I have V 8.0.10116.583 of 3cx installed on a Windows 2008 server in a Public data centre. In my office I have my PC with the 3CX VoIP phone and a Linksys ATA. I have 1 main extension and 1 test extension set up on the server as 100 (main) and 101 (test) I also have a DID which is setup with the main extension. At the moment if I call from the ATA (ext 100) to the soft phone (ext 101) the call connects as it should, but there is no audio between the PC and the phone. If I call from the soft phone to the ATA the soft phone and 3cx look to connect but the phone on the ATA doesn't ring or seem to register the call. if I use the DID to call the ATA (using my mobile phone) it's the same, but if I set the soft phone to ext 100 it rings no problem although there is audio from the soft phone to the mobile there is no audio from the mobile to the soft phone. This is the same for connecting to the VM, it looks to connect but there is no audio, although when connected via the DID the option to leave a message is perfectly clear, but I don't know if any of the test messages I have left were successful.