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What is the difference between simplex and duplex multiplexers?

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Question added by Abdullah Odibat , Software Developer (Java) , Capella Solutions
Date Posted: 2013/06/12
PIYUSH KUMAR
by PIYUSH KUMAR , Manager , FIDELITY INTERNATIONAL

A simplex multiplexer can only perform one of the multiplexing functions at a time.
When a simplex multiplexer is multiplex recording it displays cameras individually like a switch.
If a simplex multiplexer is being used to multiplex display the cameras are recorded just like they are displayed – all in one frame.
Simplex multiplexers are common in unmanned sites, where a multiple camera screen display is not required.
A duplex multiplexer performs both of these functions at the same time.
A duplex multiplexer has two multiplexing processors in the same unit.
It can display multiple cameras at the same time while multiplex recording those cameras.
There is usually not a large difference in price between simplex and duplex multiplexers, consequently duplex multiplexers are considerably more popular.

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