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The NEC DSX Room Monitor feature lets you monitor the sounds at another extension.

Room Monitor

Use Room Monitor to monitor the sounds at another extension. A typical residential application is to use Room Monitor to listen for sounds in an infant’s room. In a commercial setting, you can use Room Monitor to monitor for activity at a reception area or warehouse entrance. To set up Room Monitor:

1. Enable Room Monitor at the keyset extension to be monitored.

2. From any other extension, place an Intercom call to the extension you wish to monitor.

The monitoring extension user can hear everything picked up by the monitored extension’s microphone. They can place and answer calls normally and automatically return to monitoring when they hang up. Additionally, the user can press a soft key to make an Intercom call to the monitored extension, or press a different soft key to end monitoring and return to normal operation. The monitored extension is completely dark and quiet except for illuminated (green) INTERCOM and DND keys. Incoming ringing, paging, and voice announcements are disabled and the Feature Key LEDs are off.

The monitored extension user can place calls and return automatically to being monitored when they hang up. In addition, the user can press a soft key to make an Intercom call to the monitoring extension, or press a different soft key to end the Room Monitor session.

Up to 7 extensions can simultaneously monitor the same extension. Each extension in a Room Monitor session (including the monitored extension) uses a system Conference circuit. This means that the maximum number of extensions in a Room Monitor session (8) uses up 8 Conference circuits.

Firmware 2.01 and higher.