C
HAPTER
3
| Making Network Connections
Connectivity Rules
– 35 –
Figure 16: Making Fiber Port Connections
4.
As a connection is made, check the Link LED on the switch corresponding to
the port to be sure that the connection is valid.
The 1000BASE-SX, 1000BASE-LX and 1000BASE-LH fiber optic ports operate at
1 Gbps full duplex, with auto-negotiation of flow control. The maximum length
for fiber optic cable operating at Gigabit speed will depend on the fiber type as
listed under
"1000 Mbps Gigabit Ethernet Collision Domain" on page 36
.
C
ONNECTIVITY
R
ULES
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 C
ABLE
R
EQUIREMENTS
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
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