Cisco IP Phone 8851 (CP-8851-K9) — Enterprise-Grade VoIP for CUCM

Save up to 70% over new with this professionally refurbished Cisco 8851 IP Phone, backed by Reef Telecom's industry-leading 10-year warranty. The CP-8851-K9 delivers high-fidelity wideband audio, a vibrant 5-inch color display, and robust enterprise features — ideal for businesses expanding or upgrading their Cisco Unified Communications Manager (CUCM) deployment.

Key Specifications

• Display: 5-inch WVGA (800 x 480) backlit color display
• Lines: 5 programmable line/feature keys
• Audio: Full-duplex wideband speakerphone with HD voice
• Connectivity: Dual Gigabit Ethernet (10/100/1000) with PC passthrough
• Bluetooth: Built-in Bluetooth 3.0 EDR for wireless headsets
• USB: Side USB port for headsets or device charging
• Headset: RJ9 headset port + EHS-compatible AUX port
• PoE: IEEE 802.3af Class 3 (power adapter sold separately)
• Security: Secure boot, TLS, SRTP, encrypted voice communications
• Wall Mount: Optional with CP-8800-WMK= kit
• Expansion: Supports CP-BEKEM= and CP-8800-A-KEM= key expansion modules

Compatibility

This CP-8851-K9 firmware is designed exclusively for Cisco Unified Communications Manager (CUCM) version 8.6.2 and later, Cisco Business Edition 6000, and Cisco Hosted Collaboration Solution. Not compatible with third-party SIP platforms such as RingCentral, Vonage, or Zoom — for those platforms, see our Cisco 3PCC / MPP phones.

What's Included

• Cisco CP-8851-K9 IP Phone (refurbished to like-new condition)
• Standard handset with cord
• 10-year Reef Telecom warranty

Every Cisco 8851 is thoroughly inspected, tested, and cleaned before shipping. Upgrade your enterprise phone system with confidence — Reef Telecom has you covered.

Free ground shipping on orders over $300. Same-day shipping on orders placed before 4PM EST.

All products include our industry-leading 10 Year Warranty backed by Reef Telecom.