HP Surestore S10 Service and User Manual (Short- and Long-Wave) - Page 103

Reference • For the long-wave port, Hewlett-Packard recommends 9-micron single-mode fiber cable. • For ports 1 through 9, Hewlett-Packard recommends 50-micron multimode fiber cable for new installations but also supports 62.5-micron multimode fiber cable with SC-style connectors in existing installations. Cable Plant Specifications The cable plant includes losses of the fiber and splices and connectors (excluding those at the ends of the link that are accounted for in the transmitter and receiver specifications). Table 8 Cable Plant Specifications: Single-Mode (2 km-10 km, 100 MB/sec) Specification Units Value Fiber type Fiber core micron Single-mode; step index 9 (nominal) Fiber Bandwidth (1 km) Fiber Dispersion Return loss of cable plant with receiver connected MHz Ps/nm dB Not applicable < 35 > 12 Return loss of each individual connector or splice dB > 26 Cable plant loss dB < 6* * HP suggests that the loss of a new single-mode cable plant be limited to 6dB or lower in order to maximize the probability that the cable plant will permit 10- km operation with the majority of long-wave hubs (HP-UX servers only). Larger losses are permissible if the receiver power is greater than -17dBm. For new installations, HP recommends that the single-mode fiber be low-loss fiber equivalent to Corning's premium grade of their singlemode SMF-28 cable with loss of 0.35 dB/km or lower in order to more easily attain the required signal power at the receiver in spite of losses due to connectors and splices. Operating Requirements 101