SMC Networks 8728L2 FICHE, Руководство по установке

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ETWORK
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ONNECTIONS
4-6
The optional 10GBASE module operates at 10 Gbps full duplex. The
maximum length for fiber optic cable operating at 10 Gbps speed will
depend on the fiber type as listed under “10 Gbps Ethernet Collision
Domain” on page 4-7.
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 and 6 specifications
include 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.