You are “on call” for a two week period of time. Therefore, every night for two weeks (beginning after 5:00 p.m. on the Friday before your term begins), you should call the automated jury information system at (404) 215-1501. If the message says that you have to report for jury duty, then you would report to the courthouse the following day.
If you serve on a case which concludes during your two-week term, you remain “on call” and may serve again. If your case extends beyond the two-week period, you are required to serve for its entire duration (this occurs infrequently).