you mean the INBOUND RULES?
I'm new to 3CX system and have no idea on DID setting, I just want to connect 4 direct lines with nos like: 1234xxx0, 1234xxx1, 1234xxx2, 1234xxx3, they'll hunt to each other if line is busy, I got a GRANDSTREAM 4014 FXO port, can you advise how to config the inbound...