Adding new numbers


I have a new range of DDI numbers and need to add them to my Asterisk server.

How do I do this?

Many thanks.

in context, where You handle incoming calls put only
ring some of Yours ddi and observe asterisk console

I hope this isn’t considered dredging of old threads, but I have the exact same needs. Am I right in understanding that only the extensions.conf page needs to be changed if I want to add more incoming numbers? I didn’t quite grasp the instructions that the person above me provided and would appreciate a bit more help.
Thank you,