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11 Review(s)
Model: CP-8851-K9 Cisco 8800 IP Phone
Detail: Cisco IP Phone CP-8851-K9, BYOD, widescreen VGA, Bluetooth, High-quality Voice Communication
List Price: US$615.00
Price: $246.39
You save: US$368.61 (60% OFF)
Condition: Brand New Sealed
Availability: In stock
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US$ 246.39 In stock Brand New Sealed

CP-8851-K9 SMARTnet Service Tool

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Overview (CP-8851-K9)

Cisco CP-8851-K9 integrates 5 inches high-resolution widescreen VGA backlit color display. It supports Localized language to meet the needs of global users. Bluetooth 3.0 supports phone book object exchange between devices, two USB ports enhance the usability of call handling by enabling wired or wireless headsets, as well as provide charging capability to mobile devices such as smartphones or tablets. The five programmable line keys support multiple directory numbers or calling features.

Quick Specs

Figure 1 shows the appearance of the CP-8851-K9.


Table 1 shows the Quick Spec.

Product Code



5” high-resolution (800 x 480) WVGA color display

Ethernet Switch


Programmable Line Keys


Number of Line Keys


Full Duplex Speakerphone


Wideband Audio


PoE Classification

Class 3

Bluetooth / DECT


USB (Physical Ports)

2 Ports

KEM (Key Expansion Module)

Two Optional KEM

Third-party Call Control


Replaceable Bezel

Yes (Black, Silver)

Wall Mountable


Product Details

Before you use the Cisco IP Phone 8851, it connects to the corporate IP telephony network.

Figure 2 shows the bottom ports of this IP Phone.

CP-8851-K9 Back Panel




AC power wall plug (optional)

Network port (10/100 SW) connection. IEEE 802.3af power enabled.

Access port (10/100 PC) connection.

Auxiliary port (optional).

Handset connection.

Analog headset connection (optional).

2 USB ports

Figure 3 shows the buttons and hardware.

CP-8851-K9 Front Panel






Handset light strip

Mute button

Programmable feature

buttons and Session


Headset button

Phone screen


Softkey buttons

Volume button

Navigation cluster and Select button

Applications button

Release Button

Messages button

Transfer button

Contacts button

Hold/Resume button

Back button

Conference button


Speakerphone button


Figure 4 shows key expansion module.

CP-8851-K9 with key expansion module

CP-8851-K9 offers up to two optional Key Expansion Modules. The modules should order separately.

Compare to Similar Items

Table 2 shows the comparison of Cisco IP Phone 8811, 8831, 8841 and 8851.






Ethernet Switch





Programmable Line Keys





Number of Line Keys





Full Duplex Speakerphone





Wideband Audio





PoE Classification

Class 2

Class 3

Class 2

Class 3

Bluetooth / DECT


DECT (mics)



Third-party Call Control





Replaceable Bezel

Yes (Black, Silver)


Yes (Black, Silver)

Yes (Black, Silver)

Wall Mountable





Get more information

Do you have any question about the Cisco IP Phone 8851/K9?

Contact us now via Live Chat or cisco@router-switch.com.


Specification (CP-8851-K9)

CP-8851-K9 Specifications

Audio codec support

  • G.711 a-law and mu-law, G.722, G.729a, Internet Low Bitrate Codec (iLBC), and Internet Speech Audio Codec (iSAC)

Key call features support

  • + Dialing
  • Abbreviated dialing
  • Adjustable ring tones and volume levels
  • Adjustable display brightness
  • Agent greeting
  • Auto-answer
  • Auto-detection of headset
  • cBarge
  • Busy Lamp Field (BLF)
  • Busy Lamp Field (BLF) Pickup
  • Busy Lamp Field (BLF) speed dial
  • Callback
  • Call forward
  • Call forward notification
  • Call filter
  • Call history lists
  • Call park
  • Call pickup
  • Call timer
  • Call waiting
  • Call chaperone
  • Caller ID
  • Corporate directory
  • Conference, including traditional Join feature
  • Cross Cluster Extension Mobility (EMCC)
  • Direct transfer
  • Extension mobility
  • Fast-dial service
  • Forced access codes and client matter codes
  • Group call pickup
  • Hold
  • Intercom
  • Immediate divert
  • Malicious-caller ID
  • Message-waiting indicator (MWI)
  • Meet-me conference
  • Mobility
  • Music on hold (MoH)
  • Mute
  • Network profiles (automatic)
  • On- and off-network distinctive ringing
  • Personal directory
  • PickUp
  • Predialing before sending
  • Privacy
  • Private Line Automated Ringdown (PLAR)
  • Redial
  • Ring tone per line appearance
  • Service Uniform Resource Locator (URL)
  • Shared line
  • Silent monitoring and recording
  • Speed dial
  • Time and date display
  • Transfer
  • Uniform Resource Identifier (URI) dialing
  • Visual voice mail
  • Voice mail
  • Whisper coaching

Electronic hookswitch

  • You can control the hookswitch electronically with a third-party headset connected to either the USB port or auxiliary port, or directly paired with the phone through bluetooth.

