[asterisk-users] Blind transfer behavior - Asterisk 1.8 and 10

[Administrator TOOTAI]

Hi,

I want to check the status of a blind transfer (only sip endpoint) 
between various phones. Transfer is working perfectly, using ## from 
features.conf or using transfer key from phone, here SNOM320.

My problem is that if party to transfer to is busy, the transfer fail 
and the call is ended. What I want to do is to return the call to the 
party who originate the transfer.

I checked variable like ${BLINDTRANSFER} ${TRANSFERED_BY} or 
${TRANSFER_CONTEXT}, they are all empty. What did I miss?

Thanks for any hints

-- 
Daniel