Allied Telesis NETEXTREME II AT-2973SX - Manual (Page 33)

AT-2973SX, AT-2973T, and AT-2973T/4 NetExtreme II Family Adapters Installation and User’s Guide
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2. Align the tabs of the standard bracket with the holes on the adapter
and fasten the screws onto the adapter. See Figure 8.
Figure 8. Fastening Screws onto Standard Bracket
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