Cisco Intelligent Proximity

  • Audio path moving sends audio through the IP Phone 8851 for a mobile device-connected call.
  • Call history synchronization allows you to view placed and missed calls of your mobile device from the
    IP Phone 8851.
  • Contact synchronization allows you to synchronize the contact objects from your mobile device to your
    IP Phone 8851.

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.

Network features

  • Session Initiation Protocol (SIP) for signaling
  • Session Description Protocol (SDP)
  • IPv4 and IPv6
  • User Datagram Protocol (UDP) (used only for Real-Time Transport Protocol [RTP] streams)
  • Dynamic Host Configuration Protocol (DHCP) client or static configuration
  • Gratuitous Address Resolution Protocol (GARP)
  • Domain Name System (DNS)
  • Trivial File Transfer Protocol (TFTP)
  • Secure Hypertext Transfer Protocol (HTTPS)
  • VLAN
  • Real-Time Transport Protocol (RTP)
  • Real-Time Control Protocol (RTCP)
  • Cisco Peer-to-Peer Distribution Protocol (PPDP)
  • Cisco Discovery Protocol
  • LLDP (including LLDP-MED)
  • Switch speed auto-negotiation

Security features

  • Secure boot
  • Secure credential storage
  • Device authentication
  • Configuration file authentication and encryption
  • Image authentication
  • Random bit generation
  • Hardware cryptographic acceleration
  • Certificate Authority Proxy Function (CAPF)
  • Manufacturer-Installed Certificates (MIC)
  • Locally Significant Certificates (LSC)
  • Ethernet 802.1x supplicant options: Extensible Authentication Protocol-Flexible Authentication via Secure Tunneling (EAP-FAST) and Extensible Authentication Protocol-Transport Layer Security (EAP-TLS)
  • Signaling authentication and encryption using TLS
  • Media authentication and encryption using SRTP
  • HTTPS for client and server
  • Secure Shell (SSH) Protocol server
  • Secure Sockets Later (SSL)-based VPN client

Physical dimensions
(H × W × D)

  • 9.02 x 10.13 x 1.57 in. (229.1 x 257.34 x 40 mm) (excluding foot stand)

Weight (with handset)

  • 2.62 lb (1.19 kg)

Phone-casing composition

  • Polycarbonate acrylonitrile butadiene styrene (ABS) textured plastic; Cosmetic class A

Operational temperature

  • 32 to 104°F (0 to 40°C)

Nonoperational temperature shock

  • 14 to 140°F (-10 to 60°C)


  • Operating 10 to 90%, noncondensing
  • Non-operating 10 to 95%, noncondensing

Language support

  • Arabic (Arabic Area)
  • Bulgarian (Bulgaria)
  • Catalan (Spain)
  • Chinese (China)
  • Chinese (Hong Kong)
  • Chinese (Taiwan)
  • Croatian (Croatia)
  • Czech (Czech Republic)
  • Danish (Denmark)
  • Dutch (Netherlands)
  • English (United Kingdom)
  • Estonian (Estonia)
  • French (France)
  • French (Canada)
  • Finnish (Finland)
  • German (Germany)
  • Greek (Greece)
  • Hebrew (Israel)
  • Hungarian (Hungary)
  • Italian (Italy)
  • Japanese (Japan)
  • Latvian (Latvia)
  • Lithuanian (Lithuania)
  • Korean (Korea Republic)
  • Norwegian (Norway)
  • Polish (Poland)
  • Portuguese (Portugal)
  • Portuguese (Brazil)
  • Romanian (Romania)
  • Russian (Russian Federation)
  • Spanish (Columbia)
  • Spanish (Spain)
  • Slovak (Slovakia)
  • Swedish (Sweden)
  • Serbian (Republic of Serbia)
  • Serbian (Republic of Montenegro)
  • Slovenian (Slovenia)
  • Thai (Thailand)
  • Turkish (Turkey)

Certification and compliance

  • Regulatory compliance

◦   CE Markings per directives 2004/108/EC and 2006/95/EC

  • Safety

◦   UL 60950 Second Edition

◦   CAN/CSA-C22.2 No. 60950 Second Edition

◦   EN 60950 Second Edition (including A11 & A12)

