Cisco IP Phone 6851 VoIP Phone CP-6851-3PCC-K9=

Cisco 6851 Phone for MPP, Grey

Category : Cisco Collaboration
Brand : Cisco
Model : CP-6851-3PCC-K9=


The Cisco® IP Phone 6800 Series with Multiplatform Phone (MPP) Firmware is a cost-effective, high-fidelity voice communications portfolio designed to improve your organization’s person-to-person communications while reducing your operating costs on Cisco Webex Calling, Webex Calling Carrier, Cisco Broadworks and approved Unified-Communications-as-a-Service (UCaas) platforms.

Product overview

The Cisco IP Phone 6800 Series :

  • Cisco IP Phone 6821 with MPP Firmware, with 2 SIP registrations
  • Cisco IP Phone 6841 with MPP Firmware, with 4 SIP registrations
  • Cisco IP Phone 6851 with MPP Firmware, with 4 SIP registrations and support for 1 Key Expansion Module
  • Cisco IP Phone 6861 with MPP Firmware, with 4 SIP registrations with wired Ethernet and Wi-Fi Network Connectivity
  • Cisco IP Phone 6871 with MPP Firmware, with 6 SIP registrations, a USB port and a Color Display

The 6800 Series is ideal for businesses that want to update their phone systems from traditional analog or digital-based systems to an IP communications system with supported multiplatform call control systems. The 6841 and 6861 are ideal for home offices that do not have PoE switches.

An affordable way to purchase hardware

Cisco Webex Hardware as a Service provides a new way to purchase hardware with a simple, scalable and flexible way to pay. Stay up to date with the latest models of IP Phones and Webex Devices to enhance collaboration and create workspaces for the future. And get ready for all the power of Cisco's unified cloud platform! Learn more about Webex Hardware as a Service and the devices available.

Cisco IP Phone 6800 Key Expansion Module product overview

The Cisco IP Phone 6800 Key Expansion Module (KEM) extends the capabilities of the Cisco IP Phone 6851 with additional buttons. This module adds 14 physical buttons along with access to 14 additional buttons via the page buttons, for a total of 28 buttons. The KEM supports the Programmable Line Key (PLK) function, but does not support any SIP registrations. Calls may be monitored and answered using the PLK function, but calls may not initiated from the KEM. The 6851 IP phone supports 1 KEM only.

The 6800 KEM comes with a foot stand and cable to connect it directly to the base device in a traditional side-by-side configuration (Figure 2).

Cisco IP Phone 6800 Series features and benefits

Hardware features

  • Ergonomic design : An easy-to-use interface that provides a traditional telephony-like user experience.
  • Graphical display 
    • White backlit, grayscale, 3.5-in. (9-cm) 396 x 162-pixel display.
    • All models have scrollable access to calling features and text-based XML applications.
  • Handset
    • Supports either a narrowband or a wideband audio handset connected through an RJ-9 port.
    • All 6800 series handsets are Hearing-Aid-Compatible (HAC) and meet Federal Communications Commission (FCC) loudness requirements for the Americans with Disabilities Act (ADA). You can meet Section 508 loudness requirements by using industry-standard inline handset amplifiers such as Walker Equipment W-10 or CE-100 amplifiers. The dial pad on all 6800 series models is also ADA-compliant.
    • The 6800 series handsets produce a magnetic field that attracts small metallic objects such as pins and staples. To avoid possible injuries, do not keep small metallic objects close to the handset.
  • Headset
    • The 6800 series provides exceptional noise isolation when used with a Cisco Headset.
    • The analog headset jack is a wideband-capable RJ-9 audio port for the 6821, 6841, 6851, 6861 and 6871 models.
    • The 6871 also has a USB port for use with headsets.
    • For more information about Cisco’s headset offer:
  • Backlit indicator : Backlit indicators on the audio path keys (handset, headset, and speakerphone), mute key, select key, line keys and message waiting.
  • Volume control : A volume-control toggle provides easy decibel-level adjustments of the handset, monitor speaker, and ringer.
  • Full-duplex speakerphone : A full-duplex speakerphone gives you flexibility in placing and receiving calls. For added security, the Audible Dual-Tone Multi-frequency (DTMF) tones are masked when the speakerphone mode is used.
  • Single-position foot stand : The foot stand holds the phone in a single position, making the display easy to view and the buttons easy to use while sitting down. You can remove the foot stand for wall mounting. There are mounting holes located on the back of the phone.
  • Wall-mountable : Can be wall-mounted using the optional 6800 Series wall-mount kit (sold separately).
  • Keys
    • Lines
    • Softkeys
    • Two-way navigation and select
    • Service
    • Standard keypads
    • Volume control toggle
    • Speakerphone, headset, and mute
    • Other than the primary line assignment on the first line key, the other keys may be configured as user-customizable, or system administrator-customizable Programmable Line Keys (PLKs)
  • Ethernet cables
    • Category 3, 5, 5e, and 6 for 10-Mbps cables with 4 pairs
    • Category 5, 5e, and 6 for 100-Mbps cables with 4 pairs
    • Category 3, 5, 5e, and 6 for 1000-Mbps cables with 4 pairs
  • Power features
    • IEEE PoE
    • power consumption does not exceed 6.49W.
  • Power adapter with country clips
    • 6800 Series regional power adapters are available for powering the 6821, 6841, 6851, 6861 and 6871 when used in non-PoE deployments.
  • Cisco power injector
    • The 6851 and 6871 are compatible with the Cisco Unified IP Phone Power Injector (CP-PWR-INJ), and with the Cisco Aironet ® Power Injector (AIR-PWRINJ5=).

