T-Carrier Preview

Here's a preview of the progress I've made so far on a video about T-Carrier (i.e. T1 and T3). I'll be covering T3 hands on in the video eventually but I've had a ton of travel (and more to come) so progress has been slow.So far the history of T-Carrier and part of a technical explanation of T1 is done, let me know if I've made any mistakes and I'll try to re-shoot those for the final video!