I've been using this SPA112 adapter on ADSL2 for some time but since moving to a place with VDSL it's dropped registration several times a day. The web interface remains operational and its claims to be Registered but has no time remaining until next registration. 2Talk shows it to be not registered. A reboot does the trick for a while.I've tried several things to improve matters including a factory reset and re-provisoning the SPA as well as manually entering the parameters. 2Talk unhelpfully suggested try another router/internet connection.I upgraded to the latest firmware on both the SPA 1.4.1 and Fritzbox 6.80 and also removed the SNR tweak from my Fritz!Box 7490 (http://www.geekzone.co.nz/forums.asp?topicid=105744) as there were periodically very high error rates on the link. This latter had never been a problem on ADSL and had given a 20%+ speed boost. The Fritz!Box now reports 0.09 CRC errors per minute.I've been unable to get the ATA in the Fritz!Box to run reliably with two way sound.Finally this thread gave me a possible workaround http://www.geekzone.co.nz/forums.asp?forumid=43&topicid=136518 and since changing to UDP the SPA has been solid. I can't explain it but it does seem to be a real thing.
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