Glossary

The modulation of two separate signals onto carriers at a single frequency and kept separate by having the two signals 90 degrees out of phase.

Data prioritization at the Network layer of the OSI model. QoS results in guaranteed throughput rates.

An integrated circuit (IC) that measures received optical energy and interprets each voltage pulse as a binary 1 or 0.

Inaccuracies in analog to digital conversion caused by the inability of a digital value to match an analog value precisely. Quantizing error is reduced as the number of bits used in a digital sample increases, since more bits allow greater detail in expressing a value.

A basic unit, usually used in reference to energy. A quantum of light is called a photon.

The encoding method used by 100VG-AnyLAN, in which the 100Mbps signal is divided into four 25Mbps channels and then transmitted over different pairs of a cable. Category 3 cable transmits one channel on each of four pairs.