Cisco 8851-K9 IP Phone 

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.  

Cisco CP-8851-K9 integrates 5 inches high-resolution widescreen VGA backlit color display. It supports Localized language to meet the needs of global users. Bluetooth 3.0 supports phone book object exchange between devices, two USB ports enhance the usability of call handling by enabling wired or wireless headsets, as well as provide charging capability to mobile devices such as smartphones or tablets. The five programmable line keys support multiple directory numbers or calling features.

Cisco 8851-K9 IP Phone specifications

• Phone Model: Cisco 8851-K9 IP Phone

Display and User Interface:

• Display: 5-inch widescreen backlit color display
• Resolution: 800 x 480 pixels
• Touchscreen: No
• Softkeys: 5 context-sensitive programmable softkeys
• Navigation Cluster: 4-way navigation cluster for menu and feature navigation

Audio Features:

• Audio Codec Support: G.711a, G.711u, G.729a, G.729ab, G.722, iLBC
• Speakerphone: Full-duplex speakerphone with acoustic echo cancellation
• Headset Port: RJ-9 headset port
• Bluetooth Support: Yes (Bluetooth 4.1)

Voice Quality:

• Wideband Audio Support: Yes (G.722)
• Full-Duplex Speakerphone: Yes

Networking and Connectivity:

• Ethernet Ports: 2 x 10/100/1000 Gigabit Ethernet ports
• Power over Ethernet (PoE) Support: Yes (IEEE 802.3af and 802.3at)
• Wi-Fi Support: Yes (requires separate Cisco Wireless LAN Controller)
• Bluetooth Support: Yes (Bluetooth 4.1)
• USB Port: 2 x USB ports (for accessories and future expansion)

Additional Features:

• Programmable Line Keys: 5 programmable line/feature keys with tri-color LED
• Fixed Feature Keys: Hold, Transfer, Conference, Mute, Volume Control, Speakerphone, Headset, Contacts, Applications
• Messages Key: Direct access to voicemail
• Directory: Supports local and server-based directories
• Call History: Lists incoming, outgoing, and missed calls
• Call Waiting Indicator: Yes
• Call Transfer: Yes
• Call Forwarding: Yes
• Redial: Yes
• Do Not Disturb: Yes
• Multi-language Support: Yes
• Wall-Mountable: Yes, with optional wall mount kit

Power Requirements:

• Power Source: Power over Ethernet (PoE) or optional external power supply