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20 CHAPTER 2: INSTALLING THE SWITCH
Package Contents ■ Switch unit
■ CD-ROM
■ This Guide
■ Management Quick Reference Guide
■ Release Notes
■ Warranty Flyer
■ Power Cord
■ 2 x securing brackets
■ 4 x screws (Switch 3812 and Switch 3824)
■ 8 x screws (Switch 3848)
■ 4 x rubber feet
■ RJ45 to DB9 converter cable (Switch 3848 only)
Choosing a Suitable
Site
The Switch is suited for use in an internal wiring closet, a network room,
or telecommunications room, where it can be mounted in a standard
19-inch equipment rack, or free-standing.
CAUTION: Ensure that the ventilation holes are not obstructed.
The Switch 3848 is fitted with high speed fans that have a high audible
output while running at full speed. The Switch is designed to reduce the
fan speed shortly after power on (if thermal conditions allow) which will
also reduce the fan noise generated.
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
25 mm (1 in.) clearance.
■ Air temperature around the Switch does not exceed 40 °C (104 °F).
dua1740-0aaa03.book Page 20 Thursday, December 23, 2004 9:23 PM