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Cisco 8851 IP Phone CP-8851-K9
Inclusive of VAT · Warranty included
CISCO
Product Specification
| Brand | CISCO |
| SKU | PHONE-CISCO-8851-K9 |
| Product Type | IP Phone |
| Series | Cisco 8800 Series |
| Display | 5 Inch Color Display |
| Network Ports | Gigabit Ethernet Ports |
| Protocol Support | VoIP SIP Protocol |
| Voice Quality | HD Voice Quality |
| Power | PoE Powered Device |
| Expansion Support | Supports Expansion Modules |
| Form Factor | Desktop Office IP Phone |
About This Product
Overview
The Cisco 8851 IP Phone CP-8851-K9 is a business-focused desktop office phone built for organizations that need dependable voice communication and a familiar user experience. As part of the Cisco 8800 Series, it combines a 5 inch color display with Gigabit Ethernet connectivity and support for VoIP SIP protocol, making it a practical choice for office environments where call clarity and efficient access to phone functions matter. Its desktop design fits well into reception areas, workstations, shared desks, and other professional settings where a dedicated IP phone is preferred. The inclusion of HD voice quality helps support clearer conversations, while the color display provides a straightforward interface for everyday calling tasks. For buyers searching for a Cisco business IP phone with enterprise-oriented features, this model offers a balanced mix of usability and network-ready design.
Performance & Scalability
Designed for business communication workflows, the Cisco 8851 supports VoIP SIP protocol and Gigabit Ethernet ports, helping it integrate into modern networked voice deployments. The PoE powered design can simplify installation by reducing the need for a separate power adapter in supported environments, which is useful for organized office setups and managed deployments. HD voice quality is an important advantage for teams that rely on frequent phone calls, customer interactions, or internal coordination, as it helps deliver a more natural listening experience. Support for expansion modules also adds flexibility for users who need additional line appearances or more accessible call controls as their communication needs grow. This makes the phone suitable for scalable office use where different departments or users may require varying levels of functionality.
Storage Flexibility
While this product is not a storage device, its flexibility comes from the way it adapts to different office communication needs. The support for expansion modules allows the phone to be extended for more advanced call handling, which can be helpful in reception, administrative, or high-call-volume roles. Its desktop office form factor also makes it easy to place in a variety of workspace layouts without requiring specialized mounting or complex setup. Combined with Gigabit Ethernet connectivity and PoE support, the phone is well suited to structured network environments where clean deployment and reliable operation are important. For businesses standardizing on Cisco voice hardware, this model offers a practical platform that can fit into existing communication infrastructure.
Why Choose This Product?
The Cisco 8851 IP Phone CP-8851-K9 is a strong option for organizations looking for a business IP phone with a clear display, dependable network connectivity, and support for modern VoIP environments. It brings together features that matter in daily office use, including HD voice quality, Gigabit Ethernet ports, PoE powered operation, and expansion module support. These capabilities make it a versatile choice for users who need a professional desktop phone that can handle routine communication efficiently. As a Cisco 8800 Series model, it is positioned for business deployments where consistency, usability, and network compatibility are important. For IT teams and office buyers, it provides a straightforward way to equip workspaces with a capable IP phone built for professional communication.
Frequently Asked Questions
What type of phone is the Cisco 8851 CP-8851-K9?
It is a business IP phone designed for desktop office use.
Does this Cisco IP phone support VoIP?
Yes, it supports VoIP SIP protocol.
What display does the Cisco 8851 have?
It features a 5 inch color display.
Can this phone be powered with PoE?
Yes, it is a PoE powered device.
Does the Cisco 8851 support expansion modules?
Yes, it supports expansion modules for added flexibility.
Why Buy a Refurbished Products?
Refurbished enterprise servers offer enterprise-grade performance at a fraction of the new price.
Up to 70% Cost Savings
Refurbished R650xs units deliver identical hardware capability to new, at significantly lower upfront cost — freeing budget for CPUs, RAM, and storage.
Fully Tested & Verified
Every unit undergoes comprehensive hardware diagnostics before dispatch. POST tests, burn-in, memory checks, and power supply verification are standard.
Immediate Availability
Unlike new enterprise servers with lead times of weeks or months, refurbished stock is ready to ship within 24 hours of ordering.
Same Performance
The hardware inside the R650xs performs identically whether purchased new or refurbished. The 3rd Gen Xeon platform, PCIe Gen4, and iDRAC9 are unchanged.