The traditional practice of telephony tries to eliminate noise and uncertainty by creating an optimally short and uninterrupted circuit between caller and callee. It assumes a stable route. The internet, on the other hand, counts on chaotic change, and it will overtake the entire phone system soon. It sends messages (including voice) in fragmented bits scattered along redundant routes, and then resends whatever the haphazard process loses to noisy lines. Rather than prohibit errors, network logic assumes errors and learns from the chaotic flux. Find where the flux is, and ride it.