asterisk users - Mar 2005 - Asterisk support for SIP REFER message

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