At MAN/EGCC, we get "stepped on" transmissions at least 10 times per shift. [7am-10pm] Nights only 2-5 times
I [stand to be corrected] think that the scenario goes like this....(on 'some' airlines). Captain sits down, and calls Ground, on F/Os headset...Result is cr*p tx, and NO rx, until mistook is found. OR headset on and talk first, listen later.
we aim to please, it keeps the cleaners happy