Hi. I've recently changed my router from a DIR-655 to the DIR-825 (because it blew up). Basically, the story is this - I use sipgate as my incoming phone number provider and, although my ata device tells me I'm connected, incoming callers are told I'm offline, checking website confirms this. I've tried forwarding the correct ports (the same as I did with the dir655 (no problems at all with that one) and even put the ata (spa3000) in the routers dmz.
If I reboot the ata then I can receive incoming calls, for a short time, before going 'offline' again. Any suggestions please? I'm beginning to regret not buying another dir655. As my area is heavily congested with 2.4 ghz wireless I was looking forward to using 5ghz as there are no other 5ghz users in range.