Apology for reviving an old thread. (Well a week old anyway).
Where have the terms CM1, CM2 come from?
EG. CM1 headset inop.
This has started to appear mainly, from my experience, on middle eastern carriers.
I first came across it about 18 months ago and had to ask the er, chap sat at the front on the left, what it meant as it was in the tech log and no one knew what it meant.
