This is the Amano TimeGuardian Bell schedule software.  Use this example to set up your bells.  Press the + button at the top to add another line of bell signaling events.   You can vary the duration of the rings, a short one for a two-minute warning, and a longer one for the "get back to work" shout that you are currently enjoying.

Your clock terminal will need a low voltage power supply to run the onboard electronic relay.  We build power supplies specifically for the Amano TimeGuardian MTX-15 and MTX-30 time clocks.  We also sell bells and loud industrial horns aka work shift buzzers, for these machines.  We can even link them to your existing bells, buzzers, or paging system (you will need a tone generator to do THAT, as all the time clock does is send out voltage, not a sound wave).

This is the Amano TimeGuardian Bell Signaling software module:

Click here to see our work shift timers, bells and buzzers, and of course, the Amano TimeGuardian time clock systems.