Century Link land line incoming call

In this video, I have my telephone company test set also known as a butt set, monitoring a incoming call while on hook. This is a Western Electric #5ess off of a copper t-1 concentrator about 16 miles from the c.o.406-458

[@MichaelWallace-oq3wd]

Wow that's freaking cool! You can hear the Line hum coming from that nice line!