hi, I have a question about Asterik 11.2.1, and I really hope some of you can answer me.
- SIP UA A calls SIP UA B. The call is established
- Sometime later SIP UA B clicks on the ‘conference’ button and enters the DTMF digits 1234
- Asterisk intercepts these digits in a dial-plan
- Asterisk builds a SIP REFER message which includes custom ‘refer-to’ header set to 'email@example.com’ and sends the message back to SIP UA A within the same SIP dialog (between SIP UA A and Asterisk)
so, my question is how to build a SIP REFER message using Asterisk, can you tell me if that is possible, and if it is, how to do.