3cx with AT&T SBC

[blang008]

Having issues getting a customer setup with AT&T SBC onsite. PBX to Switch, Switch to SIP port on SBC. Gave AT&T a private IP to configure on their LAN interface of the SBC. Create SIP provider for AT&T and use the private IP for the sip server. Will this work? At one point we had inbound calls working but not outbound. Got to be something i'm missing.

 

[NickD_3CX]

I am not sure if this will work as this also depends on the Provider, but I would imagine that you must also populate the "Outbound Proxy" field in the Provider Settings to be the LAN IP of the SBC.

 

[JCarnes]

Were you ever able to get this resolved? We seem to have a similar setup and issue with a Bright House trunk.