In the hadith, "Whoever says when he hears the call to prayer..." Is the intended meaning at the end of the adhan or during it?

Question:
He says: Honorable Shaykh, may Allah grant you success, in the hadith to the end of the hadith, what is the meaning of "when"? Is it at the end of the adhan or during the adhan?

Answer:
He follows the mu'adhdhin word for word, saying what the mu'adhdhin says. Yes.