What are data multiplexers?

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For instance, I work for the government and in their IT closet I see these big racks that are carrying multiple fiber lines which terminate into this box that says:

Nokia 1665 DMX which is apparently something called a “data multiplexer.”

I did some research but I still don’t quite understand what they do. Are they for combining data, tv, and phone signals together from the ISP?

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Anonymous 0 Comments

A multiplexer is like a switch between different signals. Think for example about a home entertainment setup where you have one TV (with only one input) any many devices you want to connect to it (cable box, PS5, DVD player, etc). A multiplexer device (ex, a receiver) allows you to select an input source to feed the the TV.

I don’t know anything about the Nokia 1665 DMX specifically, but some quick searching suggests it’s like a fancy networking switch. It allows a person to connect a variety of different data interfaces to a high-speed fiber-optic network.

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