The Cisco 7821 IP Phone (CP-7821-K9) is a flexible and cost-effective VoIP solution for small to medium-sized organizations and knowledge workers. The Cisco 7821 IP Phone combines powerful functionality with a user-friendly interface, making it appropriate for companies with occasional to moderate call volume. It includes a 3.5-inch high-resolution greyscale display with white illumination, two programmable line keys, and a full-duplex speakerphone for crisp hands-free communication. The 7821 provides enhanced speech quality and seamless collaboration capabilities by supporting wideband audio and integrating with Cisco Unified Communications Manager. Key Features of Cisco 7821 IP Phone • 3.5-inch 396x162 pixel greyscale display with white backlighting • Two programmable line keys for flexible call management • Full-duplex wideband speakerphone for clear hands-free conversations • Dual 10/100 Ethernet ports with PC pass-through for efficient connectivity • Power over Ethernet (PoE) support (Class 1) for simplified installation • Advanced audio codecs including G.722, G.729ab, G.711, and iLBC • SIP and SRTP protocol support for secure VoIP communication • Integrated Ethernet switch for network optimization • Compatibility with Cisco Unified Communications Manager 8.5.1 or later • Support for Cisco Hosted Collaboration Solution • LDAP directory integration for easy contact management • Quality of Service features with 802.1Q/p support • Built-in security features including 802.1X authentication and file encryption • Adjustable stand for comfortable viewing angles • Optional wall-mount kit for versatile deployment