from reputable manufacturers...
Kentec Syncro AS Fire Alarm System
Syncro AS is a versatile range of open protocol fire alarm control panels compatible with existing Syncro fire alarm panel technology. Available with a single detection loop capable of hosting up to 126 devices (Apollo), 240 devices (Argus Vega) or 127 devices (Hochiki). Syncro AS uses leading edge microprocessor based electronics to provide a flexible control system with high reliability and integrity.