Networks Europe Jul-Aug 2018 | Page 37

37 FIBRE OPTIC CABLING Fig. 1 Typical MTP Cassette & Trunk Configuration total of ten optical connectors and five sections of cable so it’s imperative to minimise losses at each connection point. This will ensure that your network will function as planned. While this style has more connection points, it does provide the best combination in terms of the highest density, modularity, flexibility, versatility and significantly reduced installation times. The maximum loss expectation for a standard grade LC connector which is often the cassette’s front interface is 0.50dB, but typical around -0.30dB. For an MPO connector, the losses are higher at a maximum of -0.75dB. Whereas a high grade, low loss system will produce a LC connector at -0.20dB, with a typical around -0.10dB and an MPO/MPO connector at a maximum of -0.35dB. Now compare these channel loss numbers to those allowed in Fig. 2 and it becomes immediately apparent that there is very likely to be an issue at 10GBase, let alone SR4 and SR10. High Grade MPO/MTP® Elite/LC Channel Loss OM3 LC Interface -0.20dB à Cassette à MPO Interface -0.35dB à 100m OM3 cable (-0.30dB) à Cassette à MPO Interface -0.35dB à LC Interface -0.20dB = -1.40dB OM4 LC Interface -0.20dB à Cassette à MPO Interface -0.35dB à 150m OM4 cable (-0.45dB à Cassette à MPO Interface -0.35dB à LC Interface -0.20dB = -1.55dB Standard Grade MPO/LC Channel Loss OM3 LC Interface -0.5dB à Cassette à MPO Interface -0.75dB à 100m OM3 cable (-0.30dB) à Cassette à MPO Interface -0.75dB à LC Interface -0.50dB = -2.80dB OM4 LC Interface -0.5dB à Cassette à MPO Interface -0.75dB à 150m OM4 cable (-0.45dB) à Cassette à MPO Interface -0.75dB à LC Interface -0.50dB = -2.95dB Challenging the Edge: The “Data Centre in a Box” concept enables equipment to be deployed in non-traditional Data Centre environments. „ „ „ „ IT INFRASTRUCTURE TS-IT rack platform Demand-orientated climate control System monitoring Intelligent power rails SOFTWARE & SERVICES www.rittal.co.uk