I use my VR2100v with an ONT. Internet is working just fine but I can't get my telephone working. I have all the correct settings from my provider (Cable4 in Germany) but it can't connect. I get the following error messages:

account[MYNUMBER(0)] registration failed and register fail, response code(408)

I have tried everything from every guide in these forums and online. The only thing I haven't tried (because I can't or don't know how) is configuring VLAN settings for telephony. It's not in the firmware. My provider recommends the VLAN tag 200 for telephony but when I try entering it into my internet setting it doesn't connect to the internet anymore (seems to have dofferent VLAN tags for internet and telephony). No idea where or if I can enter a separate VLAN tag just for telephony.