Just as a follow up these are the stats after a reboot of the modem this morning:
CRC : Down :38196 Up:58
The CRC errors seem to increase in large bursts. For example in 6-7 minutes went from 25412 to 38196.
I did a quite line test and I do ear some popping sound. Similar to popcorn when they almost finished popping...
BTW I have another line into my house that I use for work and that works with no issue, I can't remember last time I had to reboot the modem router. though the provider is not BT.
If it is a negotiation issue between the router ASUS RT-N66U and the modem and the TP-Link modem what should I do. I see no leading errors.