Which of the following electronic devices record the numbers dialed from a particular telephone?

Question

Quizplus · Accepted Answer

Pen registers are electronic devices that record the numbers dialed from a particular telephone. Hidden cameras or video-recorders in private places and spike mikes are not relevant to recording dialed numbers, while electronic surveillance is a broad term that could include recording dialed numbers but does not specifically refer to them.

Which of the Following Electronic Devices Record the Numbers Dialed