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.