The Alpha Communications®/Tektone NC200N series audio-visual nurse-call system is designed for health-care applications where voice communication and visual indication is required. The NC200N system can support one (1) master station per system. When a remote station is activated, the NC200N annunciator will sound an electronic tone and will light, indicating the location of the call. The tone signal can be silenced at the master station (and/or at the optional LI150B remote duty station(s) for non-emergency calls). The individual switch/light will remain lighted until the remote station is reset at the point of origination, or when answered by voice from the master station (for remotes with voice capability only). The NC200N master annunciator is modular (in multiples of 20 lights) and can desk mounted only. If you need a flush or surface audio-visual master, use our NC150N series master. The NC200N features built-in tone signal, and tone silence button and light. Model ST005D 'TEST' buttons are used on each PM200/20N annunciator lamp module for lamp testing. A press-to-talk button enables the NC200N master to speak with any voice type remote station. Each NC200N master has a built-in amplifier with voice volume controls, nurse-follower function, and group call for groups of 10 (or less) remote voice stations. An optional model TA200N handset, can be installed onto any master station, for private voice communication, or for very noisy environments. NOTE: The TA200N must be ordered with the master station.