3CX needs the following ports forwarded to the VOIP server in order to work. The documentation does not by default describe which ones are meant to be TCP and which UDP so here they are:
- Port 5060 (TCP and UDP) – Used for SIP protocol transmission
3CX needs the following ports forwarded to the VOIP server in order to work. The documentation does not by default describe which ones are meant to be TCP and which UDP so here they are: