I am having an issue with attended transfers failing, it seems that the server is trying to send the invite after the REFER to itself.  Almost as if it is resolving the registration/location domain (a.domain1.com in this case) and sending the invite to that IP. SIP trace available here: http://pastebin.com/dyvYpZNc I have googled this and found several others having this issue in the past but no resolution was posted afterwards.  Please help.  :)