Cisco 6851 Installation Guide

Installation Guide for Cisco IP Phone with Multiplatform Firmware
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Connect and Power Up a Cisco IP Phone
Basic Installation
Connect and Power Up a Cisco IP Phone
The ports on the rear panel of the phone are dierent on Cisco IP Phone 6800, 7800, and 8800 Series.
A power adapter is mandatory for 6841 and 6861
phones.
To avoid permanent damage on the phone, use the
power adapter shipped with your phone.
For 8800 series phones, you can adjust the angle of the
foot stand.
Plug in the Ethernet cable if you don’t want to
use the phone in a wireless network.
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1
3
4
Example: 8800 series phones

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