I am connecting a 3CX server to a 3rd party PBX via SIP. The 3CX instance has 4-digit extensions for all users. I created inbound calling rules, one for each extension. But is that even necessary? The 3rd party PBX is passing exactly 4 digits and they match the extensions. My questions are: 1) Do I need an inbound rule if the digits being passed match the extensions? 2) If rules are needed, can one create a single *-to-* rule? I searched the forums and didn't see an answer to my question. But I did see one out on the internet where somebody said wildcards are not accepted. However that post seemed dated and wonder if there have been changes over time.