Night Bell Over Paging Adapter. The K-600F eliminates the installation of multiple bells, relays, and power supplies, wherever night bells, loud ringing, or emergency tones are required. The K-600F provides an existing paging amplifier with a pleasant electronic warble tone each time it receives ring voltage from an analog PABX/KSU extension. The K-600F requires no external power supply and provides a floating 600 ohm audio output. Paging In and Out terminals are provided to allow automatic switching between paging and warble audio when used with an existing paging installation. A set of N.O. / N.C. relay contacts are provided that switch in cadence with the ring signal. Volume and tone controls are also provided. Applications Night bell over paging Loud ringing over paging Contact closure on ringing Visual indication of ringing Features Powered by ring signal no external power supply required Provides tone over existing paging amplifiers Terminals for automatic switching between paging audio and warble tone Auxiliary relay contacts provided Connects directly to ringing analog PABX/KSU stations with RJ11 or terminals Floating 600 ohm audio output LED indication of unit activation.