HP StorageWorks 64 FW 07.00.00/HAFM SW 08.06.00 McDATA Products in a SAN Envir - Page 211

Physical Planning Considerations 5 Table 5-1 Cable Type and Transmission Rate versus Distance and Link Budget Cable Type and Data Transmission Rate 62.5/125 micron multimode at 1.0625 Gbps 62.5/125 micron multimode at 2.1250 Gbps 62.5/125 micron multimode at 10.2000 Gbps 50/125 micron multimode at 1.0625 Gbps 50/125 micron multimode at 2.1250 Gbps 50/125 micron multimode at 10.2000 Gbps 9/125 micron singlemode at 1.0625, 2.1250, or 10.2000 Gbps (10-kilometer SFP optical transceiver) 9/125 micron singlemode at 1.0625 or 2.1250 Gbps (20-kilometer SFP optical transceiver) 9/125 micron singlemode at 1.0625, 2.1250, or 10.2000 Gbps (35-kilometer SFP optical transceiver) Unrepeated Distance 250 meters (820 feet) 120 meters (394 feet) 75 meters (246 feet) 500 meters (1,640 feet) 300 meters (984 feet) 150 meters (492 feet) 10.0 kilometers (6.2 miles) 20.0 kilometers (12.4 miles) 35.0 kilometers (21.7 miles) Link Budget 2.8 dB 2.2 dB xxx dB 3.9 dB 2.8 dB xxx 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. • Existing cable restrictions - The enterprise may contain only one type of fiber-optic cable (multimode or singlemode), and the customer may be required to use the existing cables. Customers may also be required to use existing copper cables for some arbitrated loop devices. Physical Planning Considerations 5-5