What im trying to do. I have a large home with 2 door stations (voip) and a call box at the gate (voip) the home owner would like to have every device ring differently, so side door would have a ring, front door would have one, gate would have one, and the actual phone system would have another one. It seems the Yealink phones support this feature, as you just have to send some tags in the invite header, however, I dont think 3cx can do this, unless im completely wrong. My perception of how 3cx sends the info: tag is what type of call it is (i.e. local, international, ivr, etc..) and there is no way for me to tag an Extension with a certain info: header. Is this correct?