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What is an E&M line? What is the difference between a 2 wire and 4 wire E&M?

What is an E&M line? What is the difference between a 2 wire and 4 wire E&M?

What is an E&M line? What is the difference between a 2 wire and 4 wire E&M?

The difference between 2 and 4 wire systems will be the speed and type of communication. They will either use 2 or 4 pair to transmit and receive. These signals can also be converted to fiber for extended distances, increasing availability to those that are not within the shorter distances needed for some carrier services.

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