[Asterisk-Users] Asterisk support for SIP REFER message

[Gilbert Abboud]

Hi 

I need to know if Asterisk supports the full features of the SIP REFER message (i.e blind and supervised transfers). 

I'm trying to do a supervised transfer through Asterisk from a VoiceXML application using the <transfer> tag and setting bridge="true" (i.e <transfer name="transfer1" bridge="true" connecttimeout="10s"> ) but as soon as Asterisk receives the SIP REFER message generated by the VoiceXML application, it sends back a NOTIFY message with a "subscription-state:terminated" as if it was a blind transfer (bridge="false") which instructs the VoiceXML application to disconnect so it no longer supervises the call to get back the result ( callee unavailable, busy,...) . 
Usually, when the brige="true" is set in the VoiceXML application, the end point that receives the SIP REFER should send a NOTIFY message with "subscription-state:active"  and then it should send back NOTIFY messages to tell the VoiceXML application about the result of the call (i.e callee unavailable, busy,...).

Regards,

Gilbert Abboud
M.Eng. Computer Engineering
Programmer Analyst
Excendia, Montreal
ESN: 514-765-8490