| Product Name | Cisco Unified IP Phone CP-7811-K9= |
| Display | 3.28-inch (83mm) 384×106 pixel-based |
| Speakerphone | Full-duplex |
| Ethernet Switch | 10/100 |
| Protocol Support | SIP |
| Power | IEEE Power over Ethernet (PoE) or Cisco Power Cube 3 (Sold Separately) |
| Headset Port | RJ-9 |
| Audio Codecs | G.711a, G.711u, G.729a, G.729ab, iLBC |
| Security | 802.1X authentication and encryption of signaling and media |
| Dialing | Keypad dialing, on-hook dialing, redial, call waiting, and transfer |
| Volume Control | Volume-control toggle for handset, headset, and speakerphone |
| Display Contrast | Adjustable |
| Call History | Lists dialed, received, and missed calls |
| Directories | Local phonebook with up to 100 entries and corporate directory |
| Language Support | English, Arabic, Bulgarian, Catalan, Chinese, Croatian, Czech, Danish, Dutch, Finnish, French, German, Greek, Hebrew, Hungarian, Italian, Japanese, Korean, Norwegian, Polish, Portuguese, Romanian, Russian, Spanish, Slovak, Swedish, and Turkish |
| PoE Class | Class 1 |
| Dimensions | 8.4 x 7.5 x 6.2 inches |
| Weight | 1.7 pounds |
| Warranty | 1-year limited hardware warranty with return to factory replacement |
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