[SR-Users] Record-Route Header Question

Hi, I am troubleshooting some strange call setup problems using an Edgewater Networks SBC. A couple of Polycom phones sit behind the SBC and they connect to a SIP Server in the cloud. The SBC is in passthrough mode. What I see that I am not sure about is: INVITE from SIP Server to SBC IP (no Record-Route header...so far no surprise here) INVITE from SBC to Phone (Record-Route header inserted by SBC but with the IP of the SIP Server) I do not think the SBC is supposed to add a Record-Route header with the IP of the remote SIP Server. I think It should only be allowed to add Record-Route headers with its own IP. Does that sound right? The RFC lists the usage as: "20.30 Record-Route The Record-Route header field is inserted by proxies in a request to force future requests in the dialog to be routed through the proxy." It says nothing about being able to arbitrarily force future requests to go through a remote IP. Please advise. Thanks, -- Technical Support