TDS taps Calix for VDSL2 upgrade JANUARY 5, 2011 — TDS Telecommunications Corp., the nation’s eighth-largest wireline communication service provider, is upgrading its infrastructure of Calix C7 Multiservice Access Platforms (MSAPs) from Calix, Inc. (NYSE: CALX) in 20 states. Targeting 25 Mbps downstream and 5...