Nurse calling system is considered as an integral part of modern health care services. Quick to install, this medical system is equipped with colored indicators based audio arrangement that enables nurses to monitor rooms of patients as per room, cabin number simply by following sound coming from there. Indicators of nurse calling system are used to denote urgency of patients call i.e. call made by patients of emergency unit or general ward. Provided Nurse calling system has received appreciation of users for its smooth operation and excellent clarity of audio.