Supports Webex Calling
All phones come individually boxed with a Handset, Ethernet cable and Curly cord
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The Cisco IP Phone 8851 (CP-8851-K9) is a cutting-edge business-class VoIP phone made to provide mobile device integration and safe, high-fidelity conversations for busy workplaces. This model is perfect for professionals who require easy access to unified communications, whether they are working remotely or in the office, due to its ergonomic, contemporary design and bright 5-inch high-resolution color display. By utilizing Cisco Intelligent Proximity, the 8851 allows users to pair their own mobile devices for flexible call management and desk-based audio sharing. This phone greatly improves productivity and collaboration across on-premises, hosted, and third-party platforms with its wideband audio, always-on reliability and encrypted voice communications. A variety of accessories are further supported with integrated USB, Bluetooth and Gigabit Ethernet connectivity, making this an investment that is ready for the future for any expanding business.
• 5" High-Resolution Color Display with 800 x 480 pixel widescreen, backlit for easy navigation and outstanding user experience.
• Five Programmable Line Keys that are configure for multiple numbers, speed dial, or advanced call features—including multicall-per-line functionality.
• Cisco Intelligent Proximity that seamlessly integrates mobile devices, allowing users to move calls or audio from mobile to desk phone for superior sound.
• Wideband Audio & Noise Cancellation with crystal-clear voice quality via handset, speakerphone and compatible headsets.
• Bluetooth & USB Connectivity with native Bluetooth for wireless headsets or device pairing and USB port for charging or accessory expansion.
• Dual Gigabit Ethernet Ports (PoE) with fast, secure PC pass-through and simplified installation using Power over Ethernet.
• Comprehensive Security with encrypted voice, secure boot, device authentication and media/signaling encryption for enterprise-grade protection.
• Flexible Deployment that supports Cisco on-premises, hosted, Webex Calling and third-party SIP call control platforms.
• EnergyWise & Eco-Conscious Design with low power operation and construction with recycled materials to support sustainability initiatives.
• Key Expansion Module Support with optional add-on for extended status detail and simplified management of high call volumes.
🗹 Five-line support, programmable keys and one-touch features simplify multitasking and streamline workflows for busy users.
🗹 Intelligent Proximity bridges mobile devices and desktop calls, enhancing flexibility and productivity at the workstation.
🗹 Wideband audio, noise cancellation and advanced echo suppression deliver clear, professional communications, even in noisy settings.
🗹 Enterprise-grade encryption and “always-on” uptime ensure every conversation is protected and dependable.
🗹 Easily deploy across offices with PoE and dual Gigabit ports; unified firmware and cloud/third-party compatibility for diverse networks.
🗹 Large color display, easy navigation and customizable line keys minimize training time and maximize comfort.
🗹 EnergyWise technology reduces operational costs and supports organizational sustainability goals.
| Manufacturer | Cisco |
| Manufacturer Part Number | CP-8851-K9 |
| Product Name | Cisco IP Phone 8851 |
| Product Type | IP Phone |
Compatible Platforms | Cisco Business Edition 6000 |
Body Material | ABS plastic |
Wireless Interface Provided | Bluetooth |
Bluetooth Profiles | Hands-Free Profile (HFP), Phonebook Access Profile (PBAP) |
Call Services | Voice Mail, Caller ID, Call Waiting, Call Forwarding, Call Transfer, Call Hold, Message Waiting Capability |
Key Expansion Module Max Qty | 2 |
Dialer Type | Keypad |
Dialer Location | Base |
Conference Call Capability | Yes |
Intercom | Yes |
Speakerphone | Yes (digital duplex) |
Menu Operation | Yes |
Programmable Buttons Qty | 5 |
Indicators | Voice message waiting indicator, speakerphone indicator, headset |
Firmware Upgradable | Yes |
Additional Functions | Call timer, Intercom |
Additional Features | Music on hold, BLF status lamps, compatible with Bluetooth headsets |
Main Features | Multiple VoIP protocol support, integrated Ethernet switch |
VoIP | Yes |
VoIP Protocols | SIP, RTCP, RTP, SRTP, SDP |
Voice Codecs | G.722, G.729a, G.711u, G.711a, iLBC, iSAC |
Lines Supported | 5 lines |
Quality of Service | IEEE 802.1Q (VLAN), IEEE 802.1p |
Security | IEEE 802.1X, TLS |
Power Over Ethernet (PoE) Support | Yes |
Network Protocols | IP, TFTP, UDP, Cisco Discovery Protocol (CDP), HTTP, DNS, HTTPS, SRTP, Link Layer Discovery Protocol - Media Endpoint Discovery (LLDP-MED), RTCP, RTP |
Network Ports Qty | 2 x Ethernet 10Base-T/100Base-TX/1000Base-T |
Compatible Software | Cisco Unified Communications Manager 8.5.1 or later, Cisco Hosted Collaboration Solution, Cisco Unified Communications Manager Express 10.0 or later |
Network Features | Class 3 PoE |
Type | LCD display - color |
Display Location | Base |
Diagonal Size | 5" |
Display Resolution | 800 x 480 pixels |
Color Depth | 24-bit (16.7 million colors) |
Backlit | Yes |
Display Languages | Danish, Hebrew, Hungarian, Czech, Croatian, Slovenian, Thai, Slovak, Brazilian Portuguese, English, German, French, Italian, Norwegian, Portuguese, Polish, Finnish, Swedish, Russian, Spanish, Dutch, Greek, Turkish, Arabic, Bulgarian, Latvian, Lithuanian, Estonian, Serbian, Romanian, Catalan, Japanese, Chinese, Korean |
Connections | Headset jack / RJ-9 ¦ Electronic hook switch (EHS) ¦ USB |
Hearing Aid Compatible | Yes |
Placing / Mounting | Wall-mountable, table mount |
Compliant Standards | CISPR 22 Class B, CISPR 24, EN 61000-3-2, EN 61000-3-3, EN55024, EN55022 Class B, ICES-003 Class B, AS/ACIF S004, RSS-210, RSS-102, FCC Part 68, ADA, CS-03, UL 60950-1 Second Edition, EN 60601-1-2, FCC CFR47 Part 15 B, GB 4943, AS/NZS 60950, HAC (Hearing Aid Compatible), CSA C22.2 No. 60950-1 Second Edition, EN 60950-1 Second Edition, IEC 60950-1 Second Edition, EN 300 328, EN 301 489-1, EN 301 489-17 |
Width | 10.1 in |
Depth | 1.6 in |
Height | 9 in |
Weight | 2.6 lbs |