Cisco IP Phone 8851 – VoIP phone


  • The phone offers an easy-to-use interface and provides a traditional telephony-like user experience
  • A full-duplex speakerphone gives you flexibility in placing and receiving calls with hands free
  • The analog headset jack is a standard wideband-capable RJ-9 audio port
  • Line keys
  • Soft keys
  • Back and release keys
  • Four-way navigation and select keys
  • Hold/resume, transfer, and conference keys
  • Messaging, application, and directory keys
  • Standard keypad
  • Volume-control toggle key
  • Speakerphone, headset, and mute keys

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Cisco IP Phone 8851 Highlight

  • High-quality, full-duplex, wideband audio and superior echo cancellation for exceptional clarity when communicating
  • Integration with personal mobile devices using¬†Cisco Intelligent Proximity for Mobile Voice
  • Simplified dialling and expanded status detail with the optional Cisco IP Phone 8800 Key Expansion Module
  • Choice of wired, USB and Bluetooth headsets from Cisco third-party vendor partners

Tech description

Programmable line and feature keys 5
Display 5-inch widescreen VGA (800×480 pixel), 24-bit color
Integrated switch 10/100/1000
Wideband audio G.722 on handset, speakerphone, and headset
Personal mobile device integration Yes; (Cisco Intelligent Proximity for Mobile Voice)
Headset ports RJ-9; auxiliary port, USB, Bluetooth
Wall-mount option Yes
IP Phone 8800 Key Expansion Module Optional; Up to two (72 additional keys)

Aren’t sure yet? Take a look at our VoIP guide solutions for small businesses.¬†

Additional information

Weight 2.0 kg
Dimensions 4 × 25.734 × 22.91 cm

Does Cisco phone have Bluetooth?
The Cisco IP Phone 8800 Series Multiplatform Phones allow you to pair your mobile device such as phone or tablet through Bluetooth. This connection allows you to make and answer phone calls on either the mobile device or the IP Phone. This ability to use the mobile line on your IP phone is called Intelligent Proximity

How many lines does a Cisco 8851 have?

How do I reset my Cisco 8851?
8841/8851 series desk IP phone
Unplug the Ethernet cable from your Cisco IP phone. Wait 5 seconds. …
Plug the Ethernet cord into your phone. …
The Mute button will light up. …
The main phone screen will appear. …
Press the Settings (gear) button -> Admins Settings -> Reset Settings -> All Settings.