I once worked at a place that had a huge problem with "glare". That is, someone picking up an outside line would get connected to an incoming call on a regular basis.
At a company meeting I suggested that they order ground-start lines and change the modules on the Merlin to 408GS cards to fix the problem. GS=GROUND START. They had 408LS = LOOP START cards.
Unfortunately, all the "phone guy" heard was "order ground-start lines" and the part about changing the modules on the Merlin was totally missed.
So, for at least a day, nobody could make any outgoing calls.
I asked the "phone guy" what happened and he didn't want to "talk about it". I already knew what happened.
