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1. Prepare the Installation Site
Cabling Infrastructure - Ensure that the cabling infrastructure meets
the necessary network specifications:
•
For the 10Base-T ports, use category 3, 4, or 5, four-pair, 100 ohm UTP
(unshielded twisted-pair) cables. Cable lengths can be up to 100
meters for category 3 or 4, and 150 meters for category 5. For
connecting these ports to end nodes, use "straight-through" cable; for
connecting to hubs or other switches, use "crossover" cable. See
appendix A, "Cables and Connectors" for more information
•
For the fixed 100Base-TX port and 100Base-TX transceivers that you
install in the transceiver slot, use category 5, 100-ohm UTP cables.
Cable lengths can be up to 100 meters.
For connecting these ports to end nodes, use "straight-through" cable;
for connecting to hubs and switches, use "crossover" cable.
•
For 100Base-FX transceivers that you install in the transceiver slot,
use 1300 nm multi-mode fiber-optic cables that are fitted with SC
connectors, and conform to ISO/IEC 793-2 type B1 and ITU-T G.652
standards. Cable lengths can be up to 1 kilometer.
Installation Precautions -
•
Before installing the switch, plan its location and orientation relative
to other devices and equipment. In the front of the switch, leave at
least 3 inches (7.6 cm) of space for the twisted-pair and fiber-optic
cabling. In the back, leave at least 1 1/2 inches (3.8 cm) of space for
the power cord.
•
Caution: Ensure that the switch does not overload the power
circuits, wiring, and over-current protection. To determine the possi-
bility of overloading the supply circuits, add together the ampere
ratings of all devices installed on the same circuit as the switch and
compare the total with the rating limit for the circuit. The maximum
ampere ratings are usually printed on the devices near the AC power
connectors.
•
Caution: Ensure that the power source circuits are properly
grounded. See the Safety Statements at the end of this manual.
•
Do not install the switch in an environment where the operating
ambient temperature might exceed 55 C (131 F).
•
Make sure the air flow around the sides of the switch is not restricted.
Installing the Switch 208/224
Installation Steps
1-3
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