Recently we changed our old Asterisk@Home installation to a brand new FreePBX. Everything is working fine so far, but there is something I have been trying to fix.
We have a main DAHDI trunk, that is our main contact phone, connected to port 1. When we receive a call, the inbound route takes the call to an IVR and then to the selected extension.
The thing is, when someone calls and there is another call in the line (playing the IVR, for example), the line is not recognized as "busy". Instead of the busy tone, we are having a ringback tone untill the call hungs up.
I have been looking in the trunk, route and IVR configuration an I wasn't able to find the right parameter to change this. Any idea how I can achive this?
Also, is there any alternative methods to handle calls when line is busy aside the voicemail?
Thank you in advance.