Cisco 7841 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
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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 7841 Specifications

General

Ethernet Switch	Yes
Lines	4
Headset Port	Yes
Wall Mountable	Yes
Display	3.5-inch grayscale display
Audio	Wideband audio
PoE	IEEE 802.3af
Speakerphone	Full-duplex
Ethernet Ports	2 x 10/100/1000
Headset Jack	RJ9
Protocols	SIP
Codec Support	G.711, G.722, G.729, iLBC
Mounting	Desk or wall
Weight	1 kg