Cisco Ip Phone 8800 Series Administration Guide For Cisco Unified Communications Manager - Cisco 8800 Series Administration Manual

The first Key expansion module is now connected to the Cisco IP Phone.
Step 8 Use a second key expansion module spine connector to connect the second key expansion module to the first
key expansion module.
Step 9
Use a third key expansion module spine connector to connect the third key expansion module to the second
(middle) key expansion module. This figure shows a Cisco IP Phone with three key expansion modules
attached.
Step 10 Use a screwdriver to fasten the screws into the phone and into each key expansion module.
This step ensures that the phone and key expansion modules remain connected at all times. This diagram
shows the location of the screw holes.

Cisco IP Phone 8800 Series Administration Guide for Cisco Unified Communications Manager

Connect Two or Three Key Expansion Modules to a Cisco IP Phone
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