How was Samuel called by God?

Samuel was called by god at a very young age, he was kept by his mother in the temple under the priest Eli.Then god called him at night he ran to Eli to see if the old priest wanted anything. This happened a few times and each time Eli said he did not call him. Then Eli realized that it was god calling , so he told Samuel next time you hear the voice say Speak lord your servant is listening.remember that Samuel had been realed all his days by Eli in the synagogue according to the Bible:1 Sam :16;17