Hi Folks, We seem to have an issue in testing, whereby calls placed via 3CXPhone in CTI mode with Snom 821 handsets result in no ringing and the audio only starts when the call is connected. If I dial on the handset it rings and call connects, I dial the same number via 3CXPhone and I get silence until the call connects. Is there something configuration I have missed that needs to be different? I haven't packet captured yet to see if there is a difference in the SIP negotiation, but that is probably the next step. Regards, Richard.