[Asterisk-Users] SIP Transfer problem

[Ariel's M-tech account]

I have been following and reading about the SIP problem of transferring calls with Asterisk.  I did not see this problem as having a fix or having a patch for it.  I can not use the # in our system due to IVR systems we access.    Can someone let me know at what stage this is at.  This is a major problem with our system in deploying SIP phones.  We have Cisco 7960, Snom 200 and IpDialog's working but can not transfer.    Thank you