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.

    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 flow 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 switch is situated away from sources of conductive (electrical) dust, for example, laser printers.

    the unit is installed in a clean, air conditioned environment.

    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.

    no more than eight switch units are placed on top of one another, if the units are free-standing.