IN THE ESU OF THE MODEL 28 THERE ARE A COUPLE OF DIFFERENT TRANSFORMER MODULES... ONE HAS A TALL TRANSFORMER AND ONE HAS A SHORT ONE... I WAS JUST TRYING TO RECALL WHAT THE TALL ONE WAS USED FOR... I THINK THE SHORT ONE IS FOR THE LOCAL LOOP OF 60 MA OR SO BUT WAS WONDERING ABOUT THE CURRENT RATING OF THE TALL ONE... ANYWAY THANKS...