Maybe this is easy, but I am a asterisk beginner …
I am using asterisk with only ip-phones and SIP-proxy (voipbuster.com).
I have incoming voip-calls from voipbuster routed to a Grandstream-488 ATA on my local network. This works fine. But the caller-id shown on the display of my phone (connected to my ATA) shows “asterisk” instead of the phonenumber of the caller.
When I use the Grandstream-488 directly with SIP connecting to voipbuster (so without using Asterisk), I do see the phonenumber of the calling-party, so I think the number is sent.
Can I configure asterisk so that it repeats the caller-id code to the extention (my ATA) ??