I have noticed that SIP device call processing changed dramaticaly in V9. So Polycom is not working any more as it use to work. Transfer is working fine, but it disconnects Polycom and it is not possible to use a feature code for conferencing. As a work around we create conference from a deskphone, join polycom and then hang up. We have deployed lots of polycoms which worked just perfect in V.8 and now stopped. Any ideas?