Dual WAN setup with failover, PBX concerns

[jerryd]

Evaluating OPNsense for replacing a untangle firewall

Has anyone done this before?

In simple terms the setup will be

WAN 1  Comcast business Cable Static IP  WAN 2 T-Mobile business gateway with Static IP

LAN 1 192.168.x.x  with IP phones and a FreePBX appliance server, SIP trunking from ClearlyIP.

End goal is a firewall that will use Comcast 100% of the time until failure, then switch to T-Mobile until restored for a period of time

Currently the untangle box is running with just the Comcast gateway enabled, When T-Mobile gateway is enabled I lose voice traffic due to dynamic routes do not properly handle the 2 gateways.

Comcast alone works, T-Mobile works alone so can OPNsense properly handle the routes when they change?

PBX can stay down for a few minutes during the switchover times, but must come back with correct routing for port 5060 traffic.

Thanks

Jerry