Cisco CP-8851-K9 IP Phone 8851 5-Inch Color Display Gigabit Ethernet PoE

5-Inch WVGA Color Display

The Cisco IP Phone 8851 features a 5-inch, 800 × 480 WVGA widescreen backlit color display with 24-bit color depth. The display provides clear access to calling information, directories, applications and supported text-based XML applications.

Five Programmable Line Keys

The CP-8851-K9 provides five programmable line and feature keys for convenient access to directory numbers, speed dialing and supported call functions. Dedicated keys provide direct access to commonly used features including messaging, directories, applications, hold, transfer and conference functions.

Wideband Enterprise Audio

Cisco designed the 8851 for clear business voice communication with wideband audio and a full-duplex speakerphone. Advanced audio processing technologies help improve voice quality in professional environments.

Multiple Audio Codec Support

The CP-8851-K9 supports a broad selection of voice codecs for enterprise IP telephony deployments, helping organizations integrate the phone with supported Cisco collaboration and voice infrastructures.

• G.711 A-law and u-law
• G.722
• G.722.2
• G.729ab
• iLBC
• iSAC
• OPUS

Gigabit Ethernet Connectivity

The Cisco IP Phone 8851 includes an integrated 10/100/1000BASE-T Gigabit Ethernet switch. This allows the phone to connect to an enterprise LAN while providing network connectivity for a co-located computer through the phone's integrated Ethernet switch.

Bluetooth and USB Connectivity

The CP-8851-K9 adds convenient connectivity options for modern workplaces. Integrated Bluetooth 3.0 EDR supports compatible wireless devices, while the USB port can be used for supported smartphone charging and Cisco collaboration functionality.

Power over Ethernet

The Cisco CP-8851-K9 supports Power over Ethernet (PoE), allowing power and network connectivity to be delivered through Ethernet cabling. The phone supports IEEE 802.3af and IEEE 802.3at PoE configurations.

Cisco Intelligent Proximity

Cisco Intelligent Proximity provides supported mobile-device integration features, allowing users to interact with compatible mobile devices through the Cisco IP Phone environment. This feature is designed to improve the user experience when combining desktop voice communication with mobile workflows.

Enterprise Calling Features

The CP-8851-K9 supports a broad range of enterprise telephony capabilities for everyday business communication.

Network and Security

The CP-8851-K9 supports enterprise networking and security protocols required for controlled IP voice deployments. Supported technologies include SIP signaling, IPv4, IPv6, RTP, RTCP, DHCP, DNS, VLAN, Cisco Discovery Protocol and LLDP-MED.

Security capabilities include secure boot, secure credential storage, device authentication, configuration and image authentication, certificate support, 802.1X capabilities, TLS signaling encryption, SRTP media encryption and HTTPS.

Cisco Unified Communications Compatibility

The Cisco IP Phone 8851 is designed for Cisco collaboration environments and supported enterprise call-control platforms. Cisco documentation identifies the phone for use with Cisco Unified Communications Manager and supported hosted collaboration solutions.

Ergonomic Desktop Design

The Cisco 8851 is designed for comfortable daily desktop operation. Its adjustable foot stand provides two viewing positions, while the stand can be removed when using an optional Cisco wall-mount kit.

Energy Efficiency

The Cisco IP Phone 8851 supports Cisco EnergyWise capabilities and is Energy Star qualified. These features help organizations incorporate supported energy-management practices into enterprise deployments.

Ideal Applications

Why Choose Cisco CP-8851-K9?

The Cisco CP-8851-K9 combines enterprise-grade IP voice capabilities with a 5-inch color display, five programmable line keys, wideband audio, Gigabit Ethernet, Bluetooth, USB and PoE. Its extensive calling, networking and security capabilities make it suitable for organizations deploying Cisco-based unified communications and enterprise telephony solutions.