Allied Telesis AT-AR048 Installations- und Sicherheitshandbuch - Seite 7
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Installation and Safety Guide
7
If an NSM is already installed, disconnect its network cables and TNV lines
before removing it from the switch or router.
Remove the NSM by unscrewing both thumbscrews at the same time. As the
thumbscrews are turned, they will push the NSM out of the bay.
If the NSM has extractor levers, moving them to the open position will assist the
removal process (see the following figure).
Close
Open
When removing an NSM, take care to turn each thumbscrew by an equal
amount to ensure the NSM does not become misaligned. Forcing a jammed
thumbscrew may damage the NSM.
If a thumbscrew becomes tight, it must not be forced. Instead, screw it in or out
slightly to loosen it and then try again, taking care to unscrew both thumbscrews
at the same rate.
Keep the face-plate for future use. If you remove an NSM, replace the face-plate
to prevent dust and debris from entering the switch or router and to maintain
proper airflow.
4. Prepare the NSM.
In an antistatic environment, remove the NSM from its packing material. Be sure
to observe ESD precautions.
Warning Do not attempt to install an NSM without observing correct antistatic
procedures. Failure to do so may damage the switch, router, or NSM. If you are
unsure what the correct procedures are, contact your authorised Allied Telesis
distributor or reseller.
613-000610 Rev A