MRV Communications MR2228-S2C User Manual

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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 center of all the devices you want to link and near a power outlet. 
• be able to maintain its temperature within 0 to 40 °C (32 to 104 °F) and its 
humidity within 5% to 95%, non-condensing 
• provide adequate 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, 
fluorescent lighting fixtures and other sources of electrical interference, such as 
radios 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 2.44 m (8 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, make 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 your 
network: 
• Cable type: Unshielded twisted pair (UTP) or shielded twisted pair (STP) cables 
with RJ-45 connectors; Category 3 or better for 10BASE-T, and Category 5 or 
better for 100BASE-TX or 1000BASE-T. 
• Protection from radio frequency interference emissions 
• Electrical surge suppression 
• Separation of electrical wires (switch related or other) and electromagnetic fields 
from data based network wiring 
• Safe connections with no damaged cables, connectors or shields