Wattage:
is a unit of power measured in watts.
Wave length:
is the distance travelled by an electro magnetic wave during one cycle.
Wide angle lens:
is a type of lens which gives a wide view of the scene and has a magnification ratio of less than 1.
WAVELENGTH Distance between the same two points on adjacent waves, or the time necessary for a wave to complete a single cycle.
WDM Wavelength Division Multiplexing.
2 WIRE Transmission medium using the same two wires for transmit and receive channels. Either leased line or dial up.
4 WIRE Transmission system using 2 separate pairs of wire for the transmit and receive channels. Leased line or dial up can only be achieved on PSTN by dialling 2 separate numbers. |
