3-1

Chapter 3: Installing the Switch

Selecting a Site

Switch units can be mounted in a standard 19-inch equipment rack or on a flat
surface. Be sure to follow the guidelines below when choosing a location.
• The site should:
- be at the cent er of all the devices you want to link and near a power outlet.
- be able to m aintain its temperature within
0 to 50 °C (32 to 122 °F) for the MIL-SM4804G, and
its humidity within 5% to 95%, non-condensing
- provide ad equate space (approximately two inches) on all sides for proper air
flow
- be accessible for installing, cabling and maintaining the devices
- allow the status LEDs to be clearly visible
• Make sure twisted-pair cable is always routed away from power lines, fluoresc ent
lighting fixtures and other sources of electrical interference, such as radio s and
transmitters.
• Make sure that the unit is connected to a separate grounded power outlet that
provides 100 to 240 VAC, 50 to 60 Hz, is within 2 m (6.6 feet) of each device and
is powered from an independent circuit breaker. As with any equipment, using a
filter or surge suppressor is recommended.

Ethernet Cabling

To ensure proper operation when installing the switch into a network, ma ke sure that
the current cables are suitable for 10BASE-T, 100BASE-TX or 1000BASE-T
operation. Check the following criteria against the current installation of yo ur
network:
• Cable type: Unshielded twisted pair (UTP) or shi elded twisted pair (STP) cables
with RJ-45 connectors; Category 3 or better for 10BASE-T, Category 5 or better
for 100BASE-TX, and Category 5, 5e or 6 for 1000BASE-T.
• Protection from radio frequency interference em issions
• Electrical surge suppression
• Separation of electrical wires (switch related o r other) and electromagnetic fields
from data based network wiring
• Safe connections with no damaged cables, connectors or shields