The Call to Prayer(AZAAN)
The Azan is uttered in a loud, albeit sweet melodious, voice to announce to the faithful that it is time for the Obligatory Prayer and to invite them to offer the prayers. Those who perform Azan are known as 'Muezzin.' The honour of being the first Muezzin goes to Hazrat Bilal(R.A.), a black slave who converted to Islam. He had a very sweet, resonant and musical voice. He was appointed as Muezzin by the Prophet(peace be upon him) of Islam. The appointment of a black slave as the first person to call Muslims for prayers, shows that in Islam all human beings are treated as equals. Rich or poor, black or white, short or tall - all are equal in the eyes of Allah. It is the piety of each individual that makes the difference.
Azan is recited in a loud voice by the Muezzin facing the direction of the Ka'ba in the following words, which are said in the order mentioned:

"Allahu Akbar" - recited FOUR times. Meaning, "Allah is the Greatest."(four times)
"Ash-hadu an la ilaha ill-Allah" - recited TWO times. Meaning, "I bear witness that there is none worthy of being worshipped except Allah."(twice)
"Ash-hadu anna Muhammad-ar-Rasoolullah" - recited TWO times. Meaning, "I bear witness that Muhammad is the Apostle of Allah."(recited twice)
"Hayya 'alas-Salah" - recited TWO times. Meaning, "Come to prayer."(turning the face alone to the right and saying it twice)
"Hayya 'alal-falah" - recited TWO times. Meaning, "Come to Success."(turning the face alone to the left and saying it twice)
"Allahu Akbar" - recited TWO times. Meaning, "Allah is the Greatest"
"La-Ilaha Il-Allah"- recited once. Meaning, "There is no other object of worship except Allah."