The easiest way to create a large number of objects  items (devices / tasks / filters / schedules / etc..) in the Dotcom-Monitor system is to open a support ticket and ask the support team for assistance.  They may direct you to input all of the objects that you want created into a spreadsheet with a column for each relevant field.

Once your spreadsheet is completed you can attach it to the support ticket or email it to support and they will populate the changes for you.