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Specifications

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Network Planning
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NXA-ENET8POE Gigabit PoE Ethernet Switch
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 802.3-2005 standards.
1000 Mbps Gigabit Ethernet Collision Domain
100 Mbps Fast Ethernet Collision Domain
10 Mbps Ethernet Collision Domain
Maximum 1000BASE-T Gigabit Ethernet Cable Length
Cable Type Maximum Cable Length Connector
Category 5, 5e, 6 100-ohm UTP or STP 100 m (328 ft) RJ-45
Maximum 1000BASE-SX Fiber Optic Cable Length
Fiber Diameter Fiber Bandwidth Cable Length Range Connector
62.5/125 micron multimode fiber (MMF) 160 MHz/km 2-220 m (7-722 ft) LC
200 MHz/km 2-275 m (7-902 ft) LC
50/125 micron multimode fiber (MMF) 400 MHz/km 2-500 m (7-1641 ft) LC
500 MHz/km 2-550 m (7-1805 ft) LC
Maximum 1000BASE-LX Fiber Optic Cable Length
Fiber Diameter Fiber Bandwidth Cable Length Range Connector
9/125 micron single-mode fiber N/A 2 m - 5 km (7 ft - 3.2 miles) LC
Maximum 1000BASE-LH Fiber Optic Cable Length
Fiber Diameter Fiber Bandwidth Cable Length Range Connector
9/125 micron single-mode fiber N/A 2 m - 70 km (7 ft - 43 miles) LC
Maximum Fast Ethernet Cable Length
Type Cable Type Maximum Cable Length Connector
100BASE-TX Category 5 or better 100-ohm UTP or
STP
100 m (328 ft) RJ-45
Maximum Ethernet Cable Length
Type Cable Type Maximum Cable Length Connector
10BASE-T Categories 3, 4, 5 or better 100-ohm UTP 100 m (328 ft) RJ-45