... read Built in bell scheduling S-200 home security system Introduction:The S300 is a proximity time ... OEM customers and software developersSpecifications: NameS-200 home security systemTransaction Capacity100,000Hardware PlatformZEM500Operation SystemLinuxCommunicationRS232/485, TCP ... SMS, DLST, Automatic Status Switch, Scheduled-bell, Self-Service Query, 5 digit user IDOptional FunctionsADMS, Print, ...