Appendix C Cabling Guidelines; Fast Ethernet Cable Guidelines - NETGEAR FS518 Installation Manual

Fast ethernet switch with gigabit uplinks

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This appendix provides speciﬁcations for cables used with the Model FS518 Fast Ethernet Switch.

Fast Ethernet uses UTP cable, as speciﬁed in the IEEE 802.3u standard for 100BASE-TX. The

speciﬁcation requires Category 5 UTP cable consisting of either two-pair or four-pair twisted

insulated copper conductors bound in a single plastic sheath. Category 5 cable is certiﬁed up to

100 MHz bandwidth. 100BASE-TX operation uses one pair of wires for transmission and the other

pair for receiving and for collision detection.

When installing Category 5 UTP cabling, use the following guidelines to ensure that your cables

perform to the following speciﬁcations:

•

Certiﬁcation

Make sure that your Category 5 UTP cable has completed the Underwriters Laboratories (UL)

or Electronic Testing Laboratories (ETL) certiﬁcation process.

•

Termination method

To minimize crosstalk noise, maintain the twist ratio of the cable up to the point of termina-

tion; untwist at any RJ-45 plug or patch panel should not exceed 0.5 inch (1.5 cm).

Cabling Guidelines

Appendix C

Cabling Guidelines

C-1

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Fs518t - switch