Cisco 8851 IP Phone for Flexible Office Communications
Experience the utmost audio excellence with high-quality, full-duplex, wideband sound featuring superior echo cancellation, ensuring unparalleled audio quality for seamless communication with both internal and external stakeholders. Your company’s image is paramount, and our commitment to exceptional phone sound ensures every call leaves a lasting impression.
A reliable desk phone designed for busy teams—with crystal-clear audio, mobile integration, and dedicated Australian support.
In a world of digital noise, clarity is a competitive advantage. It’s the sound of a voice, pure and focused, cutting through the static of a thousand distractions. It’s the confidence of knowing you are being heard exactly as you intend.
The Cisco 8851 IP Phone is designed to deliver that advantage, built for discerning Australian teams who understand that in business, the clearest voice always wins.
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Why Choose the Cisco 8851 IP Phone?
Cisco 8851 at a Glance:
- Purpose: Enterprise-grade IP phone for knowledge workers and high-volume roles.
- Display: 5-inch, widescreen colour LCD (800×480).
- Connectivity: Gigabit Ethernet (PoE Class 3), Bluetooth, USB & RJ-9 headset ports.
- Key Feature: Cisco Intelligent Proximity for effortless mobile device integration.
Support: Backed by Telex’s Sydney-based specialists and fast deployment.
Product Details
Enterprise-level communication
Embrace the demands of a modern workplace with the Cisco 8851, delivering efficient and top-notch communication channels that meet the highest standards. Enhance your professional interactions with its enterprise-level connection, enabling seamless voice collaboration. Experience unrivaled productivity and streamlined communication with integrated mobile device integration and a suite of best-in-class features.
Efficient, Flexible and Easy-to-use
Immerse yourself in seamless usability and enhanced visibility with the Cisco 8851's high-resolution, five-inch, widescreen colour display. Effortlessly navigate through crucial features and caller information, ensuring a streamlined communication experience. Stay productive and flexible with the convenience of a full-duplex speakerphone, enabling hands-free calling throughout your day
Advanced features that meet your needs. All in one device
Empower global users with the Cisco 8851's localised language support, including right-to-left on-screen text, facilitating seamless international communication. Harness the power of efficient and effective collaboration through an extensive suite of unified communication features, enabling smooth and streamlined communication experiences for your business.
Low energy cost in off-work hours. Thanks to modern technology
Embrace the sustainability revolution with the Cisco 8851, incorporating Cisco EnergyWise technology to prioritsie energy efficiency and environmental responsibility. With its Energy Star qualification, this phone sets a new standard for eco-conscious communication solutions, reducing energy consumption and minimizing environmental impact.
Key Features of the Cisco 8851 IP Phone
The 8851 Cisco phone is engineered for productivity, with every feature designed to remove interruptions and streamline communication:
- High-Definition Wideband Audio: Hear and be heard with studio-grade clarity. The full-duplex speakerphone and advanced echo cancellation reduce misunderstandings and the need to repeat information on important calls.
- 5-Inch Widescreen Colour Display: See caller details, manage multiple lines, and navigate features with ease. The large, intuitive screen helps reduce dialling errors and speeds up call handling for your team.
- Intelligent Mobile Integration: Pair your mobile via Cisco Intelligent Proximity to instantly move an active call to your desk phone for superior audio, without dropping the connection or asking the other person to call back.
- Flexible Headset Compatibility: Connect the way you want. The Cisco 8851 offers integrated Bluetooth for wireless freedom, a USB port for modern wired headsets, and an RJ-9 jack for traditional models.
- Energy-Efficient Design: Cisco EnergyWise technology reduces power consumption during off-work hours. This Energy Star qualified device helps lower your operational costs and supports your sustainability goals.
Perfect for Productive Australian Teams
The Cisco 8851 is a versatile and secure endpoint that excels in a variety of business roles:
- For the IT Manager: Designed for simple, large-scale deployment. Zero Touch Provisioning reduces IT workload, while enterprise-grade security features like secure boot and SRTP encryption protect your network and conversations.
- For the Receptionist or Administrator: Handles high call volumes effortlessly. Add up to two Key Expansion Modules (KEMs) to create a powerful call-handling console with dozens of extra programmable line and feature keys.
- For the Hybrid or Remote Worker: Delivers a secure, feature-rich office experience from any location. It provides a professional audio endpoint that is often superior to a laptop’s built-in microphone, instilling confidence on every call.
