- 5 inch color backlit LCD display (800 x 480 pixels)- 10 programmable line keys with tri-color LED indicators- Fixed feature keys include action, favorite, hold/resume, transfer, conference, application, calendar, directory, speakerphone, headset, mute, volume control- 4 way navigation cluster with select key- Top 360 LED and front arc LED indicates states of call, message, and the phone- One USB-A port for connecting USB headsets or Bluetooth headset dongle- One USB-C port for connecting USB headsets or Bluetooth headset dongle- USB port can also be used to charge a mobile device when the 9851 is powered via AC outlet- 2-port 10/100/1000BASE-T Gigabit Ethernet switch- Built-in Bluetooth 5.2- Built-in dual band 2.4GHz/5GHz Wi-Fi (802.11a/b/g/n/ac)- Supports up to three Cisco 9800 KEMs to add additional programmable buttons- One platform with PhoneOS provides support for all platforms - Cisco Unified Communications Manager (CUCM), Webex Calling, Broadworks, or 3rd Party Cloud Calling (3PCC/OpenSIP)- Built-in Action button can be configured for any use case (e.g. emergency alerts, security, IT, front desk, broadcast/paging, and more)- One Button to Push (OBTP) allows you to quickly join any meeting from the device's screen when registered to WebEx calling- Equipped with government grade security so communications are encrypted end-to-end- Powered via Power over Ethernet (802.3af), optional PoE injector, or optional AC adapter (sold separately; see drop down option above)- Wall mountable with optional wall mount kit

• High-resolution color display for easy navigation
• Supports wideband audio for clear voice quality
• Multiple lines and programmable keys for increased productivity
• Integrated with Cisco collaboration tools for a unified experience
• Easy-to-use interface with customizable settings