Extension 70 and 77 can't be created

[Thomas Friedl]

I'm trying to setup the extensions 70 and 77 - for both I get a message saying I can't use them. Since we are porting from another phone system those are already in use and I would like to keep them.

Is there a way to assign the extensions 70 and 77?

 

[YiannisH_3CX]

Hello @Thomas Friedl

If you restore a backup of a previous version to the latest 3cx installer for V15.5 the installer will restore the extensions and allocate the system extensions to different numbers.
If you have already installed the system and trying to change the systems extensions please note that this cannot be done as these are system extension that are used from the phone system.