Hi, 3CX works well with my: [*]Within Internal extensions, softphone and IP phones [*]SIP Trunk lines, various providers [*]Skype trunk [*]GSM gateway But , almost always(97%) cutting voice(stuttering or totally lost) when placing or receiving calls(sometimes immediately,sometimes after a while...) over an analog line gateway I'm using a Patton SN4114(recommended and supported hardware for 3CX) , loaded with the 3CX configuration template. I bought this gateway because I was using a GrandStream GXW4104 before and was having the same problem. My network is well, not having major or noticeable problems with the other trunk types/extensions. Have someone figure this out? Is there a setting to enable/disable in 3CX/Patton for this to work well? Somewhere to look? Any help or insight deeply appreciated.