Cisco 8800 Series Administration Manual page 127

Hardware and Accessory Installation
Procedure
Step 1
Unplug the Ethernet cable from the phone.
Step 2 If installed, remove the footstand from the phone.
Step 3
Locate the accessory connector covers on the side of the phone.
This diagram shows the location.
Step 4 Remove the two accessory connector covers, as shown in the diagram.
Caution
The slots are designed for the spine connector only. Insertion of other objects will cause permanent
damage to the phone.
Cisco IP Phone 8800 Series Multiplatform Phones Administration Guide
Connect a Key Expansion Module to a Cisco IP Phone
111