Labeling Cables and Keeping Accurate Records
A reliable cable labeling system is essential when planning and installing a network.
Keeping accurate records helps you to:
• Relocate devices easily.
• Make changes quickly.
• Isolate faults in the distribution system.
• Locate the opposite end of any cable.
• Know the types of network devices that your cabling infrastructure can support.
Follow these guidelines when setting up a cable labeling system suitable for your installation:
• Identify cables by securely attaching labels to all cable ends.
• Assign a unique block of sequential numbers to the group of cables that run between each pair of
wiring closets.
• Assign a unique
identification number to each equipment rack.
• Identify all wiring closets by labeling the front panel of your Extreme Networks equipment and other
hardware.
• Keep accurate and current cable
identification records.
• Post records near each equipment rack. For each cable drop, include information about the cable
source, destination, and jumper location.
Installing Cable
When you connect cable to your network equipment, keep the following things in mind.
• Examine cable for cuts, bends, and nicks.
• Support cable using a cable manager that is mounted above connectors to avoid unnecessary
weight on the cable bundles.
• Use cable managers to route cable bundles to the left and right of the network equipment to
maximize accessibility to the connectors.
• Provide enough slack, approximately 5 to 7.5 cm (2 to 3 in), to provide proper strain relief as shown
in Figure 32 on page 44.
• Bundle cable using hook-and-loop straps to avoid injuring cables.
• If you build your own cable, be sure that connectors are properly crimped.
• When installing a patch panel using twisted pair wiring, untwist no more than 2.5 cm (1 in) of the
cable to avoid radio frequency (RF) interference.
• Discharge the RJ45 Ethernet cable before plugging it into a port on the switch.
Caution
Unshielded twisted pair (UTP) cable can build up electrostatic charges when being pulled
into a new installation. Before connecting any category 5 UTP cable to the switch,
discharge ESD from the cable by plugging the RJ45 connector into a LAN static discharge
device or use an equivalent method.
Site Preparation Labeling Cables and Keeping Accurate Records
ExtremeSwitching 5520 Series Hardware Installation Guide 43
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