How do cable lines on telephone poles transmit and receive data along thousands of houses and not get interference?
In: Engineering
I’m not crazy about most of the responses. Telephone lines use a pair of wires. The signal is the difference between the pair. Because they are the same length, connected the same way, and right next to each other, they tend to receive the same interference–but, this doesn’t affect the difference between the pairs. Wire pairs are actually twisted to ensure that on average, each is the same distance from interferers , such as electric lines on the same pole.
Cable TV uses coaxial cables. That’s a different kettle of fish, but it’s also constructed to mitigate interference effects.
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