It is permissible for the imaam to call the adhaan, say the iqaamah and lead the prayer

 

Is it permissible for the imaam to call the adhaan, say the iqaamah and lead the prayer at the same time?

Praise be to Allaah. 

Yes,
that is OK.

 It
is permissible for the imaam to call the adhaan, say the iqaamah and
lead the people in prayer at the same time, because all of these acts
are acts of worship and obedience. There is nothing wrong with that,
because it is done for the sake of obeying Allaah and drawing closer
to Him. And Allaah knows best.