I am running 3cx version 8.0.10116.583 together with a coulpe of linksys 3102's and other bits & pieces. The 3102's are confirgured as gateways and ATA's and work almost perfectly. I am having issues detecting PSTN disconnection. I am in Australia on the OPTUS network and can usually detect a CPC signal, however, this can take a relatively long time. I have been unsuccessfull in detecting a disconnect tone despite the various combinations I have tried after hours of painfull searching and testing. Has anyone come across this issue? Is there an authority that should supply the correct tone information or can someone suggest a tool or method that could be used to perform at test. Could the gain, impedance or other PSTN settings be effecting the result? Thanks in advance.