Cisco CP-6851-3PCC-K9-RF 6851 IP Phone - Refurbished - Charcoal - 4 SIP Lines - 2 PoE Ports - VoIP
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Product Features
Technical Overview
This IP phone operates on VoIP technology, converting audio signals into digital packets for transmission over IP networks. It features two RJ-45 network ports: one for connecting to the LAN and a second pass-through port for daisy-chaining another device, such as a computer, without requiring an additional switch drop.
The 6851 includes a full-duplex speakerphone for hands-free conversations and supports caller ID to display incoming call information. Its four-line capacity allows users to manage multiple calls or extensions directly from the handset, supporting typical small to medium business telephony needs.
This section brings together practical product details such as IP Phone Technology, Total Number of Phone Lines, Caller ID, Network (RJ-45), so buyers can judge configuration, deployment fit, and day-to-day suitability with less guesswork.
A strong technical summary explains how the product's interfaces, hardware profile, and operating characteristics work together in real deployment. Buyers often need this context to confirm compatibility with existing devices, expected performance in daily use, and whether installation will be straightforward for IT staff or end users.
Key Product Advantages
The Cisco 6851 combines practical telephony features with deployment flexibility. Its PoE support eliminates the need for a separate power adapter, streamlining cable management and enabling installation in locations without convenient power access, such as conference rooms or wall-mounted setups.
Cost-Effective Communication
By leveraging VoIP technology, this phone routes calls over internet connections, potentially reducing long-distance and toll charges compared to traditional PSTN lines while maintaining voice clarity.
- Uses existing network infrastructure
- Avoids per-minute toll fees
- Integrates with IP PBX systems
Desk-Ready Design
The Charcoal finish offers a professional appearance that blends with office decor. Its compact footprint and lightweight construction make it easy to position on desks without occupying excessive space.
- Sleek charcoal color
- Lightweight at 1.36 lb
- 10.4-inch width fits standard desks
Deployment / Use Cases
This refurbished Cisco 6851 is ideal for businesses seeking reliable, feature-rich telephony without the cost of new hardware. Its four-line capacity suits roles that handle multiple calls, such as receptionists, managers, or support staff who need quick access to different lines or extensions.
The PoE capability makes it particularly useful in retrofit installations or spaces where adding electrical outlets is impractical. Common deployment scenarios include office lobbies, conference halls, hotel guest rooms, and shared workspaces where centralized phone service with basic advanced features is required.
Small Office Reception
Deploy at front desks to manage incoming calls across multiple lines while maintaining a professional appearance with hands-free speakerphone capability.
Conference Room Setup
Install in meeting rooms using PoE for clean cable runs, providing teleconferencing support with caller ID to identify incoming participants.
Physical Profile
The phone measures 10.40 inches wide by 8.20 inches high by 1.30 inches deep, with a weight of approximately 1.36 pounds. Its slim depth and moderate footprint allow it to sit comfortably on most desks without obstructing workspace. The Charcoal finish provides a neutral, professional look that integrates well with standard office equipment.
The physical profile is practical for deployment planning because the dimensions and weight are clearly defined: 8.20" (208.28 mm), 10.40" (264.16 mm), 1.30" (33.02 mm), 1.36 lb (615 g). This helps confirm rack, shelf, desk, or cabinet fit before installation.
- Width
- 10.40" (264.16 mm)
- Depth
- 1.30" (33.02 mm)
- Height
- 8.20" (208.28 mm)
- Weight
- 1.36 lb (615 g)
Highlights
- Four SIP lines for handling multiple calls or extensions
- Power over Ethernet (PoE) support for single-cable data and power
- Two RJ-45 network ports with pass-through connectivity
- Integrated speakerphone for hands-free conversations
- Caller ID display for incoming call identification
- Charcoal finish for professional office aesthetics
- Energy Star certified for reduced power consumption
- Refurbished condition offering cost savings over new
Specifications
| Specifications | |
|---|---|
| Manufacturer | Cisco Systems, Inc |
| Manufacturer Part Number | CP-6851-3PCC-K9-RF |
| Brand Name | Cisco |
| Product Series | 6800 |
| Product Model | 6851 |
| Product Name | IP Phone 6851 |
| Product Condition | Refurbished |
| Product Type | IP Phone |
| Technical Information | |
| IP Phone Technology | VoIP |
| Total Number of Phone Lines | 4 |
| Caller ID | Yes |
| Speakerphone | Yes |
| Interfaces/Ports | |
| Network (RJ-45) | Yes |
| Number of Network (RJ-45) Ports | 2 |
| PoE (RJ-45) Port | Yes |
| Physical Characteristics | |
| Product Color | Charcoal |
| Height | 8.20" (208.28 mm) |
| Width | 10.40" (264.16 mm) |
| Depth | 1.30" (33.02 mm) |
| Weight (Approximate) | 1.36 lb (615 g) |
| Miscellaneous | |
| Energy Star | Yes |
FAQ
How many simultaneous calls can this Cisco 6851 IP Phone handle?
The Cisco 6851 supports four SIP lines, meaning it can manage up to four concurrent calls or line appearances. This allows users to handle multiple incoming or outgoing calls, put calls on hold, or switch between lines without dropping connections, making it suitable for busy desks or shared environments.
Does this phone require a separate power adapter?
No, the Cisco 6851 includes a Power over Ethernet (PoE) port, so it can receive both data and electrical power over a single network cable when connected to a PoE-enabled switch or injector. This eliminates the need for a separate power adapter, simplifying installation and reducing cable clutter.
What are the network port configurations on this IP phone?
This phone has two RJ-45 network ports. One port connects to your LAN for VoIP service, and the second is a pass-through port that allows you to daisy-chain another device, such as a computer, using the same network drop. This setup conserves switch ports and reduces cable runs to the desk.
Is the speakerphone full-duplex?
Yes, the Cisco 6851 features a full-duplex speakerphone, enabling natural, simultaneous two-way conversation without cut-off or echo. This allows for hands-free communication in office settings, conference calls, or when multitasking during calls.
What color is this Cisco 6851 model?
This refurbished Cisco 6851 IP Phone comes in a Charcoal finish. This neutral, dark gray color provides a professional appearance that blends well with most office decor and equipment, maintaining a cohesive look across workstations.
Does this phone support caller ID?
Yes, the Cisco 6851 supports caller ID functionality, displaying the phone number and optionally the name of incoming callers on its screen. This helps users identify callers before answering, improving efficiency and allowing better call management in business environments.
How many SIP lines or accounts does this phone support?
The listed telephony detail is 4, which helps buyers confirm deployment fit for desk-phone and unified-communications environments.
Does this model support PoE?
The listed telephony detail is Yes, which helps buyers confirm deployment fit for desk-phone and unified-communications environments.
| Qty | Price | Available |
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