I looked through several of those guides and they are for the most part the same. This provider does no authentication, it is all trusted IP. I made the changes to the router to redirect UDP port 5060 to the DSX. Configured the port settings for the SIP provider. Added my SIP lines with the proper provider selected. But still I cannot get any registrations. And the manual does not even reference the memory blocks involved. Seems not a lot of DSX and SIP info is out there.