Cisco IP Phone 7800 Series User Manual page 28

Connect a Key Expansion Module to a Cisco IP Phone
Step 7
Connect the other end of the spine connector to the key expansion module as shown in this diagram.
a) Align the spine connector with the key expansion module accessory connector ports.
b) Firmly press the key expansion module into the spine connector.
Cisco IP Phone 7800 and 8800 Series, Cisco IP Conference Phone 7832, and Cisco ATA 190-SC User Guide for Webex Calling (formerly Spark
Call)
14
Add Buttons to Your Phone (8800 Series)