At first log in at the web interface of your SMS Gateway. If you have not yet uploaded a valid license file you need to do it now.

To request a license the gateway's clock information must be set properly.
Check the NTP settings under Configuration - General

Fill in all the fields in the form and click Anfordern.

Send us your License Request via email:

After checking by the Braintower Support Team you will receive a license file that can be uploaded beneath the registration form. The license file retains its validity for all further updates. Keep it in a safplace!

Froversion3.0.7, it is possible to rename the license file before uploading to the Braintower SMS Gateway.
Former versions do not allow that!