Cisco 6800 Series Administration Guide

Step 6 Align the new footstand into the slots in the phone and into the slots in the key expansion module. Press the
footstand firmly in place.
This step ensures that the phone and key expansion module remain connected at all times.
Step 7 Plug the LAN cable into the phone and into the LAN port.
Cisco IP Phone 6800 Series Multiplatform Phones Administration Guide
102
Phone Accessories
Install a Key Expansion Module

Cisco 6800 Series Specifications

General

Audio	Wideband audio
Ethernet	10/100/1000 Mbps
Power over Ethernet (PoE)	IEEE 802.3af/at
USB	USB
SIP	Yes
Supported Protocols	SIP
Codec Support	G.711, G.722, G.729, iLBC