I loaded Distro 1.812.210.58 today. Everything went fine until I added an outbound route to service a group of FXO trunks. Everything worked fine and calls could be made but when I tried a second call with the first trunk busy on either an incoming or outgoing call a busy tone was returned rather than stepping on to the next trunk. The log showed everything busy on the second call.
The trunks were set up as Dahdi trunks and I also tried setting them up as Zap (Dahdi compatibility mode) trunks but the same thing happened.
I have a GSM Gateway which has four individual SIP trunks that connect to asterisk. I set up an outbound route for this and it performs normally, ie when the first trunk is unavailable it steps to the next trunk and so on.
It seems the problem is only occurring with Dahdi trunks so I think I may have stumbled upon a bug but I am unsure if it is FreePBX or Asterisk related.
Before chasing this further I wonder if anyone else has tried this setup and with what results?