DIY faraday options in case that whole "sat phones for senators" thing = EMP incoming
(urbansurvivalsite.com)
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The satellite phones utilize networks to connect the satellite link site to the phone network. Of the internet goes down, only the old school hardlines will work and even then, only some will still work. Most of the hardline infrastructure has not been maintained because of a lack of subscribers. Most of the companies are using VOIP systems for all their phone lines within their buildings. Most government buildings and military bases are using networked phone systems, as well. I am not sure who they will be calling if the internet goes down.
I seem to recall pre-internet sat phones. Am I wrong in that memory? Not being snarky in the question. I'm not a tech guy so not sure.
The old analog systems used the hard lines for connecting between nodes. The uplink/downlink site connected to hard lines to route calls to regular users. The hardlines are not used as much as they once were. They are still available in some older buildings and sites, but mostly have been upgraded to VOIP phones and connected via ethernet vice the older RJ11 connections that we used to see. Most everything now has upgraded to RJ45 connectors and ethernet switches/routers.
Thanks.