British Telecommunications Public Limited Company

British Telecommunications Corporation

David W Faulkner

Andrew R Cook

Philip John Smith

Dianne M Russ

Peter Healey

Donald E Clarke

John W Ballance

Michael A Hale

Ian D Henning

Phillip J Smith

David I Fordham

Alistair Hutcheon

The present exemplary embodiment relates to a remote powered node for a hybrid fiber-copper network. The node may be powered using the dormant copper pair(s) linking the node to the telephone exchange to carry a ringer current. The ringer current can be controlled to power all the electrical load of the node. Alternatively, the ringer current may power all of the components common to all customers served by the node, with the customers feeding power to their customer specific components via a UTP cable.

Remote powered node

Access network

Distributive communications network

Monitoring system

Optical coupler

Distribution of digitized composite AM FDM signals

Method of synchronizing the pseudo-random binary sequence in a

Optical networks

Optical communications systems

Control of optical systems

Method of communicating digital signals and receiver for use with such

Regenerative node for a communications network

PCM signal coding

Optical broadcast network

A node of an optical transmission network, for example a local area network, has a combined by-pass switch and optical modulator. The by-pass switch and modulator (45) comprises an optical switching matrix with two non-intersecting waveguides (W1, W2) connected by a further waveguide (W3). The junctions between the non-intersecting waveguides and the further waveguide perform both modulation of an optical carrier signal and re-routeing of the transmission path along the network.

Optical signal network with node by-pass switching capability

Growing community of inventors

Ipswich, United Kingdom

David W Faulkner