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Linphone Issues behind NAT firewall

I am attempting to connect a Linphone 3.7.0 soft client to a Cisco MSE 8710 bridge, but the session times out after 45-50 secs over the Internet and can take up to 10 min. on the corporate VPN (but video is never received).  I have configured the client as registered and unregistered to the VCS X7.2.  The TPS re-invites for DTLS negotiation (added in 3.x or higher of TPS) this is going to the wrong address, the private IP address. In older versions of TPS Cisco had  a bug where the Contact Header was not properly updating per RFC spec.  Cisco fixed that bug and now Linphone, no longer works correctly in my company's TP environment.  Is there a work-around for this issue?  If not, is this issue on Cisco's roadmap to be resolved in an upcoming version of TPS?

  • TelePresence