Cisco 6851 IP Phone – 4-Line VoIP Desk Phone with PoE, SIP, 3.5″ LCD – Charcoal (CP-6851-K9)

✅ Key Features

• Model: Cisco CP-6851-K9 – Reliable and affordable IP phone with essential enterprise features
• Phone Type: Corded VoIP IP phone designed for business-class voice communications
• Lines Supported: 4 programmable line keys with LED indicators for multi-line use
• Display: 3.5-inch backlit grayscale LCD for clear menu navigation and call information
• Connectivity: Dual 10/100/1000BASE-T Gigabit Ethernet ports with Power over Ethernet (PoE) support
• PoE Class: Class 2 PoE compliance for energy-efficient operation
• Audio Quality: Wideband audio and full-duplex speakerphone for superior voice clarity
• Handset: Ergonomic handset with hearing aid compatibility and HD audio
• Security: Secure signaling protocols, encrypted configuration files, and device authentication
• User Interface: Intuitive interface with soft keys and navigation cluster for simplified control
• Call Handling: Supports hold, transfer, conference, voicemail access, and call history
• Mounting Options: Includes support for both desktop and wall-mount deployments
• Power Options: Operates via PoE or optional external AC adapter (sold separately)
• Firmware Compatibility: Works with Cisco Unified Communications Manager and third-party SIP platforms
• Use Case: Best suited for small to mid-sized businesses and branch offices
• Condition: Brand new and factory-sealed for professional deployments

📦 Description

The Cisco CP-6851-K9 is a cost-effective, full-featured VoIP IP phone designed for businesses that require reliable voice communications and essential call features. With 4 programmable line keys, this phone provides flexibility for handling multiple calls, making it ideal for small to medium-sized businesses and branch offices.

Its 3.5-inch backlit grayscale LCD delivers excellent readability in any lighting condition, providing clear information on caller ID, call status, and menu options. The dual Gigabit Ethernet ports support seamless data and voice connectivity while enabling pass-through to a connected PC, and PoE Class 2 compliance ensures efficient power usage.

The CP-6851-K9 delivers wideband audio performance, paired with a full-duplex speakerphone, for professional-grade sound whether using the handset, speaker, or a headset. The phone also includes secure signaling and encrypted configurations, ensuring voice traffic and system settings are protected from unauthorized access.

Designed for ease of use and versatility, this phone includes fixed function keys, soft keys, and navigation buttons to quickly access voicemail, settings, and call control features. It supports both desktop placement and wall mounting, giving IT teams the flexibility to deploy in various workspace configurations.

Built for long-term performance and seamless integration with Cisco and SIP-based call control platforms, the Cisco CP-6851-K9 is an ideal choice for organizations seeking enterprise-quality telephony at an affordable price point.

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