I find I agree. - lossy vs lossless codecs (PSTN isn't analogue end-to-end any more, but is lossless as far as I'm aware. VoIP seems to have been about squee

I find I agree. - lossy vs lossless codecs (PSTN isn't analogue end-to-end any more, but is lossless as far as I'm aware. VoIP seems to have been about squeezing as much traffic down the pipe as possible, at the expense of quality.) - circuit vs packet switched networks (Congestion, contention, jitter on shared packet switched networks. While I'm sure PSTN doesn't have "physical" circuit switching any more, I do get the impression that high-bandwidth bearers are chopped into fixed-width chunks, like 64k ISDN, and will reach capacity and stop accepting demand rather than degrade individual connections) For me, wideband audio helps, even with the jitter and lossy codec. This is starting to become common in the UK on cellular calls between smartphones, even between different network providers. Audio bandwidth is comparable to Facetime Audio.