Viking Advanced Loop Detector loop detect board for ring and line in use contact closures Provide a contact closure during ringing and/or off hook Monitors an analog phone line for ringing or an off hook condition A built in relay can be activated when either of these conditions are detected This is ideal for monitoring line status or for providing a visual indication of such Disable input is ideal for two button emergency phones, such as Viking's E 1600 20A, allowing Info button calls to be placed without activating the relay turning on the emergency strobe light, camera, etc. 3 DIP switches are provided for turning ring detection on or off, off hook loop detection on or off and for selecting a ring cadence mode which allows the relay to follow ringing or to remain activated during the off time of standard ring cadence Complete with a 12 VDC power adapter Can also provide switched 12VDC .35 Amp output to power external lights, etc. during ringing and/or off hook conditions Applications control a strobe or beacon light for ring indication, provide relay closures on off hook, trigger a security camera, trigger a tape recorder, phone in use indicator Detects ring voltage and off hook loop current On/off switches for ring detection and off hook/loop detection Screw terminal connections Selectable ring cadence mode relay can remain on between rings Wall mountable with foam tape included or screws not included Switched 12V DC output follows relay activation for powering strobe lights, cameras, etc. One set of NO normally open and NC normally closed relay contacts provided Disable input, ideal for use with two button emergency phones E 1600 20A , will not activate relay on Info calls Made in the USA 1 Year manufacturer's warranty Power 120V AC to 12V DC adapter provided VKLDB3