The E.164 format offers numerous advantages, but must usually be set manually. In the case of merged accounts and extensions of number blocks, signaling is always in E.164.

Especially when setting up phone numbers in PBX systems, the conversion to E.164 is worthwhile, as it simplifies uniform routing of all calls.

More about the two modes:  Phone number formatting for incoming calls

How to change the mode for incoming calling line identification

1. Übersicht der Rufnummern aufrufen

2. Rufnummer auswählen

Do you have a private customer plan? If so, please click on “Private”!

3. Einstellungen aufrufen

The phone settings for businesses are divided into two tabs: Connections and Phone Numbers.

In the Connection Overview, please click on the connection whose details you wish to view.

You will see an overview of your telephone numbers.

Please click on the one whose details you wish to view.

3. Choose signaling mode

Now you have the choice between the two modes "E.164 format (recommended)" and "International format".

Finally, please click on "Apply" to complete the process.

Back

Created on: 21. October 2025