> Really? The last time I sent a fax was 2006. You're clearly missing the point here. T.38 and RFC-2833 largely exist because there's many, many voip routes th

> Really? The last time I sent a fax was 2006. You're clearly missing the point here. T.38 and RFC-2833 largely exist because there's many, many voip routes that can't transport low latency audio reliably. There's a lot of other things you can transport in a phone call that don't have out of band standards. If you require out of band standards to reliably transmit a fax or even something as basic as DTMF, you're clearly stifling what can be done within a perfectly valid form of transport. > Good luck trying to be that reliable with a population the size of the Internet, and if you can, good luck being able to pay and maintain an infrastructure of that size. Several companies have, and continue to do just that not just around the country, but around the world; end offices that serve customer lines are connected together by trunks to tandem switches. You clearly have no idea how the phone network works. > That's because circuit switching is literally setting up a wired connection between two points. It's not just one channel, though; techniques such as time or frequency division multiplexing allow you to stick thousands of calls over a cable or RF link.