Cisco 8851 Headset and Accessory Setup
The Cisco 8851 headset compatibility is built for flexibility. Here’s how to set up the Cisco 8851 headset in Bluetooth, USB, and RJ-9:
- Bluetooth: Place your headset in bluetooth pairing mode, then navigate to Applications > Bluetooth on the phone to scan and connect.
- USB: Simply plug your compatible USB headset directly into the USB port on the side of the phone.
- RJ-9: Plug your corded headset directly into the dedicated headset port on the back of the device.
How it Compares: The Cisco 8800 Series
Find the right phone for every role. See how the Cisco 8851 fits within the popular 8800 series:
Cisco 8841 IP Phone
- Best For:
Standard office users & cubicles - Key Difference:
Core HD audio & display, no mobile integration or USB
Cisco 8851 IP Phone
- Best For:
Busy professionals & remote workers - Key Difference:
Adds Bluetooth & mobile integration (Intelligent Proximity)
Cisco 8865 IP Phone
- Best For:
Executives & key collaborators - Key Difference:
Adds 720p HD video capability and built-in Wi-Fi
| Model | Best For | Key Difference |
|---|---|---|
| Cisco 8841 IP Phone | Standard office users & cubicles | Core HD audio & display, no mobile integration or USB |
| Cisco 8851 IP Phone | Busy professionals & remote workers | Adds Bluetooth & mobile integration (Intelligent Proximity) |
| Cisco 8865 IP Phone | Executives & key collaborators | Adds 720p HD video capability and built-in Wi-Fi |
Explore our full range of IP Handsets or talk to a specialist to find the perfect fit.
Frequently Asked Questions
Is the Cisco 8851 compatible with wireless headsets?
Yes. The Cisco 8851 has integrated Bluetooth for easy pairing with wireless headsets. For a non-Bluetooth wireless option, you can also use a DECT headset with a base station connected via the USB or RJ-9 port.
What power options does the Cisco 8851 have?
The phone supports Power over Ethernet (PoE) Class 3, allowing it to be powered by a single network cable. If your network doesn’t have PoE, it can be powered by an optional external power adapter.
Will this phone work with Cisco Webex or our cloud phone system?
Yes. The Cisco 8851 IP phone supports the SIP protocol, making it fully compatible with Cisco Webex, on-premise solutions like a Business Phone System, and other leading cloud platforms.
Get Expert Advice & Fast Deployment
The clearest voice wins, but the right hardware is only half the battle… Our Sydney-based specialists work with you to design, deploy, and support a communication platform that gives your team a definitive edge. Let’s build your communication advantage.
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Technical Specifications
Full lines supported
10 lines (SIP registrations)
Audio features
G.711 a-law and mu-law, G.722, G.729a/b, Internet Low Bitrate Codec (iLBC), and Internet Speech Audio Codec (iSAC), G.722.1, G.772.2, OPUS
Flexibility in placing and receiving calls with hands free thanks to a full-duplex speakerphone
Automatic Gain Control
Comfort Noise Generation
Silence Suppression/Voice Activity Detection
Acoustic Echo Cancellation (AEC)
Dynamic Noise Reduction
Telephony features
+ 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), BLF Pickup & speed dial
Callback
Call forward & call forward notification
Call filter & history lists
Hold, park & pickup call
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
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
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
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
SSL-based VPN client
Cisco applications
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
Weight
1.19 kg
Size (H x W x D)
229.1 mm x 257.34 mm x 40 mm
Language support
Arabic, Bulgarian, Catalan, Chinese, Croatian, Czech, Danish, Dutch, English, Estonian, French, Finnish, German, Greek, Hebrew, Hungarian, Italian, Japanese, Latvian, Lithuanian, Korean, Norwegian, Polish, Portuguese, Portuguese, Romanian, Russian, Spanish, Slovak, Swedish, Serbian, Serbian, Slovenian, Thai, Turkish
User interface
An easy-to-use interface that provides a traditional telephony-like user experience
The 800 × 480, 24-bit color, 5-in. WVGA display provides scrollable access to calling features and text-based XML applications
The 8851 has the following 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
Power
IEEE Power over Ethernet class 3 for hardware version prior to V08, class 4 for hardware version V08 and above. In PoE class 3 case, one KEM can be attached and powered up through PoE together with the host 8851 phone, in PoE class 4 case, two KEMs can be attached and powered up through PoE together with the host 8851 phone.
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 Webex
Explore the comprehensive suite of Cisco Webex services offered by Telex, empowering businesses with advanced collaboration tools for seamless communication, virtual meetings, and enhanced productivity. Discover how Cisco Webex can transform the way you work and connect with teams, clients, and partners across the globe.
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