feb 1, 1985
• Grant date: Aug 11, 1987
• Expiry date: Feb 1, 2005

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04J2203/0089
• WIPO field: Telecommunications
• WIPO sector: Electrical engineering

Abstract

A broadband integrated subscriber loop system is provided in accordance with the teachings of the present invention. A system is provided in which the subscribers are combined in groups (T1n1-T1n10) each of which is supplied via a single optical communication link. Over the optical waveguide (LWL) of this optical communication link, signals of the channels assigned to subscribers for various telecommunication services are transmitted on a multiplexed basis from the switching unit to an interface unit closely located to the subscribers of the group. In the interface unit the channels are separated and subscriber-assigned multiplexers (Mux 5) combine the channels assigned to a subscriber in accordance with the transmission capacity required into a subscriber time-division-multiplex signal. This signal is transmitted over a subscriber line in the form of a coaxial electric line (KL 1) to subscriber's taps, where the signals for terminals located at the top are separated via demultiplexers (Demux 3, Demux 4, Demux 5, Demux 6). Signals to be transmitted from a subscriber's terminals to the switching unit are combined in digital form (Mux 2, Mux 3, Mux 4), and a multiplexer (Mux 1) in th…