Connectivity Rules; 1000Base-T Cable Requirements; 1000 Mbps Gigabit Ethernet Collision Domain; Table 4-1 Maximum 1000Base-T Gigabit Ethernet Cable Length - LevelOne GSW-1676 User Manual

M N
AKING ETWORK

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

Table 4-1 Maximum 1000BASE-T Gigabit Ethernet Cable Length

Cable Type
Category 5, 5e, 6 100-ohm UTP or STP

Table 4-2 Maximum 1000BASE-SX Fiber Optic Cable Length

Fiber Diameter
62.5/125 micron
multimode fiber (MMF)
50/125 micron
multimode fiber (MMF)
4-6
C
ONNECTIONS
Fiber
Bandwidth
160 MHz/km
200 MHz/km
400 MHz/km
500 MHz/km
Maximum Cable
Length
100 m (328 ft)
Cable Length
Range
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
RJ-45
Connector
LC
LC
LC
LC