See my post on ITIF’s Innovation Files blog in the transition from the telephone network of the past, AKA “TDM” to the IP network of the present and future. Three of the four major cellular companies have announced big upgrades to their networks to support LTE, the all-IP version of mobile networking, and AT&T is asking the FCC to run a policy experiment on the transition from the old network to the new one. The title is: “Facilities-Based Competition is Working.”