[Freeswitch-users] Can I get SIP DID working?

I have used Freeswitch with a DID from Voxbone working on IAX, and that have been working so well. But now Voxbone will discontinue the IAX service, so I have to get DID working on SIP, and I am wondering if that will work at all in my configuration. Freeswitch is behind nat, so when I get a call from Voxbone, see http://pastebin.freeswitch.org/4629 , it will come in on port 5060. Have you covered this situation in the documentation? Ivan