Abstract
In the optical fibre distributed concentrator (OFDC) the subscriber line interface is extended to the proximity of remotely located subscribers. This is achieved by extending the local speech and signalling bus of a conventional digital concentrator through a network of remote terminals. The remote terminals are interconnected in an optical fibre network in a single or double loop configuration. The OFDC was designed to present a transparent interface from the concentrator to these remote terminals. This paper discusses ways of measuring the performance of both the switching and the transmission sections of the OFDC. >
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