Ordinarily, how often would a station using a telephony emission identify?

In the context of FCC regulations for radio stations employing telephony emissions, the correct identification protocol requires that the station identify at the beginning and end of each transmission and also at 15-minute intervals.

This is a crucial aspect of maintaining proper communication standards and ensuring transparency in radio operations. By identifying at the start and finish of each transmission, listeners can easily recognize who is transmitting and the context of the communication. The requirement for additional identification every 15 minutes serves to continually inform listeners, and it helps to avoid confusion, especially in busy operator environments.

The frequency of identification also integrates into broader regulatory measures that promote orderly communication and limit interference among broadcasters. Following this protocol enhances accountability and allows for better tracking of radio communications, especially in emergencies or important public broadcasts.

The other provided intervals, such as identifying every 10 minutes, 20 minutes, or only in the presence of public correspondence, do not align with the established FCC mandates and would not ensure the level of identification and clarity required for telephony emissions.