What method of call sign identification is required for a station transmitting phone signals?

The method of call sign identification required for a station transmitting phone signals necessitates sending the call sign using either Continuous Wave (CW) or phone emission. This approach adheres to the regulations set forth by the Federal Communications Commission (FCC), ensuring that all operators appropriately identify their station.

In a phone transmission, using voice emissions to convey the call sign is common; however, regulations also allow for the option to send the call sign in CW format, providing flexibility in identification methods. This dual-method approach is crucial for ensuring that a broader audience or various types of operators can recognize and respond to the station, enhancing communication clarity and compliance with amateur radio guidelines.

The other options do not align with regulatory standards for call sign identification during phone transmissions. For instance, sending a call sign followed by specific indicators or using other distinguishable transmissions instead of sticking to the allowed identification method wouldn't meet the requirements set by the FCC for amateur radio operations.