Algo 1825 Duet Plus Loud Ringer, unit only

Algo 1825 Duet Plus Loud Ringer, unit only

Algo 1825 Duet Plus Loud Ringer, unit only

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. Loud ringing can be activated by a relay or switch closure (dry contacts), low voltage detection, 90V analog telephone ringing, or any Nortel TDM digital business telephone. Specifically designed for compatibility with Nortel systems, the Duet Plus works with Norstar, BCM, Meridian 1, CS 1000, analog and Meridian Digital Centrex telephones. Application notes are available ( to describe functionality and any additional product requirements for applications with M7000, T7000, M2000, M3900, M5000, and analog telephones.

Low frequency tone output provides effective non-irritating notification of telephone and paging signals Interfaces easily with optional Algo 1185 Horn Speaker to provide increased ringing or voice notification volume (up to 112 dBA SPL at 1m (3.3ft.)) Adjustable volume and frequency controls to suit user preferences Dry contact activation from push-button, door-opening controller, or KSU Night Bell/Auxiliary Ring contacts Easy connectivity to BCM Media Services Card using optional 2503 BCM Connector Kit Auxiliary speaker outputs for connection to existing paging systems



Service & Support

1 year




Adapter included; 22V 350 mA Class II