code: private void dispatchLegacyEventIfNeeded(ManagerEvent event)
      {
          if (event instanceof DialBeginEvent)
          {
              DialEvent legacyEvent = new DialEvent((DialBeginEvent) event);
              dispatchEvent(legacyEvent);
          }
      }
docs: Enro 2015-03 Workaround to continue having Legacy Events from Asterisk
  13.