If it was an STL issue, why did they not send someone to the transmitter site with a Blue Box or HotLine and get it back on the air using POTS? You have to plan for STL and ISDN down time and have a third backup. If no Blue Box or HotLine, grab a small mixer, a cd player, and some CDs and put that on the air from the transmitter site. The dead air can mean station money loss from spots missed. If it was a transmitter issue, that is another story, depending on the brand and model of transmitter. Harris will overnight parts. However, if it is a Harris box, I have known them to run at reduced power, at least, with a dead module, if the box is solid-state.
for goodness sakes....they are just in the midst of moving the station to a new studio...all of Cumulus moved...don't get your technical panties in a bunch....geeze