Channel

AT&T Tech Channel

2 recommended videos. Channel on YouTube

1. 

   1 AT&T Archives: Similiarities of Wave Behavior (Bonus Edition)

   AT&T Tech Channel 32 people · 53 months · since Sept 2012

   A vintage Bell Labs film using a mechanical wave machine to show reflections, standing waves and impedance mismatch, often linked to make transmission line concepts intuitive.

2. 

   2 AT&T Archives: The Step-By-Step Switch

   AT&T Tech Channel 3 people · 3 months · since Feb 2015

   Archive film explaining electromechanical step-by-step telephone switches, recommended for understanding how exchanges routed calls before digital electronics.