Overview of Cisco IP Phone 8851 with Multi-Platform Firmware and Power Cube 4 (CP-8851-3PW-NA-K9) | New

The Cisco IP Phone 8851 with Multi-Platform Firmware and Power Cube 4 (CP-8851-3PW-NA-K9) is designed for SIP-based cloud and on-premises services like BroadSoft, Cisco Webex Calling, Asterisk-based systems and numerous other hosted PBXs that adhere to standards. Even in high-volume settings, call management is simple because to the 5-inch 800x480 pixel color screen's clear interface for line appearances, phonebook entries, call history and feature prompts. To reduce training and mistakes, five programmable line keys allow multiple SIP accounts or BLF/speed dials and context-sensitive soft keys adjust to each call state—dialing, ringing, active or transfer. While integrated headset connectors and wideband audio guarantee high-quality conversations via wired or EHS headsets, dual gigabit Ethernet connections enable the phone and a connected PC to share one network drop without compromising bandwidth. This bundle is especially helpful for home offices, small offices and network segments without PoE-capable switches because the accompanying Power Cube 4 provides local AC power. Many ITSPs and cloud PBX providers employ flexible provisioning techniques like HTTPS auto-provisioning or TR-069, which are made possible by Multi-Platform Firmware (MPP), which eliminates Cisco UC Manager dependencies. This translates to a business-class Cisco endpoint that IT teams can use in a variety of SIP contexts while maintaining well-known Cisco hardware quality and security capabilities like TLS/SRTP.

Key Features of Cisco IP Phone 8851 with Multi-Platform Firmware

• 5‑inch color display with high‑resolution 800×480 pixel screen with intuitive icon‑driven menus, soft keys and clear line status for simplified call handling.
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• Five programmable line keys that support for multiple SIP accounts, shared line appearances, busy‑lamp fields or speed dials on a single device

• Multi‑Platform Firmware (MPP) with SIP‑optimized firmware designed for interoperability with a wide range of cloud PBX and hosted VoIP platforms (not locked to Cisco Unified CM).
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• Wideband audio support with G.722‑class wideband codec and tuned acoustics on both handset and speakerphone for natural‑sounding voice quality.

• Full‑duplex speakerphone with hands‑free operation with echo cancellation, ideal for impromptu conference calls at the desktop.

• Dual Gigabit Ethernet ports with 10/100/1000 Mbps LAN and PC ports with QoS support, allowing phone and computer to share a single network drop.

• Headset‑friendly design with dedicated RJ‑9 headset port and support for electronic hook switch (EHS) adapters on supported headsets for remote answer/end.
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• Built‑in USB port (on many 8851 MPP variants) for charging mobile devices or connecting supported accessories, depending on firmware and region.
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• Power Cube 4 included with AC power adapter and region‑specific power cord for deployments without PoE.
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• Secure signaling and media with typical support for TLS and SRTP on MPP firmware for encrypted signaling and voice streams when enabled on the platform.
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Benefits of Cisco IP Phone 8851 with Multi-Platform Firmware

Specifications for Cisco IP Phone 8851 with Multi-Platform Firmware and Power Cube 4 (CP-8851-3PW-NA-K9) | New