General InformationThe Cisco IP Phone 8851 is a business-class collaboration endpoint that combines high-fidelity, reliable, secure, and scalable voice over IP communications with Cisco Intelligent Proximity for telephony integration for personal mobile devices to support small 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 on-premises and hosted infrastructure platforms. It is also supported on third party hosted call control services.The IP Phone 8851 also comes standard with a USB port so you can charge your smartphone when at your desk, and stay connected when away from your desk.The Cisco IP Phone 8851 offers five programmable line keys. You can configure keys to support either multiple directory numbers or calling features such as speed dial. You can also boost productivity by handling multiple calls for each directory number using the multicall-per-line feature. Fixed-function keys give you one-touch access to applications, messaging, directory, as well as often-used calling features such as hold/resume, transfer, and conference. A five-way navigation cluster helps you transition through menus more easily. Backlit acoustic keys provide flexibility for audio path selection and switching.Other key features of the phone follow: The Cisco IP Phone 8851 offers a 5-in. high-resolution (800 x 480) widescreen VGA backlit color display. Localized language support, including right-to-left on-screen text, meets the needs of global users.The phone supports a built-in Gigabit Ethernet switch for your PC connection.Support for Cisco EnergyWise technology makes the Cisco IP Phone 8851 more energy-efficient and ecofriendly; the phone is qualified by the Energy Star organization.An optional wall-mount kit is orderable as a spare part for customers seeking this capability.Up to two optional IP Phone 8800 Key Expansion Modules with up to 72 additional line/feature keys are supported.Two color options (charcoal and white) are available. Technical InformationIP Phone Technology: VoIPWireless Technology: BluetoothCaller ID: YesSpeakerphone: Yes Display & GraphicsDisplay Color: Color Interfaces/PortsNetwork (RJ-45): YesNumber of Network (RJ-45) Ports: 2USB: YesPoE (RJ-45) Port: Yes Management & ProtocolsCommunication Protocols: SIPCommunication Protocols: LLDP-PoECommunication Protocols: SDPCommunication Protocols: UDPCommunication Protocols: RTPCommunication Protocols: DHCPCommunication Protocols: GARPCommunication Protocols: RTCPCommunication Protocols: PPDPCommunication Protocols: LLDPCommunication Protocols: LLDP-MEDCommunication Protocols: TLSCommunication Protocols: SRTPCommunication Protocols: SSHCommunication Protocols: CDP Physical CharacteristicsColor: CharcoalForm Factor: DesktopForm Factor: Wall MountableHeight: 9"Width: 10.1"Depth: 1.6"Weight (Approximate): 2.62 lb 
Mobility