[Freeswitch-users] NAT-ed phone only got some incoming calls?

I have a customer with a natted Yealink T20P... Current reg: http://pastebin.freeswitch.org/19290 Two call traces, FS log side: http://pastebin.freeswitch.org/19286 One rang, one didn't. The local information for the phones is the same -- so NAT seems to be handled properly. Is this an issue with the remote router dropping packets or something...? I see 4 inbound calls to that device today, and 1 of them doesn't have a progress stamp so I assume that's the same as above -- it never got a 180 back. I think I can dig up the actual sip traces, if that matters, but it's not in the most convenient of formats. Some illumination would be appreciated. Thanks, -Avi Marcus