| Product Type | VoIP phone |
| Model Number | CP-7821-K9++= |
| Display Type | LCD display - monochrome |
| Display Size | 3.5" |
| Display Resolution | 396 x 162 pixels |
| Display Backlight | Yes |
| Weight | 30.6 oz |
| Form Factor | Table-top / Wall-mounted |
| Body Material | PC/ABS |
| Power Requirements | PoE (IEEE 802.3af) |
| Firmware Upgradable | Yes |
| Speakerphone | Yes (digital duplex) |
| Lines Supported | 2 lines |
| Dialer Type | Keypad |
| Dialer Location | Base |
| Conference Call Capability | Yes |
| Programmable Buttons | 2 |
| Menu Operation | Yes |
| Indicators | Voice message waiting indicator, speakerphone indicator, headset |
| Additional Functions | Call timer |
| Additional Features | Music on hold |
| Display Languages | Multilingual (including English, Spanish, French, German, Chinese, Japanese, etc.) |
Cisco IP Phone 7821 TAA Compliant VoIP Phone

Key Benefits
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- Ideal for TAA-compliant environments such as government or regulated industries
- Seamless integration with Cisco network infrastructure and broad codec support enhances enterprise compatibility
- Built-in security and PoE support reduce deployment cost while maintaining compliance and performance
Product Overview
The Cisco IP Phone 7821 offers a two-line VoIP solution ideal for TAA-compliant business and government applications. Featuring advanced voice codecs like G.722 and G.729a, SIP protocol support, and secure encrypted communication, it integrates well with Cisco Unified Communications environments. The 3.5-inch LCD display with backlight offers intuitive interaction, while dual Ethernet ports, PoE support, and a headset jack ensure efficient connectivity. Additionally, the unit is wall-mountable or table-top ready and includes firmware upgradability for extended lifecycle management.
Specifications
Product Overview
Advanced Security Features
| Encryption Algorithms | 128-bit AES, 256-bit AES |
| Authentication | IEEE 802.1X |
| Transport Security | TLS |
| Secure Media Encryption | Secure RTP (SRTP) |
Physical & Environmental
| Width | 8.1 in |
| Depth | 1.1 in |
| Height | 8.1 in |
Interfaces
| Ethernet Ports | 2 x 10/100Base-T Ethernet |
| Headset Port | Yes |
| VoIP Protocols | SIP, SRTP |
| Voice Codecs | G.722, G.729a, G.711u, G.711a, iLBC |
| Integrated Ethernet Switch | Yes |
| Quality of Service (QoS) | IEEE 802.1Q VLAN, IEEE 802.1p |
| IP Address Assignment | DHCP, Static |
Cloud Management & Licensing
| Compatible Software | Cisco Unified Communications Manager 8.5.1 or later, Cisco Hosted Collaboration Solution, Cisco Unified Survivable Remote Site Telephony 8 or later |
| Supported Platforms | Cisco Business Edition 6000 |
Compliance & Origin
| TAA Compliant | Yes |
| Country of Origin | MEXICO / TAIWAN |
| Certifications & Standards | CISPR 22 Class B, CISPR 24, EN 61000-3-2, EN 61000-3-3, EN55024, EN55022 Class B, ICES-003 Class B, AS/ACIF S004, FCC Part 68, EMC, CS-03, UL 60950-1 Second Edition, EN 60601-1-2, FCC CFR47 Part 15 B, GB 4943, AS/NZS 60950, CSA C22.2 No. 60950-1 Second Edition, EN 60950-1 Second Edition, IEC 60950-1 Second Edition, VCCI Class B, KN24, KCC KN22 Class B, AS/ACIF S040 |
| Warranty | 1 year limited replacement |