A signal is automatically generated by the UPS which will be understood by
OS400, you must simply tell OS400 what to do when receiving the different
signals the UPS sends. 1st thing to do is get cabled up. Then, assuming you
have IBM support, call them, they are very helpful.
You then can also create a job that monitors for such a signal and dials out
to a pager number.
This "alert" software has nothing to do with JDE by the way, just that JDE
happens to reside on the server.