We are using SIP Trucking at our facility we had it working great until recently when we swapped ISPs.
We have SIP Helpers on on the Fortinet and never had a issue till now...
Here is our setup
Our SIP goes over the internet and fails over when a WAN cannot be reached. We are having issues with our WAN2 invites from our phone system flowing over to WAN1. I notice this ONLY happens when the session is expired and the phone system initiates it out.
When I call in the session is created from externally and keeps the second SIP Session going for a bit.
Is there any settings i should look at or change?
SIP Trunk 1. WAN1
SIP Trunk 2 WAN2