What is the effect of having five periods (e.g.-meanwhile.....) in the text of a TELEX transmission on an Inmarsat-A SES?

Correct Answer: Option C — The transmission will automatically terminate after those characters are transmitted.

Inmarsat-A TELEX protocols utilize specific character sequences as control codes to manage session termination. The transmission of five consecutive periods (.....) acts as a standardized end-of-message signal, instructing the Coast Earth Station to terminate the connection and release the satellite channel, thereby preventing unnecessary airtime charges.