I have heard a lot of people saying that it is a really good thing to have incase of an emergency, but what does PSTN acually do.
I have heard a lot of people saying that it is a really good thing to have incase of an emergency, but what does PSTN acually do.
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Public Telephone Switched Network. PSTN is another term for plain old telephone service (POTS) I would think that it has something to do with routing voip calls over pots if dsl is down