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.
For Electronic Key Phones * Broadcasts and amplifies telephone ringing tomes over horn or paging speaker. Amplifies call announce messages and ringing tones when connected to the speaker leads of an electronic telephone * Also useful for expanding the number of speakers connected to PA-2A or CPA-7A...
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