26 CHAPTER 2: INSTALLING THE W EBCACHEPackage Contents Webcache 1000 (3C16115) or Webcache 3000 (3C16116) CD-ROM User Guide (this guide) Release Notes Warranty Card Power Cord Rack-Mounting Kit containing: 2 x Rack Mounting Rails 2 x Rack Mounting Brackets 2 x Adjustable Brackets 2 x Front Plates 16 x ScrewsThese items are shown in Figure 4 on page 27.Choosing 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).