[OpenSER-Users] OpenSER+Asterisk: Attended Transfer, Call pickup

Hello, I am configuring a platform unig OpenSER 1.2 with Asterisk 1.2. I have all the SIP phones registered on OpenSER. I use the realtime setup on Asterisk using a view on MySQL.

I need to be able to process the attended transfer between two UAC registered on OpenSER, having the first received a call from the Asterisk side, so that the second UAC gets the call transferred.

I also need to do this as a blind transfer.

But, I don't want to use the Asterisk dtmf features, I want to use the SIP INVITE/REFER features from the UAC (actually polycom and snom phones).

Can someboy shed me some light on this?

I need to evaluate if this is possible, or if it needs lots of sources modifications.

Thank you very much.