Hello, In the first time I want to thank you very much for this great module! I use the Simple part of the module to write a little script which must create a call and close after a few seconds. It works perfectly when I disable the authentication of my virtual SIP phone. But when I want to use the authentication, I see a trouble. Indeed the process to have an authentication is: - send the default message (register for example) - The gateway replies with "401 Unauthorized" header - send the message with the correct header - The gateway replies with "200 OK" header This process is done automatically when I register the virtual SIP phone, but when I want to close the call with a BYE message, I receive a "401 Unauthorized" header and I don't know I must do to send the next message. Can you help me or explain me if I do something wrong. Thanks, Youk