A poor understanding of telephony

Mr. Green clearly isn't familiar with telephony, or audio in general.

While it's true that humans can hear the 20-20,000 Hz (approximately) frequency range, in a traditional POTS to digital telephone system, the frequency cutoff is around 3000Hz, less than broadcast radio. This is the same claim he makes about IP telephony.

You're more likely to be hit by dropped packets and lose a "just kidding" comment after a joke than than miss nuances that would be transmitted by a traditional telephone.

Pants?

I don't understand the title, what does pants have to do with this? You guys drink too much!

Pure BS

Traditional POTS telephony is actually a 64kbps ITU G.711 digital signal that is bandwidth-limited to 4kHz (8kHz sampling rate), well below the 20kHz limits of teenage hearing.

Low bit-rate VoIP codecs like G.729 have less bandwidth than G.711, but other wideband codecs like Global IP Sound's ISAC used by Skype when the connection has enough bitrate to support it (almost always) sound far, far better than POTS. ISAC has a 16kHz sampling rate, thus it supports up to 8kHz audio bandwidth, twice as much as traditional telephony.

The fact VoIP phones are software upgradeable unlike dump phones, and can negotiate the best available codec based on what both sides support and how much IP bandwidth there is in-between means VoIP has the potential for much higher audio quality than traditional telephony where the 4kHz upper limit is insurmountably hardwired throughout the entire system and standards.