| Model Number | CP-9951-C-CAMK9-WS |
| Display | 5-inch (800×480) widescreen VGA color display with touchscreen |
| Camera | 2-megapixel fixed-focus camera for video calling and video conferencing |
| Speakerphone | Full-duplex speakerphone with acoustic echo cancellation and background noise suppression |
| Audio Codecs | G.711a, G.711u, G.729a, G.729ab, G.722, and iLBC |
| Network Connectivity | 10/100/1000BASE-T Ethernet with PoE support and 802.11a/b/g/n Wi-Fi for wireless connectivity |
| Power Supply | Power over Ethernet (PoE) or optional AC power adapter |
| Call Control Protocol | Session Initiation Protocol (SIP) and Skinny Client Control Protocol (SCCP) |
| Encryption Support | Advanced Encryption Standard (AES) and Secure Real-Time Transport Protocol (SRTP) for secure communications |
| Directory Support | Local directory, server directory, and call history with up to 1000 entries |
| Expansion Module | Support for Cisco Unified IP Phone Expansion Module 8800 Series for increased scalability and productivity |
| Headset Support | RJ-9 headset port with wideband audio support and compatibility with various wired and wireless headsets |
| Dimensions | 8.66 x 9.84 x 1.57 inches (220 x 250 x 40 mm) |
| Weight | 3.5 lbs (1.6 kg) |
| Operating Temperature | 32 to 104°F (0 to 40°C) |
| Storage Temperature | -22 to 140°F (-30 to 60°C) |
| Humidity | 10 to 95% non-condensing |
| Operating System | Cisco Unified Communications Manager (UCM), Cisco Hosted Collaboration Solution (HCS), or third-party call control system |
| Language Support | English, French, Spanish, German, Italian, Portuguese, Russian, Norwegian, Dutch, Danish, Swedish, and more |
| Warranty | One-year limited hardware warranty |
| Compliance | FCC, CE, UL, and RoHS |
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