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Cisco IP Phone 8851

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User Manual for Cisco IP Phone 8851

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Cisco IP Phone 8851 Contents of the user manual for the Cisco IP Phone 8851
  • Product category: Telephones Cisco
  • Brand: Cisco
  • Description and content of package
  • Technical information and basic settings
  • Frequently asked questions – FAQ
  • Troubleshooting (does not switch on, does not respond, error message, what do I do if...)
  • Authorized service for Cisco Telephones

User manual for the Cisco IP Phone 8851 contain basic instructions that need to be followed during installation and operation. Before starting your appliance, the user manual should be read through carefully. Follow all the safety instructions and warnings, and be guided by the given recommendations. User manual is an integral part of any Cisco product, and if it is sold or transferred, they should be handed over jointly with the product. Following the instructions for use is an essential prerequisite for protecting health and property during use, as well as recognition of liability on the part of the manufacturer for possible defects should you make a warranty claim. Download an official Cisco user manual in which you will find instructions on how to install, use, maintain and service your product.

And do not forget – unsuitable use of a Cisco product will considerably shorten its lifespan!

Product description

Boost your organization's IP telephony capabilities with the IP Phone 8851 from Cisco. Equipped with a 5" WVGA color display and a full-duplex speakerphone, this wall-mountable white IP Phone 8851 boasts wideband audio support, five programmable line keys, a two-port 10/100/1000 Mb/s Ethernet switch for connecting to your corporate network, PoE+ (Power over Ethernet) support, Bluetooth support for wireless headsets, and a USB Type-A port for charging your smartphone. Support for Cisco Intelligent Proximity allows you to routing a nearby mobile call through the IP Phone 8851's headset or speakerphone.
  • The IP 8851 Phone's standard wideband-capable audio handset connects through an RJ9 port. The 21" (or 71" when fully extended) standard coiled cord has a custom end for concealed cable routing beneath the phone. The handset is hearing aid-compatible (HAC) and meets Federal Communications Commission (FCC) loudness requirements for the Americans with Disabilities Act (ADA). You can achieve Section 508 loudness requirements by using industry-standard inline handset amplifiers such as Walker Equipment W-10 or CE-100 amplifiers. The dial pad is also ADA-compliant.
  • A full-duplex speakerphone gives you flexibility in placing and receiving hands-free calls. For added security, the audible dual tone multifrequency (DTMF) tones are masked when the speakerphone mode is used.
    Analog Headset Support
  • The analog headset jack is a standard wideband-capable RJ9 audio port.
    AUX Port
  • You can use an auxiliary port to support electronic hookswitch control with a third-party headset.
    USB Port
  • A side USB port enhances the usability of call handling by enabling wired or wireless headsets, and it also provides up to 500mA power output at 5V or 2.5W for smartphone charging.
    Ethernet Switch
  • An internal 2-port Cisco Ethernet switch allows for a direct connection to a 10/100/1000 Mb/s Ethernet network (802.3i/u/ab) through an RJ45 interface with single LAN connectivity for both the phone and a co-located PC. The system administrator can designate separate VLANs (802.1q) for the PC and phone, providing improved security and reliability of voice and data traffic.
    Bluetooth Support
  • Bluetooth 3.0 Enhanced Data Rate (EDR) Class 1 technology (up to 66' range) is supported. Hands-Free Profile (HFP) support allows for untethered headset connections and voice communications. Phone Book Access Profile (PBAP) is supported for phone book object exchange between devices.
    Power-Saving Features
  • Support for Cisco EnergyWise technology helps to make the Cisco IP Phone 8851 more energy-efficient and eco-friendly. The phone is also ENERGY STAR-certified.
    Backlit Indicator
  • The phone supports backlit indicators for the audio path keys (handset, headset, and speakerphone), select key, line keys, and message waiting.
    Replaceable Bezel
  • The phone includes a black bezel; an optional silver bezel is also available.
    Dual-Position Foot Stand
  • The two-position foot stand supports viewing angles of 35/50°. You can remove the foot stand for wall mounting, with mounting holes located on the base of the phone.
  • You can install the phone on a wall using an optional wall-mount kit.
    Key Expansion Module (KEM) Support
  • The phone supports up to two KEMs to expand from 5- to 77-line buttons, giving you access to many speed dials or programmable features, as well as the ability to monitor multiple lines.
    Power over Ethernet (PoE) Support
  • The phone is compatible with both IEEE 802.3af and 802.3at switch blades and supports both Cisco Discovery Protocol and Link Layer Discovery Protocol-Power over Ethernet (LLDP-PoE).
    Cisco IP Phone Power Cube 4 Support
  • This optional power cube is used as an AC-to-DC (48V) power supply for non-PoE deployments. Use of the Power Cube 4 also requires the use of one of the corresponding AC country cords.
    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 on your mobile device from the IP Phone 8851, while contact synchronization allows you to synchronize the contact objects from your mobile device.
    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.
In the Box Cisco IP Phone 8851 (White)
  • Limited 1-Year Warranty
  • Table of Contents

