[Machine] The Messenger of Allah, ﷺ , had only one mu'adhdhin, who would call the adhan when he sat on the pulpit and would call the iqamah when he descended. Abu Bakr and Umar were also like that.
مَا كَانَ لِرَسُولِ اللهِ ﷺ إِلَّا مُؤَذِّنٌ وَاحِدٌ يُؤَذِّنُ إِذَا قَعَدَ عَلَى الْمِنْبَرِ وَيُقِيمُ إِذَا نَزَلَ وَأَبُو بَكْرٍ كَذَلِكَ وَعُمَرُ كَذَلِكَ