Audio Sentinel +»Web/RJ – Web-based Analog Silence Detector

The Audio Sentinel®+» Web/RJ is Broadcast Tools’ next-generation web-enabled two channel stereo silence and phase monitor with an integrated, transparent, 2×1 switcher. It is designed to monitor two analog audio sources, one primary, the other back-up. When silence is detected on the primary input it can automatically switch to the back-up input via mechanical latching relays. It includes a browser-based HTML5 web interface and supports SSL/TLS email (Gmail, etc.), SMS-email notification, as well as SNMP. Its audio I/O features pluggable screw terminal-blocks and standard RJ45 audio jacks wired in parallel for ease of wiring.


The Audio Sentinel®+» Web/RJ can be configured and monitored locally and/or remotely over any IP network, including private networks, IP-based industrial control networks, and the Internet. Users can operate this product using a desktop web browser or web-enabled (HTML5) mobile device. App Store not required. Email and SMS-email notification can be configured to alert up to eight recipients when silence or out-of-phase audio is detected. SMTP username and passwords using STARTTLS (Gmail, etc.) or Base64 authentication are supported. SNMP traps and SET/GET are built-in, allowing multiple units to be monitored and configured with SNMP management software.



  • • Built-in web server provides simple, web-based (HTML5) notification, monitoring, configuration, and control.
  • • Powered by a high-performance ARM® Cortex™ processor.
  • • Support for STARTTLS secure SMTP authentication (Gmail, etc.)
  • • Front panel, remote, and web-based switcher controls.
  • • Both stereo inputs feature silence sensors/phase monitors with front panel activity and alarm LED indicators.
  • • Silence trip level detection from -15dB to -35dB in 1 dB steps for each stereo channel.
  • • Precise alarm time delay from 0(OFF) to 65535 seconds (18 hours, 12 min and 15
    sec’s). in one-second increments for each channel.
  • • Alarm restore time delay from 0(OFF) to 65535 seconds (18 hours, 12 min and 15
    sec’s). in one-second increments for each channel.
  • • Internal, transparent, 2×1 switcher with mechanical latching relays.
  • • If power is lost, the last selected channel is passed to the output.
  • • Email notification may be configured to alert up to EIGHT recipients when alarms
    are detected.
  • • Email logging of system status, along with the site ID may be emailed in time
    spans from once an hour to once a day.
  • • Pluggable screw terminal block and RJ45 audio jacks for stereo inputs and output.Fully RFI proofed.
  • • Surge protected internal power supply, universal switching power supply with domestic connector supplied. International power supply optional.
  • • Up to two units may be mounted on the optional RA-1 rack shelf.