Allied Telesis AT-8550SP - Manual (Page 54)

Installation
54
Note
If removing a module, store the device in an antistatic bag or
immediately install it in another switch.
Figure 13 Removing the Expansion Slot Faceplate
5. Pull the faceplate straight out of the slot.
Keep the faceplate in a safe area in case you need to reinstall it. The
faceplate keeps any dust from getting into the switch and
maintains proper airflow if the slot remains empty.
6. Carefully slide the module into the slot until the module faceplate
makes contact with the switch, as shown in Figure 14. Avoid
touching the module components.
Figure 14 Installing a Module
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