HP StorageWorks 2/140 FW 08.01.00 McDATA Products in a SAN Environment Plannin - Page 209

Physical Planning Considerations 5 When using multimode cable, note the decrease in performance as the cable core diameter or data transmission rate increases. When using singlemode cable, performance is a function of transceiver type. Data transmission distance and link budget are not affected by data transmission rate. Table 5-1 Cable Type and Transmission Rate versus Distance and Link Budget Cable Type and Data Transmission Rate Unrepeated Distance 62.5/125 micron multimode at 1.0625 Gbps 300 meters (984 feet) 62.5/125 micron multimode at 2.1250 Gbps 150 meters (492 feet) 62.5/125 micron multimode at 4.2500 Gbps 75 meters (246 feet) 62.5/125 micron multimode at 10.2000 Gbps 33 meters (108 feet) 50/125 micron multimode at 1.0625 Gbps 500 meters (1,640 feet) 50/125 micron multimode at 2.1250 Gbps 300 meters (984 feet) 50/125 micron multimode at 4.2500 Gbps 150 meters (492 feet) 50/125 micron multimode at 10.2000 Gbps 82 meters (269 feet) 9/125 micron singlemode at 1.0625, 2.1250, 4.2500, or 10.2000 Gbps (10-kilometer SFP optical transceiver) 10.0 kilometers (6.2 miles) 9/125 micron singlemode at 1.0625, 2.1250, 4.2500, or 10.2000 Gbps (20-kilometer SFP optical transceiver) 20.0 kilometers (12.4 miles) 9/125 micron singlemode at 1.0625, 2.1250, 4.2500, or 10.2000 Gbps (35-kilometer SFP optical transceiver) 35.0 kilometers (21.7 miles) Link Budget 3.0 dB 2.2 dB 2.3 dB 2.4 dB 3.9 dB 2.8 dB 2.5 dB 2.2 dB 7.8 dB 7.8 dB 7.8 dB Cost Effectiveness Device or Cable Restrictions Cost is another factor governing the choice of transceiver type and optical fiber. Shortwave laser transceivers and multimode cable offer a less expensive solution if data transmission distance is not critical. The choice of transceiver and cable type may be restricted or dictated by: • Device restrictions - Some devices may be restricted to use of only one type of transceiver (shortwave or longwave). Refer to the device's supporting documentation for information. Physical Planning Considerations 5-5