24 CHAPTER 2: INSTALLING THE SWITCH
Package Contents ■ Switch unit
■ CD-ROM
■ Getting Started Guide (this guide)
■ Management Quick Reference Guide
■ Release Notes
■ Unit Information Labels
■ Warranty Information
■ Power Cord 
■ 2 x Mounting brackets
■ 4 x Screws
■ 4 x Rubber feet
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, as an aggregator 
for other Hubs and Switches. 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.
DUA1720-3AAA05.book  Page 24  Friday, March 7, 2003  11:53 AM