V02501P591interface unitMultiplexer Multiplexer orxDSL modemMultiplexer orxDSL modemG.703 V.35 X.21850 nmmultimodeoptical fiberP592interface unitP593interface unit850 nmmultimodeoptical fiber850 nmmultimodeoptical fiberMultiplexer Multiplexer orxDSL modemMultiplexer orxDSL modemG.703 V.35 X.21P591interface unitP592interface unitP593interface unit850 nmmultimodeoptical fiber850 nmmultimodeoptical fiber850 nmmultimodeoptical fiberFigure 257: Interfacing to PCM multiplexersNote:P59x interface units should be mounted as close as possible to the telecommunications equipment to minimise interferenceon the electrical connections.3.1.6.2.1 INDIRECT CONNECTION - FIBRE (IEEE C37.94)An 850 nm fibre-optic interface can connect directly to a multiplexer supporting the IEEE C37.94 standard. 850 nmmulti-mode optical fibres, either 50/125 mm or 62.5/125 mm are suitable. BFOC/2.5 type fibre optic connectors areused.P446SV Chapter 19 - Fibre TeleprotectionP446SV-TM-EN-1 483
