Choosing a Suitable Site 65Choosing a SuitableSiteThe Webcache must be mounted in a standard 19-inch 4-postedequipment rack, and is suited for use in a wiring closet, an equipmentroom, a server room, or telecommunications room. A rack-mounting kit issupplied with the Webcache.CAUTION: Ensure that the ventilation holes in the Webcache are notobstructed.When deciding where to position the Webcache, ensure that: Cabling is located away from: sources of electrical noise such as radios, transmitters andbroadband amplifiers. power lines and fluorescent lighting fixtures. The Webcache is accessible and cables can be connected easily. Water or moisture cannot enter the case of the Webcache. Air-flow is not restricted around the Webcache. 3Com recommendsthat you provide a minimum of 25 mm (1 in.) clearance. Air temperature around the Webcache does not exceed 40 °C (104 ° F).If the Webcache is installed in a 19-inch rack or closed assembly its localair temperature may be greater than room ambient temperature. The air is as free from dust as possible. The Webcache is situated away from sources of conductive (electrical)dust, for example laser printers. The Webcache is installed in a clean, air conditioned environment. The AC supply used by the Webcache is separate to that used by unitsthat generate high levels of AC noise, for example air conditioningunits and laser printers.Rack-Mounting theWebcacheThe Webcache is 1U high and will fit in most standard 19-inch rackmounts.CAUTION: The rear of the Webcache must be supported. This is bestachieved through the use of a 19-inch 4-posted rack.CAUTION: Disconnect all cables from the Webcache before continuing.dua1611-5aaa04.book Page 65 Friday, November 29, 2002 8:56 PM
