Bandwidth Sip Configuration

[Regis_Technologies_USA]

I have just made the switch to bandwidth.com as my provider for sips. I am having a great deal of trouble connecting to them. I have verified the bandwidths IP and have given them my IP of the 3cx machine. Nothing will connect. After phone call after phone call they are not able to figure it out. Hoping someone knows any configurations that are required for 3cx to connect.

 

[YiannisH_3CX]

Hello @Regis_Technologies_USA

The first you need to verify is that the PBX can pass the firewall checker successfully. Since Bandwith.com is using a IP based trunk there is no registration involved. The calls should go to the IP specified under the trunk settings.
Run a wireshark capture and see if the PBX is sending the Invite correctly. Also check the Activity log after an outbound call attempt and see if there is a clue there as to that is going wrong.