Polycom SoundStructure C16 Design Manual page 311

Or click Upgrade Plug-in Card from the Wiring page as shown next.
Upgrade Plugin Card
Next, the steps required to change your plug-in cards are presented.
1 Select the plug-in cards to change. For each plug-in card in the SoundStructure system, you have
the following options:
 Leave the plug-in card as it is,
 Change the plug-in card to a different card, or
 Remove the plug-in card from the system.
Polycom, Inc. 311