A multi-application loud ringer and paging amplifier, the 1825 features a non-irritating and highly effective warble tone output that is ideal for general office or small plant applications. The unit is compatible with dry contact closure, analog telephones, FXS ports, and Nortel digital telephones including Norstar, Business Communication Manager (BCM), Meridian 1, and Communication Server 1000 (CS 1000).  
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