full duplex

A full-duplex system allows communication in both directions, and unlike half-duplex allows this to happen simultaneously. All wire telephone networks are full duplex as they allow both callers to speak and be heard at the same time.

Source: Wikipedia

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Tech note:
There are three different colour zones and two different light zones in this photo.

The word "zones" mean areas that have something in common which is different from the other parts of the photo. So there are three areas in which colour is used different than in the other two areas. And two areas in which light is different than in the other area.

About the image

More like it:: Darkroom
Where?:: See satellite view
More?:: See larger version on deviantART

Camera model:: Nikon E775
Shutter speed:: 10/1126 seconds
F Number:: F/10.0
Focal length:: 10 mm
ISO:: 100
Image finished:: 2006-11-01
Photo taken:: 2006-06-08 18:43:10

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