3Com 3CR17561-91-US Getting Started Guide - Page 25
Choosing a Suitable Site, CAUTION - wiring
UPC - 662705496238
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Choosing a Suitable Site 25 Choosing a Suitable Site The Switch is suited for use on a desktop, either free standing or mounted in a standard 19-inch equipment rack. Alternatively, the Switch can be mounted in a wiring closet or equipment room. A rack-mounting kit containing two mounting brackets is supplied with the Switch. CAUTION: Ensure that the ventilation holes are not obstructed. When deciding where to position the Switch, ensure that: ■ Cabling is located away from: ■ sources of electrical noise such as radios, transmitters and broadband amplifiers. ■ power lines and fluorescent lighting fixtures ■ The Switch is accessible and cables can be connected easily. ■ Water or moisture cannot enter the case of the Switch. ■ Air flow is not restricted around the Switch or through the vents in the side of the Switch. 3Com recommends that you provide a minimum of 25mm (1in.) clearance. ■ Air temperature around the Switch does not exceed 40 °C (104 °F). If the Switch is installed in a 19-inch rack or closed assembly its local air temperature may be greater than room ambient temperature. ■ The air is as free from dust as possible. ■ The unit is installed in a clean, air conditioned environment. ■ No more than eight Switch units are placed on top of one another, if the units are free-standing. ■ The Switch is situated away from sources of conductive (electrical) dust, for example laser printers. ■ The AC supply used by the Switch is separate to that used by units that generate high levels of AC noise, for example air conditioning units and laser printers.