Is the adhan prescribed for travelers when they pray in congregation?

Question:
May Allah reward you, Honorable Shaykh. This questioner says: Sometimes when we are traveling, we stop by the roadside and pray, and we do not call the adhan for the prayer. Is this action valid? And is the adhan prescribed for us?

Answer:
The adhan is not obligatory, but if you call it, it is more complete and better. Some scholars hold that it is obligatory. No? Some scholars hold that it is obligatory for the congregation to call the adhan if they are praying in congregation. However, the majority hold that it is not obligatory while traveling; the adhan is for those who are resident.