Network Communications News (NCN) September 2016 - Page 23

fibre testing F E AT U R E A true test Christian Schillab of Fluke Networks believes it’s time for a smarter approach to OTDR bi-directional testing for fibre infrastructure. A lthough continuous fibre cable is recognised as a low loss material for high speed communications, the terminations at each access point are weak links that may result in loss or failure. While the biggest cause of signal loss across fibre optic connectors is contamination, poor installation practices in the pathways can also cause signal loss. For this reason, smart customers require fibre certification of all fibre optic cabling links. Basic Tier 1 tests determine insertion loss, length and polarity. When conducting Tier 1 testing, each fibre link is measured for loss and results are documented. This ensures that the fibre link exhibits less than the maximum allowable loss. Finer details Technicians now know if a fibre link passes or fails the instant they complete the bidirectional test. Enhanced fibre certification goes beyond Tier 1 testing using an OTDR to measure fibre perfor X[H[]Z[ [ܙX]\Hܘ\X[Yۘ]\BوHXx&\ۙ][ۈ[ۙ][ ]\\[HXH[[\ۙ[ŠXKۛXܜ[X\H[B]X[]HوH[[][ۈHYY[˜XܛX[]Y\[HXK[\\Y[\H]HXB\Y[[XYY\[[[][ۂ[XXXH\\HXYK[\YY\]H[[][ۈYY]™\Yۈ[\[HXYX][ۜ܂\[[]\H\X][ۜ˂[\[\ܝ[[Y]\][[][ۈ\\[[[H\]Y\HY\[HYYX\[܈]\H؛[\˂HXH[XXX[™[][ۜوXHXZ[X\[X\\H\\Yš[[][ۈ[][ۋ[ZHY\ H\\H&\›\[\H[\Y[XX[YX\\[Y[ˈH\\˜H[\]YHX[\X\\XوXB[\XHYX\\HˈHY\X܈[X[XH\]\[˰[XKY\]\Y[[\X[ۜ[Y[YH]\YX\B\K\8&X]\YY8&K[ۙ]YXYYHۛXܜ܂X]YXH[[X\H›XZHYX\\[Y[˂[]X]HH\ H\\BY\\\[Z]\][˜H[HوYۈHXKXœ]\Y[YXYY]\HYHXH[\B\XYH[]]HXZ]\[B܈XXYX\\[Y[ B[]H\HY\[B[YX\\\HYZ[X›ݙ\[YKHYHXZ]\\œYXYY]\YHH[B\[YHXKH\ܛ\\X]Y[[][ۜ˜\X]HHX]\YY][XX[][ۈ[HXK*[\\Yۈ[\[X]\[\[YH]]\ۜ\[Y]H[ˈ]]\[^\H\KYX\]Y\[X]\\ܛX[H\HZ^Y[H[H[H\ܝZ]\[ܙH܈\[]\XX[B\[ˈH[[[و\\܂\[ۈH\\X[ۋ\[˜HXH[[ۙH\X[ۈ[]BY\[\[\\Y\[B[YHXH[[H]H\X[ۋ]\HKY\X[ۘ[\[›܈\[H[وH[[]\Y[H\[\\]Z\Y ]\BۛH^H܈[X\][H[[XXHYX\\Hݙ\[܈H[˜[]\ۙ[˂[YH\Y\X]\HوHYۚYX[[YH[[Y[\[H[XXX[ٝ[H]B\]X[YH\XHH\[˜[[HۙH[YܙH[ݚ[H\[ [ܝ[][K\›Y]\ܚ[]\˜۝\H\[\[\XX\ˈX\][H\HXB[[\X[ۜH][[Z[ܙ]\[XZ[[Z\[]X[YX\\[Y[][ۜ\[˜\ˈ]]\XBY[H\[H[HۙH[YܙH[ݚ[H\\BXXX[\H[\HX]][ۙB\Hو\܈܈[\H\[[[XK]\XB\X\]H[YH[YH[\HHۙ]ܙ0H™X\]\\[HŒ‚LXH\[8$ZK[ ‚ ̌ M MN B