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The 1825 Duet Plus® auxiliary ringer is a multi-application loud ringer and paging amplifier for use with business telephone systems in office and industrial applications.
Specifically designed for compatibility with Nortel systems, the Duet Plus works with Norstar, BCM, Meridian 1, CS 1000, analog and Meridian Digital Centrex telephones.
Warble tone output is specifically designed to be non-irritating even at loudest volumes and more effective than shrill piezo type ringers in alerting personnel with hearing impairments, wearing ear protection, or in high ambient noise environments. These advantages are achieved by using a lower frequency range than most electronic ringers.
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