3Com 2848 SFP User Guide - Page 19

Performing Spot Checks, 3Com recommends periodically checking the items listed - troubleshooting

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Page 19 highlights

Performing Spot Checks At frequent intervals, you should visually check the Switch. Regular checks can give you an early warning of a possible failure; any problems can then be attended to when there will be least effect on users. 3Com recommends periodically checking the items listed in Table 1. Table 1 Items to Check Cabling Cooling fan Check that all external cabling connections are secure and that no cables are pulled taut. Where possible, check that the cooling fan is operating by listening to the unit. The fan is fitted near to the front right hand side of the unit (when viewed from the front). If you experience any problems operating the Switch, refer to "Troubleshooting" on page 45. Performing Spot Checks 19

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Performing Spot Checks
19
Performing Spot Checks
At frequent intervals, you should visually check the
Switch. Regular checks can give you an early warning of
a possible failure; any problems can then be attended to
when there will be least effect on users.
3Com recommends periodically checking the items listed
in Table 1.
Table 1
Items to Check
If you experience any problems operating the Switch,
refer to “Troubleshooting” on page 45.
Cabling
Check that all external cabling connections
are secure and that no cables are pulled
taut.
Cooling fan
Where possible, check that the cooling fan
is operating by listening to the unit. The fan
is fitted near to the front right hand side of
the unit (when viewed from the front).