Paradise Datacom 4 RU Chassis, Operation Manual

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122 201627 REV X 4 RU SSPA Chassis Operations Manual
Again, the wires with colored backgrounds may have white stripes and may be
denoted that way in diagrams found elsewhere. For example, the green wire may be
labeled Green-White. The background color is always specified first.
Now, all you need to remember, to properly configure the cables, are the diagrams for
the two cable ends and the following rules:
•
A straight-thru cable has identical ends.
•
A crossover cable has different ends.
It makes no functional difference which standard you use for a straight-thru cable.
You can start a crossover cable with either standard as long as the other end is the
other standard. It makes no functional difference which end is which. 568A patch
cable will work in a network with 568B wiring and 568B patch cable will work in a 568A
network
Here are some essential cabling rules:
1. Try to avoid running cables parallel to power cables.
2. Do not bend cables to less than four times the diameter of the cable.
3. If you bundle a group of cables together with cable ties (zip ties), do not over-
cinch them. It's okay to snug them together firmly; but don't tighten them so
much that you deform the cables.
4. Keep cables away from devices which can introduce noise into them. Here's
a short list: copy machines, electric heaters, speakers, printers, TV sets, fluores-
cent lights, copiers, welding machines, microwave ovens, telephones, fans, ele-
vators, motors, electric ovens, dryers, washing machines, and shop equipment.
5. Avoid stretching UTP cables (tension when pulling cables should not exceed
25 LBS).
6. Do not run UTP cable outside of a building. It presents a very dangerous
lightning hazard!
7. Do not use a stapler to secure UTP cables. Use telephone wire/RG-6 coax-
ial wire hangers, which are available at most hardware stores.