CP-8851-K9 | Cisco IP Phone 8851 VoIP Phone

Technical Specs:
- Display: 5-inch widescreen VGA (800x480 pixel) backlit color display
- Ethernet switch: 10/100/1000
- PoE: IEEE 802.3af/at/bt class 4 compliant (class 5 with optional adapter)
- Protocol support: SIP, SCCP
- Audio codec: G.711a, G.711u, G.729a, G.729ab, iLBC, G.722, OPUS
- Speakerphone: Full-duplex
- Headset support: RJ-9 jack, Bluetooth, USB
- Power consumption: 6 watts (standby), 10 watts (maximum)
- Dimensions: 10.47 x 10.63 x 6.57 inches
- Weight: 3.5 pounds
- Operating temperature: 32 to 104°F (0 to 40°C)
- Humidity: 10 to 90% noncondensing

Helpful Notes:
- The phone has a built-in Bluetooth radio, allowing you to pair it with a Bluetooth headset or mobile device.
- The 8851 supports up to two optional Key Expansion Modules, adding up to 72 additional line/feature keys.
- The phone's firmware can be upgraded remotely using Cisco Unified Communications Manager.