Cisco IP Phone 7821 – CP-7821-K9 Charcoal, Black

The Cisco CP-7821-K9 IP Phone is a reliable two-line IP desk phone designed to meet the communication needs of businesses of all sizes. With wideband audio capabilities, intuitive usability, and robust integration into Cisco’s on-premises and hosted infrastructure or third-party call control platforms, the Cisco 7821 enhances daily communication efficiency with enterprise-grade functionality.

This phone delivers crystal-clear voice performance over the handset, headset, and full-duplex speakerphone, making it ideal for both desk workers and shared workspace environments. Its sleek charcoal finish, electronic hookswitch support, and energy-saving features like Cisco EnergyWise and PoE Class 1 compliance make it a practical and sustainable choice.

Product Features

Efficient 2-Line Communication
Supports two SIP lines, enabling users to manage multiple calls simultaneously with programmable line and feature keys.

Clear, Wideband Audio
Delivers superior audio quality across handset, headset, and speakerphone using G.722 wideband codec for lifelike voice clarity.

User-Friendly Design
Features an LCD display (384 × 106 pixels) and a familiar telephony interface with dedicated keys for conferencing, messaging, directory access, and a two-way navigation cluster.

Power-Efficient and Eco-Friendly
PoE Class 1 compliant and Cisco EnergyWise-enabled to reduce energy consumption and minimize operational costs.

Flexible Connectivity
Includes integrated 10/100 Ethernet switch with PC pass-through to minimize cabling and support co-located computing devices.

Versatile Mounting Options
Supports both desktop and wall-mount installations, making it suitable for offices, hallways, or shared spaces with limited desk area.

Secure Communications
Advanced security features such as 128-bit/256-bit AES encryption, SRTP, 802.1X, and TLS protect voice communications and device configuration.

Customizable Appearance
Comes with a replaceable bezel option, allowing for enhanced branding or visual customization.

Product Specifications

• Model: Cisco CP-7821-K9
• Color: Charcoal Black
• Lines Supported: 2 SIP lines
• Display: 384 × 106 pixel LCD display
• Audio Codecs: G.711a, G.711u, G.722 (wideband), G.729a, iLBC
• Speakerphone: Full-duplex with acoustic echo cancellation
• Headset Support: Electronic hookswitch (EHS) compatible
• Ethernet Ports: 2 × 10/100 Mbps RJ-45 ports
• PoE Support: Yes (Class 1 IEEE 802.3af compliant)
• Voice Features: Caller ID, Call Waiting, Hold, Transfer, Forwarding, Voicemail support
• Security Protocols: SRTP, TLS, 802.1X, AES-128/256
• Network Protocols: Cisco Discovery Protocol (CDP), DHCP, SRTP
• Mounting Options: Table-top and wall-mountable
• Construction: Black PC/ABS plastic housing
• Dimensions: 8.1” H × 8.1” W × 1.3” D
• Certifications: ADA, AS/ACIF, CISPR 22/24, EN 60950-1, EMC compliant
• Power Supply: Not included (requires PoE or optional external power adapter)