Polycom RMX 1500/2000/4000 Administrator’s Guide
Abbreviation/ | Explanation | |
Term | ||
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DTMF | Dual Tone Multi Frequency. A system of coded signals | |
| used by | |
| frequency or tone is assigned to each key so that the | |
| signal can be easily recognized by a computer. The codes | |
| enable data input and control of | |
| systems. DTMF signals can pass through the entire | |
| connection to the destination device and therefore are | |
| used for remote control after the connection with the MCU | |
| is established. | |
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E1 Line | A 2Mb digital switched line used in Europe. | |
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Endpoint | A hardware device, or set of devices, that can call, and be | |
| called by an MCU or another endpoint. For example, an | |
| endpoint can be a phone, a camera and microphone | |
| connected to a PC or an integrated Room System | |
| (conferencing system). | |
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FECC | Far End Camera Control. In certain video cameras, the | |
| accompanying software that enables a participant to | |
| control a remote camera. Used in Continuous Presence | |
| video conferences in conjunction with the LSD option. For | |
| more information, see LSD. | |
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Frame | A group of bits that make up an elementary block of video | |
| data for transmission by certain protocols. | |
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Frame Rate | The number of video frames displayed | |
| one second, measured in fps (frames per second). | |
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G.711 | ||
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G.722 | ||
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G.728 | ||
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Gatekeeper | A type of server that performs two main functions: | |
| translates LAN alias addresses of terminals and gateways | |
| to IP addresses and provides bandwidth management. | |
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H.221 | ||
| control, and user data into one serial bit stream. | |
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