Calling out the Azaan before the Jumuah Khutbah in the Musjid

Q: When calling out the azaan in the musjid is makrooh, then why is the azaan before the jumuah khutbah called out in the musjid?
A: The law of the azaan given before the khutbah is different to the azaan given for the five daily salaah. In regard to this azaan, the sunnah is that it should be given in the musjid. The purpose of this azaan which is called out near the mimbar is to conscientize the people who are in the musjid that the khutbah is about to commence and that they should complete their salaah and zikr and listen attentively to the khutbah.