I’ve seen several posts around the net from users that want to distribute the calls across multiple trunks with FreePBX. The main reason being that they have a deal with a provider, and each line has 4,000 minutes for free, etc. After looking around at the different methods to accomplish this, it become very clear what must happen.
If your trunks are FXO ports/Analog then you are in luck.
Go to the FreePBX interface, click on Trunks.
-Add a trunk
-Put ‘r0′ for the Zap identifier (that’s R zero)
-Set the round robin Zap as your outbound route and enjoy!
Simple and clean, enjoy.