Which term refers to recorded numbers dialed by a target phone in real time?

The term that refers to recorded numbers dialed by a target phone in real time is a pen register. A pen register is a device or process that records the numbers dialed from a specific telephone line during a given period. This technology does not capture the content of the conversations, rather it simply tracks and logs the outgoing call patterns, which can be crucial for various investigation scenarios.

Understanding how a pen register operates is essential for those involved in telecommunications, law enforcement, or legal practices, as it plays a vital role in data collection methods without intruding on the communication content itself. This ability to obtain dialing information in real time provides investigators with insights into the calling habits of individuals under surveillance, thereby aiding in more extensive investigations.

Other options, while related to telecommunications and surveillance, refer to different functions or technologies that do not specifically capture numbers dialed in real time the way a pen register does.