Cisco Desk Phone 9851 IP Phone DP-9851-K9 6-Line Color LCD Gigabit PoE

Save on the Cisco Desk Phone 9851 (DP-9851-K9=) — a modern 6-line IP phone built for enterprise, hybrid, and cloud calling environments. Backed by Reef Telecom's industry-leading 10-year warranty, this new Cisco 9800 Series phone delivers exceptional value with AI-enhanced audio, government-grade security, and multi-platform flexibility out of the box.

Key Features & Specifications

• Display: 3.7-inch Color LCD, 480 x 240 resolution, backlit
• Line Keys: 6 physical line keys, up to 46 programmable keys
• SIP Support: Up to 16 SIP lines — compatible with Webex Calling and Open SIP platforms
• Multi-Platform PhoneOS: One device for CUCM, Webex Calling, BroadWorks, and 3rd-party cloud calling (3PCC)
• AI-Powered Audio: Cisco Smart Audio with AI noise removal and full-duplex speakerphone
• Security: Government-grade — TPM 2.0, TLS 1.3, Secure Boot, SRTP encryption
• Connectivity: Dual Gigabit Ethernet (10/100/1000), USB-A port, USB-C port, PoE supported
• Codecs: OPUS, G.722/G.722.2, iSAC, G.711, G.729a/b, iLBC
• Hot Desking & Desk Reservation: Built-in sign-in/authentication support
• Hearing Aid Compatible (HAC)
• Expandable: Supports Cisco 9800 Series Key Expansion Module (KEM)
• Sustainability: ENERGY STAR certified, 74% post-consumer recycled plastic

Compatibility & Use Cases

The Cisco 9851 is ideal for offices, home offices, and hybrid work deployments. It works seamlessly with Cisco Unified Communications Manager (CUCM 12.5+), Webex Calling, BroadWorks, and a wide range of open-source PBX systems and hosted cloud solutions including RingCentral, Nextiva, Vonage Business, and 8x8. Power adapter sold separately — PoE recommended for streamlined installation.

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