Window Techs offers Nurse Call System & Nurse Call Bell System in India. Get Nurse Call System Manufacturers & Suppliers at best price. Window Techs is a dominant influence in healthcare innovation and services by working with CARECOM- A JAPANESE company with over 20 years of experience in the hospital NURSE CALL SYSTEM. We also have to ensure that we meet and often exceed the often stringent safety standards that the various systems demand. These include, for example, meeting standards related to Nurse Call systems in hospitals and Cell Call Systems in prisons.