Cisco 6851 Installation Guide

Installation Guide for Cisco IP Phone with Multiplatform Firmware
6
Install a Key Expansion Module on Your 6851 Phone
Key Expansion Module Installation
Install a Key Expansion Module on Your 6851 Phone
393760
393758
2
1
393761
393763
3
4
Plug the powder adapter (if used).
The power adapter is optional. 6851 phones support
Power over Ethernet (PoE).
Use the short cable to connect the RJ9
ports on the phone and the key expansion
module.
Plug the LAN cable into the phone and into
the LAN port.
Press the new foot stand rmly in place.

Cisco 6851 Specifications

General

Network Protocols	SIP
Speakerphone	Yes
Bluetooth	No
Wi-Fi	No
USB Port	No
Display	3.5 inch grayscale display (396 x 162 pixels)
Ethernet	10/100 Ethernet
PoE	IEEE 802.3af
Audio	Wideband audio
Line Keys	4
Headset Port	RJ9
Supported Codecs	G.711, G.722, G.729, iLBC
Weight	0.9 kg