Suspending punishment

I have filed a complaint against one of my colleagues and the police transferred the case to the public prosecution and then to the court. I have attended some hearings of the case when the police requested to give a statement. The court has pronounced the judgment and the colleague was punished for the offence. At the same time, the court has suspended the punishment against him. Now he is free from all punishments and was released from custody. What is this procedure? How the punishment gets stopped?

Under what circumstances a suspended punishment from the criminal court will be reactivated? A colleague brought in certain medicine and a punishment was issued in his absence. Later the case was handled by a lawyer and has obtained a judgment suspending the punishment.