AKA A dialed number recorder (DNR). This device records all numbers dialed from a particular telephone line. For law enforcement agencies to get a pen register approved for surveillance, they must get a court order from a judge. You might have heard this term used on television once or twice.
We need to get a pen register on all the payphones from the low rises, so we can find out who these drug dealers are calling.
by WhatTheKweh March 19, 2018
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