Cisco IP Phone 6800 Key Expansion Module features and benefits

Illuminated buttons

  • Off (dark) : Button is not configured
  • Green, steady : Configured correctly and is in the idle state
  • Red, steady : In use and has an active call on it or has a parked call
  • Amber, flashing : A configuration error has occurred for this button

Illuminated page buttons

  • Off (dark) : Page not in focus
  • Green, steady : Page in focus
  • Amber, flashing : Page not in focus, with one or more alerting or on-hold calls present on page

Hardware and power-saving features

  • Graphical display : Two 3.5-in (9-cm) grayscale backlit LCD displays, 160 x 270 resolution
  • Directory number and feature buttons : The module has 14 physical buttons (28 using page keys)
  • Page buttons : Use the 2 page buttons to access each page of 14 buttons and provide phone status
  • Power Save Mode
    • The 6841, 6851, 6861 and 6871 support Power Save Mode.
    • When the Cisco IP Phone 6851 is placed in Power Save Mode, the 6800 KEM is also placed in Power Save Mode. Pressing the select button while the phone and KEM are in Power Save Mode will restart both the phone and the KEM

Features and specifications

  • Signaling protocol support : Session Initiation Protocol (SIP)
  • Full lines supported : 4 lines (SIP registrations)
  • Language support
    • Bulgarian
    • Catalan
    • Chinese (Simplified)
    • Chinese (Traditional, Hong Kong)
    • Croatian
    • Czech
    • Danish
    • Dutch
    • English (American)
    • English (United Kingdom)
    • Finnish
    • French (France)
    • Greek
    • Spanish (Colombia)
    • German
    • Hungarian
    • Italian
    • Japanese
    • Korean
    • Norwegian
    • Polish
    • Portuguese (Portugal)
    • Russian
    • Spanish (Spain)
    • Slovak
    • Swedish
    • Slovenian
    • Turkish
  • Multiple ring tones : The phones support user-adjustable ring tones
  • Quality-of-Service (QoS) options : The phone supports Cisco Discovery Protocol and 802.1Q/p standards, and can be configured with an 801.1Q VLAN header containing the VLAN ID overrides configured by the admin VLAN ID
  • Security : 
    • 802.1X authentication
    • Device authentication
    • Encrypted configuration files
    • File authentication
    • Image authentication
    • Manufacture-Installed Certificates
    • Media encryption using SRTP with Advanced Encryption Standard AES-128 or AES-256
    • Signaling encryption using TLS with AES-128 or AES-256
  • Configuration options : The user can configure the IP address assignment statically or through the DHCP client
  • Physical dimensions (HxWxD) : 8.2 x 8.1 x 1.3 in. (207 x 206 x 33 mm) (excluding foot stand)
  • Weight : 22 oz. (615 g) (excluding foot stand, handset, and package), 24 oz. (682 g) (including foot stand, excluding handset and package)
  • Display : 3.5 in. (9 cm), 396 x 162 pixels
  • Ethernet switch : A 10/100/1000BASE-T Ethernet connection through two RJ-45 ports; one for the LAN connection and the other for a downstream Ethernet device connection such as a PC
  • Phone and KEM casing composition : Polycarbonate Acrylonitrile Butadiene Styrene (ABS) textured plastic
  • Power requirements : Must be powered with the supplied 5V DC country-specific power supply, which is included with the phone
  • Operational temperature : 32° to 104°F (0° to 40°C)
  • Nonoperational temperature shock : 14° to 140°F (-10° to 60°C)
  • Humidity :
    • Operating 10% to 90%, noncondensing
    • Non-operating 10% to 95%, noncondensing
  • Certification and compliance
    • Regulatory compliance:
      • CE Markings per directives 2004/108/EC and 2014/30/EU
    • Safety:
      • UL 60950 Second Edition
      • CAN/CSA-C22.2 No. 60950 Second Edition
      • EN 60950 Second Edition (including A11 and A12)
      • IEC 60950 Second Edition (including A11 and A12)
      • AS/NZS 60950
    • EMC – Emissions
      • 47CFR Part 15 (CFR 47) Class B
      • AS/NZS CISPR32:2015 Class B
      • CISPR 32: 2015_COR1:2016 Class B
      • EN55032: 2015+AC:2016
      • ICES003 Class B
      • EN61000-3-2:2014 and IEC 61000-3-2:2014
      • EN61000-3-3:2013 and IEC61000-3-3:2013
    • EMC – Immunity
      • EN55024
      • CISPR24
      • Armadillo Light
    • Telecom
      • FCC Part 68 HAC
      • CS-03-HAC
      • AS/ACIF S004
      • AS/ACIF S040
      • NZ PTC 220
    • Industry standards: TIA 810 and TIA 920
    • Industry standards: IEEE 802.3 Ethernet, IEEE 802.3af (for CP-6851 only)
    • Radio (for CP-6861 only)
      • FCC Part 15
      • EN 300.328
      • EN 301-489-1
      • EN 301-489-17
      • EN 301-489-3
      • NCC LP0002
      • EN 301 893
      • EN 300 330
      • RSP-100-11
      • RSS- Gen
      • RSS-102
      • RSS-210
      • RSS-247-2