andy Posted October 23, 2015 Report Share Posted October 23, 2015 We are running the PBX for years with no major issues at all. Version is 5.2.5 with no setting changes for months. During the last two weeks many external calls that are routed to the IVR do not receive audio. The audio file is working. No codecs have been locked. The IVR works in the internal network. We don't really have an idea how to fix this. Could this be an issue caused by the external providers or is there a setting that could be changed on the PBX? Quote Link to comment Share on other sites More sharing options...
Vodia PBX Posted October 23, 2015 Report Share Posted October 23, 2015 It is not uncommon that the service providers are changing their stuff without telling you about it. It can also be that your firewall locally updated their policy. The PBX itself should be a "low-risk" factor, especially if you did not touch it at all. I would imaging that if you are running out of hard disk space you would see problems; or maybe if you upgrade your operating system, and this one also has a local firewall, it could also cause problems. I would turn on local PCAP recording the the trunk to get some more clue what is happening. Quote Link to comment Share on other sites More sharing options...
andy Posted October 28, 2015 Author Report Share Posted October 28, 2015 Problem solved: We reset the firewall. Quote Link to comment Share on other sites More sharing options...
andy Posted November 10, 2015 Author Report Share Posted November 10, 2015 I have to pick this up again. In general IVR is working, but there is no audio for callers from two German mobile providers. Vodaphone and O2 do not receive audio, but all others do, like T-Mobile. Audio is also OK for all calls from landlines. Strange. Isn't it? Quote Link to comment Share on other sites More sharing options...
Vodia PBX Posted November 11, 2015 Report Share Posted November 11, 2015 So the audio/no audio all happens on the same trunk? As the big carriers also start to migrate to VoIP they are also working on their RTP routing, with all sorts of SBC involved. It is actually a dynamic field, as those guys are also constantly working on their network. Quote Link to comment Share on other sites More sharing options...
andy Posted November 11, 2015 Author Report Share Posted November 11, 2015 Yes. Same number, same trunk, same IVR. Quote Link to comment Share on other sites More sharing options...
Vodia PBX Posted November 11, 2015 Report Share Posted November 11, 2015 Well I would let them know about the problem even though it can be tedious to get to the right person there; what you can do is get a PCAP to see if there is anything that can be done on PBX side to get this working. Quote Link to comment Share on other sites More sharing options...
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