[DoofusOfDeath]

I'm curious how the PSTN makes it work so well compared to the IP-based architectures.

It makes me wonder if the best system would marry PSTN for audio with IP for video and/or screen-sharing.

[briankwest]

You use FreeSWITCH to marry video to PSTN. WebRTC Screen Share works with FreeSWITCH Video conferencing too.

[manishsharan]

I think WebEx does that already. Our organization uses Microsoft Lync for screen sharing with phone conference lines.