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Plain Old Telephone Service

Also called the public switched telephone network (PSTN). Basically it's the old (current) telephone system but to show how dazzlingly brilliant the new system is they had to give the old (current) one a crappy name. No doubt the VoIP infrastructure will be given a suitable crappy acronym once it's replacement is thought up, suggestions on a postcard please to VOIPS (Very Old Internet Phone Service)


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