The LDB-3 Advanced Loop Detector 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. The LDB-3 s disable input is ideal for two-button emergency phones such as Viking s E-1600-20A allowing in.
Supports Very High Speed Data. Stimulates loop start phone lines * Allows 2-way communication between telecom devices or systems. Produces precise dial ringback busy reorder and S. I. T tones * 911 mode for classroom training * Audio input/output jack for amplified speaker or loading voice mail systems...