Provides personal desktop call recording (and telephone event detection) for analog telephones, analog trunk lines, and FXS ports. Perfect for home or small business analog systems. Relay output provided for connection to optional Algo visual and audible alerters (for ring, in-use, and message waiting indication).  
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The Algo 3400 Security Intercom System is an advanced digital communication solution for security, safety, and access control applications. Up to 2,048 intercom stations may be located indoors or outdoors for employee or public use to request assistance, door access, or communicate with security personnel or care-givers. Integrates with existing telephone equipment (through analog CLID trunk ports).  
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The 3228 Station Port FXS Doorphone provides a simple-to-install telephone-integrated entry security intercom solution for business and residential applications. Visitors cause an analog telephone to ring which enables conversation when answered and the capability to allow remote entry using door release features.  
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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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