Is the adhan and iqamah obligatory for one who prays alone, or is the iqamah sufficient?

The questioner:
He says: Honorable Shaykh, may Allah grant you success. He says: A student sent abroad for study, and prayer time catches him while he is at the university, so he prays with an iqamah without an adhan. Then one of them said to him that the adhan is necessary. Is his statement correct?

The Shaykh:
The university where you are.

The questioner:
Far away. Yes.

The Shaykh:
It is not obligatory for a person to give the adhan; it is not obligatory for a person to give the adhan. He gives the iqamah and prays, and praise be to Allah. Yes.

The presenter:
Yes.

The questioner:
He says: Honorable Shaykh, may Allah grant you success.

The Shaykh:
And the Messenger (peace and blessings be upon him) said, if you are two No, even for one person, this is not obligatory. Yes, it is recommended for him to give the adhan, but as for obligation, no, it is not obligatory. Yes.