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Of course ancient telephone wiring can carry 1 Gbps. The real question you always, always, always, need to be asking yourself is: Over what distance? Make tha
by quink 2y ago
Of course ancient telephone wiring can carry 1 Gbps. The real question you always, always, always, need to be asking yourself is:
Over what distance?
Make that distance short enough, as has happened with FTTN, or FTTC deployments in a whole heap of places, you're basically building a network that's, and I'll keep this very brief, subpar.
Since you mentioned a UK context there, Openreach rolled out an upgrade that kept the last mile of copper but now just about a decade later they're rolling out Full fibre. Whatever argument copper had, it went out the window near enough a decade ago.
- quink 2y agoOK, had a look through the linked paper. The big graphs, on page 8, tell you that if you decrease the twist length - which would entail relaying all the copper in the entire network, at which point you may as well put down fibre instead - you will get -20 dB at 10 GHz over a distance of 0.5m, 50cm, less than two feet, instead of -25 dB in the worst case. In other words, instead of losing 99.7% of the signal over that distance, it'll only lose 99% of the signal. Sure, it helps, but consider me underwhelmed.
- quink 2y agoPower, not signal, sigh.