◦   IEC 60950 Second Edition (including A11 & A12)

◦   AS/NZS 60950

◦   GB4943

  • EMC - Emissions

◦   47CFR Part 15 (CFR 47) Class B

◦   AS/NZS CISPR22 Class B

◦   CISPR22: 2005 w/Amendment 1: 2005 Class B

◦   EN55022: 2006 w/Amendment 1: 2007 Class B

◦   ICES003 Class B

◦   VCCI Class B

◦   EN61000-3-2

◦   EN61000-3-3

◦   KN22 Class B

  • EMC - Immunity

◦   EN55024

◦   CISPR24

◦   EN60601-1-2

◦   KN24

◦   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 and 802.3at

◦   Korea (RRA Public Notification 2010-36, Nov 01, 2010)

◦   Korea (RRA Announce 2011-2, Feb 28, 2011)

  • Radio

◦   FCC Part 2.1093 (BT RF Exposure TR)

◦   RSS-102 (BT RF Exposure TR)

◦   RSS-210

◦   EN 300.328

◦   EN50385 (BT RF Exposure TR)

◦   EN 301-489-1

◦   EN 301-489-17

◦   NCC LP0002

◦   Korea (RRL No. 2006-128, RRL No. 2006-129)

◦   Japan Bluetooth GFSK/EDR

Shipping & Payment


Cargo will be delivered within 1 day after payment arrived. Tracking Number will be offered once delivery done.

Delivery OptionsEstimated Delivery Time
DHL 2-4 business days
Fedex 2-4 business days
Hong Kong EMS 5-10 business days
Hong Kong Air Parcel 10-20 business days
By Sea 10-20 business days


Above mentioned information are just for your reference only,we will keep you posted for the tracking delivery schedule.There are two delivery options available for by air and by sea:

Deliver to port:

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responsibility of the buyer. Router-switch will recommend trustworthy local freight forwarders to you.Router-switch.com can facilitate the progress under buyer's permission and at buyer's expense.

Deliver to door:

Router-switch.com will quote all destination charge prior once we have confirmed order.
Router-switch.com is responsible for transporting goods to door after you have made the payment.

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All items are ORIGINAL and GENUINE only.
Item conditions are "New Sealed" or "Used / Refurbished".
Used & refurbished items are fully tested with good conditions by Cisco-certified Engineers.

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Flexible Secure Payment & Shipment:

Verified authorization: Mcafee Secure, VeriSign Secured

Return Material Authorization (RMA) Process

Standard Hardware Warranty Policy:

Original new sealed Cisco product: 1 Year
Used Cisco product: 3 Month

The Support Contacts:

If your Cisco products failed, you must contact your sales representative to verify product failure. If the problem still can't correct by remote support methods i.e. email or phone support, the RMA procedure will issue.


Customer Reviews

4.5 5
4.5 (11 reviews)
5 Stars
4 Stars
3 Stars
2 Stars
1 Stars

Share your thoughts with other customers?

Posted on 11/1/2016
Verified Buyer
off-line communication

I called you, but on one answer it, so I left a message, then got your reply within 24 hours, it seems email is the best way to communicate with you

Posted on 9/19/2016
Verified Buyer
happy experience

never cooperate with you before, a little worried, for now, I'd like to recommend you to my friends

Posted on 8/14/2016
Verified Buyer
thanks so much

I had bad experience that purchase from HK, but for now, you changed my mind, a reliable supplier

Posted on 7/21/2016
Verified Buyer
CP-8851-K9-physical port

it has the 1 USB-physical port. But no wifi-802.11n connetion.

Posted on 7/5/2016
Verified Buyer

Great product, delivered timely and in great working order.

Posted on 7/4/2016
Verified Buyer
Great website!

It is really a good web, I like the design of this website.

Posted on 5/22/2016
Verified Buyer
Great price for this particular voip phone

It's the best price around for this particular voip phone, product shipped quickly, packaged properly, ready to go.

Posted on 5/3/2016
Verified Buyer
find this item finally

oh, keep to find this item for a long time, finally, I find it from you

Posted on 11/22/2015
Verified Buyer
cheaper purchase here~

Great Phone at a great price. This is cheaper than purchase from our Cisco partner, I'll probbly start buying our phones here instead.

Posted on 6/25/2015
Verified Buyer

CP-8851-K9 is able to charge personal smartphones through one standard USB port adjacent to the Key Expansion Module connector on the right of the endpoint.

Posted on 6/21/2015
Verified Buyer
Very good!

It has worked at my office for three weeks. I didn't find any problem. Good quality.

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