AudioCodes 400HD Series - Step 4: Attach the Panel; Step 5: Secure the Side Panel

Administrator's Manual A. Installing the Expansion Module
Version 3.4.4 203 400HD IP Phones Series - Teams Compatible
A.1.4 Step 4: Attach the Panel
Attach the panel that you removed from the phone in Step 3 to the side of the Expansion
Module:
A.1.5 Step 5: Secure the Side Panel
Invert the assembled unit and secure the side panel by screwing in the three screws: