Hi, I have successfully connected an SPA 112 to 3CX v11. It can call an extension and my VoiP provider but, when I call it, I cannot get the analogue phones connected to it to ring. If I ring one of the extensions and pick up the analogue phone, I can use the phone without a problem. Everything works except for it not ringing. I've played around with the following in the SPA 112 regional settings section but, still have not been able to get the ringing to work. Ring Waveform - Tried Sinusoid and Trapezoid Ring Voltage - Used 70 as described on various website for the UK Ring Frequency - Used 25 as described on various website for the UK CWT Frequency - Currently using 400@-10 Any help would be very gratefully received.