The Cisco IP Phone 7821 (CP-7821-K9) is a cost-effective, 2-line wideband VoIP business phone built for information workers, managers and high-volume call environments. Part of the Cisco 7800 Series, it combines an ergonomic design with crystal-clear HD audio (G.722 wideband codec) and proven enterprise reliability.
Key features
- 2 programmable line keys with tri-color LED status indicators
- 3.5-inch 396 x 162 pixel monochrome backlit display with high-resolution grayscale graphics
- 4 context-sensitive softkeys and dedicated fixed-function keys (conference, hold, transfer, messaging, directory)
- Full-duplex speakerphone with wideband audio
- Integrated 10/100 Mbps 2-port Ethernet switch (RJ-45) - connect the phone and a PC through a single network drop
- PoE Class 1 powered (or use the optional CP-PWR-ADPT-3 power adapter when PoE is not available)
- Wall-mountable with optional wall-mount kit
- Cisco Unified Communications Manager (CUCM) compatible with the standard Basic User Connect License (UCL)
Ideal use cases
The Cisco 7821 sits in the middle of the 7800 Series, between the entry-level 7811 (single line) and the more advanced 7841 (4 lines) / 7861 (16 lines). It is the right choice when you need:
- Reliable two-line voice for office workers
- A budget-friendly upgrade from older 7900 or SPA series phones
- Standardized hardware across a Cisco CUCM deployment
- Refurbished hardware to extend the life of existing infrastructure cost-effectively
What is in the box (new units)
Cisco IP Phone 7821 base unit, handset, handset cord, Ethernet cable, foot stand, user guide.
Compatibility
Works with Cisco Unified Communications Manager (on-premises or cloud-hosted) and most third-party SIP-based call control platforms via the 3PCC firmware variant (CP-7821-3PCC-K9, sold separately).
Power options
The 7821 is powered via Power-over-Ethernet (PoE Class 1) by default. For deployments without PoE, the Cisco IP Phone Power Adapter 3 (CP-PWR-ADPT-3-NA / -EU / -UK depending on region) is sold separately.
Why buy from Networkser
All our Cisco IP Phones are tested, factory-reset and verified working before shipment. We carry a wide range of grades - from new sealed units to budget-friendly USED condition - so you can match cost to your project needs. EU warehouse, fast shipping across the Netherlands and Europe, and dedicated B2B support.