An abnormal auto test signal will be sent every 24 hours if your panel in not in the normal condition.
It will sends a normal auto test if your panel is normal.
Depending on how your installer programmed things, it may send these signals twice a day, 1 for each phone line, or 1 for each communication path.
This is per code. You could have your CS disregard these signals until your panel returns to a normal condition