Cisco 8841 Administration Guide

Cisco IP Phone 8851
Phone Connections
Connect your phone to the corporate IP telephony network as shown in the following diagram.
Auxiliary port.6DC adaptor port (DC48V).1
Handset connection.7AC-to-DC power supply (optional).2
Analog headset connection (optional).8AC power wall plug (optional).3
USB port9Network port (10/100/1000 SW) connection.
IEEE 802.3at power enabled.
4
Access port (10/100/1000 PC) connection.5
Each USB port supports the connection of up to five supported and nonsupported devices. Each device
connected to the phone is included in the maximum device count. For example, your phone can support five
USB devices (such as two key expansion modules, one headset, one hub, and one other standard USB device)
on the side port. Many third-party USB products count as multiple USB devices, for example, a device
containing USB hub and headset can count as two USB devices. For more information, see the USB device
documentation.
Note
Cisco IP Phone 8800 Series Multiplatform Phones Administration Guide
29
About the Cisco IP Phone
Cisco IP Phone 8851

Cisco 8841 Specifications

General

Resolution	800 x 480 pixels
Audio	Wideband audio
Bluetooth	No
Ethernet	10/100/1000 Mbps
PoE	IEEE 802.3af compliant
Connectivity	Ethernet
Buttons	4 programmable line keys
Speakerphone	Full-duplex speakerphone
Headset Jack	Yes, RJ9
Codecs	G.711, G.722, G.729a, iLBC
Power Options	PoE
Network Interfaces	Dual Gigabit Ethernet ports
Security	Secure boot, 802.1X authentication, secure credential storage
Dimensions	40 mm
Weight	2.5 lb (1.1 kg)