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    Technical parameters

    Cisco CP-8851-W-K9 Specs

    Ports 1 x 10/100/1000 Mb/s PoE+ Ethernet (Uplink)
    1 x 10/100/1000 Mb/s Ethernet (LAN)
    1 x USB Type-A (500 mA @ 2.5/5 W)
    2 x RJ9
    1 x RJ11 AUX
    Cord Length 21" / 53.3 cm (Coiled)
    72" / 182.9 cm (Extended)
    Keys 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
    Bluetooth Bluetooth 3.0 Enhanced Data Rate (EDR) Class 1
    Hands-Free Profile (HFP)
    Phone Book Access Profile (PBAP)
    Display 5" WVGA 24-Bit Color
    Codecs G.711 A-Law and Mu-Law, G.722, G.729a, Internet Low Bitrate Codec (iLBC), and Internet Speech Audio Codec (iSAC)
    Call Functions + Dialing
    Abbreviated Dialing
    Adjustable Ring Tones and Volume Levels
    Adjustable Display Brightness
    Agent Greeting
    Auto-Detection of Headset
    Busy Lamp Field (BLF)
    Busy Lamp Field (BLF) Pickup
    Busy Lamp Field (BLF) Speed Dial
    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
    Immediate Divert
    Malicious-Caller ID
    Message-Waiting Indicator (MWI)
    Meet-Me Conference
    Music on Hold (MoH)
    Network Profiles (Automatic)
    On- and Off-Network Distinctive Ringing
    Personal Directory
    Predialing before Sending
    Private Line Automated Ringdown (PLAR)
    Ring Tone per Line Appearance
    Service Uniform Resource Locator (URL)
    Shared Line
    Silent Monitoring and Recording
    Speed Dial
    Time and Date Display
    Uniform Resource Identifier (URI) Dialing
    Visual Voice Mail
    Voice Mail
    Whisper Coaching
    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)
    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
    Call Control Compatibility Cisco Unified Communications Manager: 8.5.1 (Non-Secured Mode Only), 8.6.2, 9.1.2, 10.5.2, 11.0 and Later
    Cisco Unified Communications Manager Express (Unified CME): 10.0 and Later through Fast Track
    Cisco Business Edition 6000 (BE 6000): 8.6.2, 9.1.2, 10.5.2, 11.0 and Later
    Cisco Hosted Collaboration Solution (HCS): 8.6.2 and Later (Using Supported UCM Versions Above)
    Physical Security Kensington Security Slot (K-Slot)
    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
    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)
    Phone-Casing Composition Polycarbonate Acrylonitrile Butadiene Styrene (ABS) Textured Plastic; Cosmetic Class A
    Operational Temperature 32-104°F / 0-40°C
    Storage Temperature 14-140°F / -1-60°C
    Operating Humidity 10-90%
    Storage Humidity 10-95%
    Agency Certifications Regulatory Compliance
    • CE Markings per Directives 2004/108/EC and 2006/95/EC
    • 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
    • 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)
    • 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
    Dimensions (WxHxD) 9.02 x 10.13 x 1.57" / 229.1 x 257.34 x 40 mm (Excluding Foot Stand)
    Weight 2.62 lb / 1.19 kg


    60% users recommend this product to others. And what about you?
    Rating: 3 of 5

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