Introduction

The Cisco IP Phone 8851 is a business-class collaboration endpoint that combines high-fidelity, reliable, secure, and scalable voice communications with Cisco Intelligent Proximity for telephony integration for personal mobile devices to support midsize to large enterprise businesses.

With the Cisco IP Phone 8851, you can increase personal productivity through an engaging user experience that is both powerful and easy-to-use. The IP Phone 8851 combines an attractive new ergonomic design with wideband audio for crystal clear voice communications, "always-on" reliability, encrypted voice communications to enhance security, and access to a comprehensive suite of unified communication features from Cisco communication servers.

Specifications

Technical Information
IP Phone Technology:	VoIP
Connectivity Technology:	Cable
Caller ID:	Yes
Speakerphone:	Yes
Features:	Messages Hold Call Resume Call Transfer Conference Call Hearing Aid Hands-free Speed Dial Message Waiting LED Indicator Security Adjustable Display Auto-answer (BLF) Busy Lamp Field Call Forwarding Call History Call Park Call Pick-up Date and Time Call Waiting Group Pick-up Intercom Music on Hold Mute Distinctive Ringing Redial Call Share Voice Mail Multilingual Menu Bluetooth
Voice Codec:	G.711a G.711u G.722 G.729a iLBC iSAC
Dialer Type:	Keypad
Display & Graphics
Screen Type:	LCD
Backlight:	Yes
Screen Size:	12.7 cm (5")
Screen Resolution:	800 x 480
Interfaces/Ports
Network (RJ-45):	Yes
Number of Network (RJ-45) Ports:	2
USB:	Yes
Headset Port:	Yes
PoE (RJ-45) Port:	Yes
Management & Protocols
Communication Protocols:	SIP LLDP-PoE SDP DHCP RTP RTCP LLDP LLDP-MED SRTP
Quality of Service:	802.1Q VLAN Support 802.1p/q
Controls/Indicators
Buttons & Keys Type:	Programmable Directory Message Line Select Navigation Hold Button Call Transfer Conference Volume Control Speaker Headset Mute
Power Description
Input Voltage:	48 V DC
Power Source:	AC Adapter
Physical Characteristics
Form Factor:	Wall Mountable
Height:	229.1 mm
Width:	257.3 mm
Depth:	39.9 mm
Weight (Approximate):	1.17 kg