Installing the switch
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34
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Before installing the switch, verify that the switch is operational by powering it on and observing the boot.
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For 10/100/1000 ports, the cable length from a switch to an attached device cannot exceed 328 feet (100
meters).
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Clearance to front and rear panels must meet these conditions:
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Front-panel LEDs can be easily read.
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Access to ports is sufficient for unrestricted cabling.
o
Front-panel direct current (DC) power connectors and the alarm connector are within reach of the
connection to the DC power source.
(for JL818A)
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For rack mounting, do not physically stack equipment on top of another. Ensure an air gap of at least 2U. If only
1U or 1.75 in. (44.5 mm) of air gap is available, do not exceed 60 degrees Celsius (140 degrees Fahrenheit)
ambient temperature.
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For equipment cabinet (wall mount), airflow around the switch must be unrestricted. To prevent overheating,
ensure 40LFM of airflow with the following minimum clearances:
o
Top: 6.0 inch (152.4 mm)
o
Bottom: 3.0 inch (76.2 mm)
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Front / Sides: 1.0 inch (25.4 mm)
(for JL817A and JL818A)
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Do not mount the switch to any surface or in any orientation not supported in the installation instructions.
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Mount devices installed in a rack or cabinet as low as possible. Put the heaviest devices at the bottom and
progressively lighter devices positioned higher.
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To prevent the rack or cabinet from becoming unstable and/or falling over, ensure that it is adequately secured.
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Do not work on the system or connect or disconnect cables during periods of lightning activity.
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This equipment must be grounded. Never operate the equipment in the absence of a suitably installed ground
conductor. Contact the appropriate electrical inspection authority or an electrician if you are uncertain that
suitable grounding is available.
