PC Signals software is installed on either a Windows NT/2000/2003 server as a service, or a Windows based standalone PC in the task tray. This allows the program to run with a very small footprint and continuously monitor the PC time and date to signal the PC Signals relay device via the serial port (Com1-4) to sound horns or synchronize wall clocks throughout the building. PC Signals Config screen has control for the two relays in the synchronizer box, one which is commonly used for bells or horns, and a second which can be used to sychronize wall clocks. There are 5 levels where schedules can be assigned with a start date. This is to allow for change of schedules by season etc. When setting up levels, schedules can be copied from one level to another to save typing time. There is also a manual operate button for single event singnals like employee meetings or system testing. PC Signals Scheduler screen shows the name of the level and effective date and time that this schedule started or will start. All that is required to add an event is to enter a description, time and duration, and day of week for the event and save. There is room for up to 60 events per level, which should allow room for even the busiest bell schedules.