Worries me a little about VoIP replacing TDM
As telephony becomes an app on what is increasingly just an IP network, I senvdelu hope that the telcos are being made to plan their networks as robustly as the old designs.
The old digital telephony networks were basically designed to be indestructible, even if a war kicked off and a city were wiped off the map, they could reroute calls.
I'm seeing a lot of moves away from small, very distributed digital TDM exchanges that could do some degree of independent routing around problems. They're being replaced by reliance on large softswiches in data centres and increasingly when you're dealing with smaller providers using their own VoIP networks you've no idea what level of resilience you have.
Regulators need to be much more proscriptive about insisting on proof the networks won't just fall over due to a single point of failure.