- #1
quantumlight
- 23
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I am writing my senior thesis on communication networks and this question sort of popped into my head:
What determines what frequencies you can use in a landline connection? (e.g. say I have a wire connecting point A to B to send a bunch of signals, what prevents me from using the entire bandwidth from 1 hz to 1 ghz and beyond?)
In wireless networks I guess some frequencies have lower attenuation over long distances than others due to the composition of atmosphere or objects in between points A & B that absorb. different frequencies. Also you don't want two people to have their cellphones use the exact same carrier in the same zone or you won't be able to separate it out at the receiver.
However how do these limitations apply if you have a landline, you couldn't possibly be interfering with other landlines...? and how does the attenuation vary depending on whether the wire is copper, zinc etc. on frequency?
If I don't care about equipment complexity, what limits me from using my phone line to transmit at ridiculous data speeds for everything from internet to voice because I can use all the bandwidth possible?
Thanks
What determines what frequencies you can use in a landline connection? (e.g. say I have a wire connecting point A to B to send a bunch of signals, what prevents me from using the entire bandwidth from 1 hz to 1 ghz and beyond?)
In wireless networks I guess some frequencies have lower attenuation over long distances than others due to the composition of atmosphere or objects in between points A & B that absorb. different frequencies. Also you don't want two people to have their cellphones use the exact same carrier in the same zone or you won't be able to separate it out at the receiver.
However how do these limitations apply if you have a landline, you couldn't possibly be interfering with other landlines...? and how does the attenuation vary depending on whether the wire is copper, zinc etc. on frequency?
If I don't care about equipment complexity, what limits me from using my phone line to transmit at ridiculous data speeds for everything from internet to voice because I can use all the bandwidth possible?
Thanks