In order to receive a copy of the Active TDM Over-Air Specification for Electronic Toll Communications you need to take the following steps:

  1. Review the applicable individual or company license by selecting the button below.
  2. Upon completion of your review, select the “Next” button and fill in the registration form.
  3. You will receive a confirming email and will then be able to login and download the Specification. You will also receive automatic updates if new versions or new documents become available.


If you have any questions on the download process email us at: opentdm@kapsch.net