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

In the Overview of SIP trunks, please click on the trunk whose settings you want to adjust.

3. Einstellungen aufrufen

In the "Configuration" section, click on "Change".

A window with numerous settings for this SIP trunk will now open.

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.