Cisco IP Phone 7821

The Cisco IP Phone 7821 is part of the Cisco 7800 Series, designed to deliver affordable and reliable VoIP communications for business-class voice needs. Ideal for small to medium-sized businesses, branch offices, and common areas, the 7821 supports two SIP lines and offers wideband audio for superior voice clarity.

With a 3.5-inch backlit grayscale display, intuitive navigation, and fixed function keys for common tasks (such as voicemail, transfer, hold, and conference), the phone delivers a user-friendly experience. It supports Power over Ethernet (PoE) for easy installation, and Cisco’s Intelligent Proximity feature for mobile integration, enabling users to pair smartphones for contact syncing and call handling.

Key features include:

• Two SIP lines with support for multiple call appearances

• High-quality wideband audio with a full-duplex speakerphone

• 3.5-inch 384×106 pixel display with white backlight for readability

• Fixed keys for voicemail, directory, settings, volume, mute, headset, and speakerphone

• PoE Class 1 support, with optional external power adapter

• Secure communication protocols including SRTP and 802.1X

• Support for Cisco Unified Communications Manager (CUCM), CME, and third-party SIP platforms

The Cisco IP Phone 7821 strikes the perfect balance between functionality and affordability, making it a practical choice for users who need reliable voice communications without advanced multimedia features.