The Cisco IP Phone 7811 and 7821 require a Basic User Connect License (UCL) in order to connect to Cisco Unified Communications Manager. The Cisco IP Phone 7841 and 7861 require an Enhanced User Connect License (UCL) in order to connect to Cisco Unified Communications Manager.
Configuration options
Directories | The phone identifies incoming messages and categorizes them for users on the screen. This makes it fast and easy to return calls using direct dial-back capability. The corporate directory integrates with the Lightweight Directory Access Protocol (LDAP) standard directory. |
Weight | 868g |
Display | 3.5” 396×162 pixels |
Phone casing composition | Polycarbonate Acrylonitrile Butadiene Styrene (ABS) textured plastic. |
Operational temperature | 32 to 104°F (0 to 40°C) |
Nonoperational temperature shock | 14 to 140°F (-10 to 60°C) |
Humidity | Operating 10% to 90%, non-condensing |
Multiple ring tones | The phone supports user-adjustable ring tones. |
Codec support | G.711a/ μ, G.722, G.729a/b, iLBC, OPUS |