Thanks @Charles_3CX, but that was not the question. I'll rephrase : In the admin console of the 3CX Phonesystem V20, where can I find the public IP address of on SBC ?
@TheodorosG_3CX, that will do.
But as @SteveITS points out, in V18 it did show on the Trunk Page, and was easily to retrieve...
This is not a improvement over v18. I will make a Feature Request. Oh no, Bronze and Silver partners are no longer allowed to do that.