I contacted the German Support and they were nice and tried to help with "basic tryouts". From reseting, over changing DNS to google-servers and so on. But nothing helped. Then they stopped replying....

Hello, i have the TD-W8970B and i have the same problem. ADSL2+ (Annex J) with VLAN 7 -> LAN Ports are not able to access Internet, but Router it self is accessable. I tried serval things, but...