Cisco CP-8851-K9 IP phone / endpoint
Brand: Cisco | Category: Accessories & Components
SKU: CSC-CP-8851-K9 | Part #: CP-8851-K9 | MPN: CP-8851-K9
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About the Cisco CP-8851-K9 IP phone / endpoint
The Cisco CP-8851-K9 IP phone delivers enterprise-grade voice communications with a 5-inch WVGA backlit color LCD display (800 × 480 pixels) and dual integrated Gigabit Ethernet switching, enabling seamless desk phone deployment across unified communications environments. Built for network engineers and IT procurement teams managing Cisco voice infrastructure, this endpoint combines wideband audio codecs—including G.722 HD voice, G.711a, G.711u, G.729a, and iLBC—with full-duplex wideband speakerphone capability to ensure crystal-clear conversations in modern office settings.
The CP-8851-K9 offers flexible connectivity through 5 programmable line keys, 5 programmable feature keys, and multiple headset options: RJ-9 analog, USB Type-A, and integrated Bluetooth for wireless headsets and mobile device pairing. A dual Gigabit Ethernet switch (SW and PC ports) with 10/100/1000BASE-T support enables desktop PC passthrough connectivity, while IEEE 802.3af Power over Ethernet eliminates dedicated power lines—with optional external Cisco power adapter support for alternative deployments. Security is built-in via TLS signaling encryption, SRTP media encryption, and 802.1X authentication. The phone runs SIP signaling and integrates directly with Cisco Unified Communications Manager (UCM) and Cisco Webex Calling platforms. The included adjustable tilt footstand supports both desktop and wall-mounted installations, with the phone finished in Charcoal Dark Gray.
Deployment Scenarios
- Executive and management desk phones within Cisco Unified Communications Manager environments
- High-security office facilities requiring 802.1X authentication and encrypted signaling
- Hybrid work setups leveraging Bluetooth pairing to personal mobile devices
- Space-constrained offices using wall-mount configurations with passthrough PC connectivity
- Wideband HD voice requirements in customer-facing departments and contact centers
For detailed specifications, availability, and licensing details on the CP-8851-K9, contact Omnixon Global to submit your RFQ.
Technical Specifications
| Brand | Cisco |
| Category | Accessories & Components |
| SKU | CSC-CP-8851-K9 |
| Part Number | CP-8851-K9 |
| Condition | New |
| Interface | 802.3af PoE |
| Manufacturer Part Number | CP-8851-K9 |
| Display | 5-inch WVGA backlit color LCD, 800 × 480 pixels |
| Line Keys | 5 programmable line keys |
| Programmable Feature Keys | 5 |
| Audio Codec Support | G.711a, G.711u, G.722 (wideband HD), G.729a, iLBC |
| Speakerphone | Full-duplex wideband speakerphone |
| Headset Interface | RJ-9 analog headset port; USB headset support; Bluetooth |
| Bluetooth | Integrated Bluetooth for wireless headsets and mobile device pairing |
| USB Port | 1 × USB Type-A (headset support and device charging) |
| Network Interface | Dual integrated Gigabit Ethernet (10/100/1000) switch – SW and PC ports |
| PC Port (Passthrough) | 1 × 10/100/1000BASE-T (desktop PC passthrough) |
| Power over Ethernet | IEEE 802.3af PoE |
| External Power | Optional Cisco power adapter (sold separately) |
| Signaling Protocol | SIP |
| Call Control Compatibility | Cisco Unified Communications Manager (UCM); Cisco Webex Calling |
| Security | TLS signaling encryption; SRTP media encryption; 802.1X authentication support |
| Wall Mount | Supported (optional wall mount kit) |
| Footstand | Adjustable tilt footstand included |
| Color | Charcoal Dark Gray |
| Operating Temperature | 0°C to 40°C (32°F to 104°F) |
| Regulatory Compliance | CE; FCC Part 15 Class B; UL |
Frequently Asked Questions about Cisco CP-8851-K9 IP phone / endpoint
What does the Cisco CP-8851-K9 IP phone / endpoint do?
The Cisco CP-8851-K9 IP phone / endpoint is enterprise IT hardware deployed in production data centers, server rooms, and edge sites across the GCC and EMEA region.