The Internet carries nearly 160 times more traffic than voice networks in North America, yet many of the regulations and inter-carrier traffic fees are based on the quickly receding era when voice networks ruled. Google calls this the "Tail Wagging The Dog" in a letter to the FCC (embedded below) urging them not to impose antiquated per-minute voice traffic fees on IP networks. This is becoming an issue as IP voice traffic approaches that of traditional circuit-switched voice traffic. Google illustrates the changing nature of the network in a series of dramatic slides.