Cisco 6851 Mulitplatform SIP Phone | ProVu Communications

Cisco 6851 SIP Phone


The Cisco 6851 offers a budget-friendly, easy to use IP desk phone with multiplatform support for third-party hosted deployments. Featuring an attractive ergonomic design and Gigabit Ethernet connection as standard, the 6851 offers a reliable, secure device with a range of features including programmable line keys, tri-colour LEDs for waiting/incoming call indication and a 3.5" greyscale display with white backlighting for easy reading.

For additional functionality, users of the CP-6851 also have the option to add the 6800 key expansion module which provides an additional 28 function keys for easy access to contacts.

Offering a more advanced device in the 6800 range, the 6851 also supports the use of EHS adaptors for a wider variety of compatible headsets and connection via PoE.


  • 3.5" white backlit greyscale display (396×162 pixel)
  • 10/100/1000 Gigabit Ethernet Switch
  • Headset support:
    • Corded RJ9 connection
    • Support for wireless EHS headsets (requires EHS adaptor)
  • PoE Support
  • 4 SIP accounts
  • Compatible with the 6800 Key Expansion Module
  • Hands-free talking (speakerphone)
  • Wall mountable (optional wall mount kit available)
  • Hearing aid compatible (HAC) handset
  • Supported platforms include: Asterisk, Broadsoft, Centile and Metaswitch
  • Four programmable line/feature keys
  • Four programmable soft keys
  • Message waiting/incoming call indicator LED on handset
  • Colour: Charcoal
  • 1 year warranty

View Cisco 6851 SIP Phone Datasheet for full list of technical specifications

Ordering Information


Support & Downloads

Technical details

What's in the box

  • Phone
  • Handset
  • Curly cord
  • Network cable
  • Quick start guide


This product comes with a 1 year manufacturer's warranty.

Media downloads

Cisco 6851 (right)
High Resolution (PNG) | High Resolution | Web
Cisco 6851 (front)
High Resolution (PNG) | High Resolution | Web
Cisco 6800 series
High Resolution (PNG) | High Resolution | Web
Please Note: This is a SIP phone which forms part of Cisco's Multiplatform series and does not work with Cisco Call Manager