HP StorageWorks 4000/6000/8000 .HP StorageWorks SAN Design Reference Guide, Pa - Page 169

bandwidth and higher bandwidth fiber optic cable. Nominal specifies modal bandwidth of 500 MHz-km at 850 nm for 50 micron fiber optic cable (type OM2), and 200 MHz-km at 850 nm for 62.5 micron fiber optic cable (type OM1). Higher specifies modal bandwidth of 2000 MHz-km at 850 nm for 50 micron fiber optic cable (type OM3). Table 74 through Table 78 list the maximum loss budgets for different interconnect speeds at specific distances. Table 79 through Table 82 and Table 85 and Table 86 list the maximum supported distances based on switch-to-switch (ISL) or device-to-switch connectivity. NOTE: The following tables do not specify media losses due to variances between different fiber optic cable manufacturers. In all cases, the maximum loss budget is the total channel insertion loss, which includes media losses based on the indicated fiber optic cable bandwidth. HP supports the use of optical fiber patch panels. The total channel insertion loss between the transmitter and receiver for the cable segment routed through the patch panel must not exceed the maximum listed for the connector and cable type. NOTE: Channel insertion loss is the combined passive loss from connectors, splices, and media between the transmitter and receiver. A mated connector pair is defined as a device or switch transceiver-to-cable connection, or a cable-to-cable connection when using a passive coupler in a patch panel. A typical (nonpatch panel) installation has two mated pairs per cable segment (one for each end of the cable). Additional mated connector pairs are allowed between two transceivers, provided the total loss of all connectors and cables does not exceed the total channel insertion loss. Table 72 lists the 8 Gb/s fiber optic cable loss budgets when using nominal bandwidth OM1 or OM2 multi-mode fiber optic cable. Table 72 8 Gb/s fiber optic cable loss budgets (nominal bandwidth) Cable Maximum distance per Total channel insertion Maximum loss per cable segment loss mated connector pair 50/125 micron (OM2 500 MHz-km at 850 nm) 50 m 1.68 dB 62.5/125 micron (OM1 200 MHz-km at 850 nm) 21 m 1.58 dB 0.75 dB 9/125 micron (singlemode) 10 km 6.4 dB1 1This number assumes use of low-loss fiber optic cables for 8 Gb/s speeds. Table 73 lists the 8 Gb/s fiber optic cable loss budgets when using higher bandwidth OM3 multi-mode fiber optic cable. SAN Design Reference Guide 169