Cisco 7800 Series Accessories Guide

Figure 20: A Cisco IP Phone 8800 Key Expansion Module in One Column Mode
Two-Column Mode
In two-column mode, each of the buttons on the left and right of the screen is assigned to different lines. In
this configuration, the key expansion module displays 18 lines on page 1, and 18 lines on page 2.
Figure 21: A Cisco IP Phone 8800 Key Expansion Module in Two Column Mode
Cisco IP Phone 7800 and 8800 Series Accessories Guide for Cisco Unified Communications Manager
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Key Expansion Modules
Column Mode for the Cisco IP Phone 8800 Key Expansion Module

Cisco 7800 Series Specifications

General

Wireless	No
Video Support	No
PoE	Yes, 802.3af/at
Audio Codec Support	G.711, G.722, G.729, iLBC
Network Protocols	SIP, SDP, IPv4, IPv6, UDP, TCP, DNS, TFTP, HTTP, HTTPS, DHCP
Security Features	802.1X, TLS, SRTP
Power Options	PoE
Headset Port	3.5mm
Buttons	Line keys, navigation cluster, softkeys, mute, speakerphone, headset, volume control
Bluetooth	No
Ethernet Switch	Yes, 2-port 10/100/1000
USB Port	Yes, for headset (7875)