Alcatel OS-LS-6248P Getting Started - Page 40

3 Making Network Connections Connectivity Rules When adding hubs (repeaters) to your network, please follow the connectivity rules listed in the manuals for these products. However, note that because switches break up the path for connected devices into separate collision domains, you should not include the switch or connected cabling in your calculations for cascade length involving other devices. 1000BASE-T Cable Requirements All Category 5 UTP cables that are used for 100BASE-TX connections should also work for 1000BASE-T, providing that all four wire pairs are connected. However, it is recommended that for all critical connections, or any new cable installations, Category 5e (enhanced Category 5) or Category 6 cable should be used. The Category 5e specification includes test parameters that are only recommendations for Category 5. Therefore, the first step in preparing existing Category 5 cabling for running 1000BASE-T is a simple test of the cable installation to be sure that it complies with the IEEE 802.3ab standards. 1000 Mbps Gigabit Ethernet Collision Domain Table 3-1. Maximum 1000BASE-T Gigabit Ethernet Cable Length Cable Type Category 5, 5e, 6 100-ohm UTP or STP Maximum Cable Length Connector 100 m (328 ft) RJ-45 Table 3-2. Maximum 1000BASE-SX Gigabit Ethernet Cable Length Fiber Size 62.5/125 micron multimode fiber 50/125 micron multimode fiber Fiber Bandwidth 160 MHz/km 200 MHz/km 400 MHz/km 500 MHz/km Maximum Cable Length 2-220 m (7-722 ft) 2-275 m (7-902 ft) 2-500 m (7-1641 ft) 2-550 m (7-1805 ft) Connector LC LC LC LC Table 3-3. Maximum 1000BASE-LX Gigabit Ethernet Cable Length Fiber Size 9/125 micron single-mode fiber Fiber Bandwidth N/A Maximum Cable Length Connector 2 m - 5 km (7 ft - 3.2 miles) LC 3-24 Downloaded from www.Manualslib.com manuals search engine