Elevation Technician Lingo

"Independent Lift Services, can I help you"
"I wanted to find out how much it would cost to change our lift panel - let me explain what happens - a person gets in and presses the button for their floor and the lift goes to that floor but if someone is waiting at a floor between they can't stop the lift - they have to wait until it goes back down to the bottom to start again."
"Let me put you through to a lift technician... putting you through..."
"Hello"
"Hi, we have a funny lift that will only let one button be pressed at once and we wanted to get a quote for how much it would be to change it to make it let all buttons be stopped at once."
"So, what happens exactly?"
"A person gets in and presses the button for their floor and the lift goes to that floor but if someone is waiting ... Does that make sense?" Colleagues corpse in the background, totally confused by the first and second explanations.
"Yes perfectly - that's what is known as 'single collective only' and what you want is 'full collective'."
I am astounded. There are descriptors, simple descriptors, for what I am talking about. He understands me, I can now describe our lift workings without having to resort to long complex scenario. I feel liberated and knowledgable. When I come off the phone I teach everyone my new found lingo. They all think I'm nuts.