Glossary of Terms

 

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The telecommunications and fiber industries are full of terms and acronyms. Our glossary of terms attempts to capture some of them.

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q

QAM: See Quadrature Amplitude Modulation.

QOS: See Quality of Service.

Quadrature Amplitude Modulation (QAM): A system of modulation in which data is transferred by modulating the amplitude of two separate carrier waves, mostly sinusoidal, which are out of phase by 90 degrees (sine and cosine). Due to their phase difference, they are called quadrature carriers. Used extensively in cable systems.

Quadruple Play: A triple play with cell phone service.

Quality of Service (QOS): The ability to provide different priority to different applications, users or data flows, or to guarantee a certain level of performance to a data flow in a broadband network.


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