Cisco IP Phones

Cisco 8851 Series
The Cisco IP Phone 8851 delivers highly secure and powerful mission-critical voice communications that are easy to use. Wideband provides superior audio performance, while the widescreen color display eases menu navigation. The Cisco 8851 Series IP Phone can also support telephony feature integration with personal mobile devices. It also supports both on-premise and cloud deployments.
Cisco IP Phone 8851 Series :

Share Telephony Experiences with Desktop and Mobile
Easy-to-use, comprehensive set of mission-critical unified communications features make collaborating simple

High-quality, full-duplex, wideband audio and superior echo cancellation deliver exceptional clarity when communicating

Integrates telephony features with your personal mobile devices using Cisco Intelligent Proximity for Mobile Voice (

Optional Cisco IP Phone 8800 Key Expansion Module delivers simplified dialing and expanded status detail

Headset port, USB, and Bluetooth provide a choice in headsets from Cisco third-party vendor partners (

1 - Uses Bluetooth technology. For customers seeking the IP 8800 Key Expansion Module, but whose environments do not permit Bluetooth radios, a non-Bluetooth equipped version of the 8851 that supports the modules is available. Contact your Cisco representative for further details.

2 - Consult your preferred third-party headset vendor for compatible headsets on the IP Phone 8851.

Please contact for information about Supplies and Replacement Parts .
The Cisco IP Phones 8851 Series
Key Features to Enhance User Experience
Simpler and More Cost-effective Administration

On-premise and hosted Cisco and third-party hosted call control (3) provides flexible deployment options

Cisco Expressway gives remote workers single sign-on access without need for a VPN4 client

Cisco EnergyWise reduces energy cost and carbon footprint in off-work hours

Gigabit Ethernet and 802.3af/at Power over Ethernet reduce installation and infrastructure costs

Consolidates administration of software updates with common firmware to both IP Phone 8800 Series and IP Phone 7800 Series
3 - Telephony features will vary by vendor platform. Consult your Cisco representative for timing availability and feature details
Cisco 8851 IP Phone Specifications at a Glance


5-inch widescreen VGA (800x480 pixel), 24-bit color


G.722 on handset, speakerphone and headset

Yes; (Cisco Intelligent Proximity for Mobile Voice)

RJ-9; auxiliary port, USB, Bluetooth


Optional; Up to two (72 additional keys)

Programmable line and feature keys


Integrated switch

Wideband audio

Personal Mobile device integration

Headset ports

Wall-mount option

IP Phone 8800 Key Expansion Module
All Cisco IP Phone 8800 Series Brochures
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