Cisco IP Phone 7800 Series User Manual page 29

Add Buttons to Your Phone (8800 Series)
Step 8
(Optional) Use a second key expansion module spine connector to connect the second key expansion module
to the first key expansion module.
Step 9 (Optional) Use a third key expansion module spine connector to connect the third key expansion module to
the second key expansion module.
Step 10 Use a screwdriver to fasten the screws into the phone.
This step ensures that the phone and key expansion module remain connected at all times. This diagram shows
the location of the screw holes on the phone and one key expansion module.
Cisco IP Phone 7800 and 8800 Series, Cisco IP Conference Phone 7832, and Cisco ATA 190-SC User Guide for Webex Calling (formerly Spark
Connect a Key Expansion Module to a Cisco IP Phone
Call)
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