Cisco 8800 Series Administration Manual page 131

Hardware and Accessory Installation
Step 4 Remove the two accessory connector covers, as shown in the diagram.
Caution
Step 5 Position the phone so that the front of the phone faces up.
Step 6
Connect one end of the key expansion module spine connector to the accessory connector on the Cisco IP
Phone.
a) Align the spine connector with the accessory connector ports.
Note
b) Firmly press the spine connector into the phone.
The slots are designed for the spine connector only. Insertion of other objects will cause permanent
damage to the phone.
Install the connector in the orientation shown in the following diagrams.
Cisco IP Phone 8800 Series Multiplatform Phones Administration Guide
Connect Two or Three Key Expansion Modules to a Cisco IP Phone
115