Hi All, I'm having a hard time to setup the Fax Server at my 3CX application. According to the tutorials should be really straight forward however I'm not able to figure out. Got the logs and when I call the number I get the Fax beep but any attempt to delivery the message fails. Every message creates a xml file where the error line is: <RCV_ERROR>Call was either not from a fax machine, or else fax handshaking failed</RCV_ERROR> I'm not sure where is the gap. The Media Server logs show: No RTP packets were received:remoteAddr=127.0.0.1:10002,extAddr=0.0.0.0:0,localAddr=127.0.0.1:7292 My VoIP provider supports T38 and under DID I have "Send fax to: email of extension 8888 ( Fax Extension) I have the extension number email and authentication password. I can see that the server is being registered under the logs. 18:07:30.651|2868|(0):FAXServer, (User nai 1) SSC Evt (Register): Receive FOIP__SIP_REGISTER_RQ 18:07:30.652|3280|FaxServer.cpp(213):FAXServer, MainServiceProc::Run(), Service started Do you guys have any direction where I'm missing here ? Thank you in advance.