Cisco CP-8811-K9 IP phone / endpoint
Brand: Cisco | Category: Accessories & Components
SKU: CSC-CP-8811-K9 | Part #: CP-8811-K9 | MPN: CP-8811-K9
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About the Cisco CP-8811-K9 IP phone / endpoint
The Cisco CP-8811-K9 IP phone is validated for deployment on Cisco Unified Communications Manager (UCM) and Cisco Webex Calling platforms, making it an ideal endpoint for enterprises standardized on either infrastructure. This IP desk phone from the Cisco IP Phone 8800 Series delivers essential telephony capabilities with a 3.5-inch grayscale LCD display featuring 384 x 106 pixel resolution, five programmable line and feature keys, and five soft keys for intuitive call management. The device supports SIP call signaling and offers wideband HD audio with G.711, G.722, and G.729a codec support, complemented by full-duplex wideband speakerphone functionality. Users can connect headsets via the RJ-9 headset port, while network connectivity is provided through a 10/100 Mbps Ethernet line interface and a dedicated PC passthrough port, both using RJ-45 connections. Power is delivered via Power over Ethernet (PoE) under IEEE 802.3af Class 1, though organizations may optionally deploy the Cisco CP-PWR-CUBE-4 power supply (sold separately) where needed.
Network engineers and IT procurement teams select the CP-8811-K9 because it combines reliable call handling with enterprise-grade security and quality of service controls. The endpoint implements TLS and SRTP encryption for both signaling and media, protecting voice communications across the network. IEEE 802.1p/Q VLAN tagging and DSCP support enable QoS prioritization, ensuring call quality in bandwidth-constrained environments. The device operates across standard office temperature ranges of 0°C to 40°C (32°F to 104°F), supporting diverse deployment scenarios from controlled data centers to varied office facilities. Part number CP-8811-K9 represents a proven workhorse for organizations seeking cost-effective, standards-compliant desk phones without unnecessary complexity.
Omnixon Global stocks the Cisco CP-8811-K9 and can support your endpoint procurement at scale. Contact our team to request a quotation for this device or to discuss integration with your existing Cisco communications infrastructure.
Technical Specifications
| Brand | Cisco |
| Category | Accessories & Components |
| SKU | CSC-CP-8811-K9 |
| Part Number | CP-8811-K9 |
| Condition | New |
| Interface | 802.3af PoE |
| Manufacturer Part Number | CP-8811-K9 |
| Product Series | Cisco IP Phone 8800 Series |
| Product Type | IP Desk Phone |
| Display | 3.5-inch grayscale LCD |
| Display Resolution | 384 x 106 pixels |
| Programmable Line / Feature Keys | 5 |
| Soft Keys | 5 |
| Call Signaling Protocol | SIP |
| Platform Compatibility | Cisco Unified Communications Manager (UCM), Cisco Webex Calling |
| Audio Standards | Wideband (HD) audio; G.711, G.722, G.729a codecs |
| Speakerphone | Full-duplex wideband speakerphone |
| Headset Interface | RJ-9 headset port |
| Network Interface (Line) | 10/100 Mbps Ethernet (RJ-45) |
| PC Passthrough Port | 10/100 Mbps Ethernet (RJ-45) |
| Power Input | Power over Ethernet (PoE) IEEE 802.3af Class 1 |
| Optional Power Supply | Cisco CP-PWR-CUBE-4 (sold separately) |
| QoS Support | IEEE 802.1p/Q VLAN tagging, DSCP |
| Security | TLS and SRTP encrypted signaling and media |
| Operating Temperature | 0°C to 40°C (32°F to 104°F) |
Frequently Asked Questions about Cisco CP-8811-K9 IP phone / endpoint
What does the Cisco CP-8811-K9 IP phone / endpoint do?
The Cisco CP-8811-K9 IP phone / endpoint is enterprise IT hardware deployed in production data centers, server rooms, and edge sites across the GCC and EMEA region.