The cop enters the section, cracks a metal wand on a metal “security” button outside each cell. This contact-cracker creates a loud beep. They crack that pipe on each damned button until it elicits a response. Then continue on to the next button. Crack-crack-beep, crack-beep, crack-crack-crack-beepity-freakin’ beep. Try and sleep when all this happens every 30 minutes, 24 hours, seven days a week.