I was getting a lot of T3 errors but appear to have fixed this by tightening up the connector on the incoming VM cable. I also improved my 2.4 wifi by manually changing the channel as my neighbours are using 1,3,4 and 5.
While checking the router (Shub 2) I noticed that the Downstreem power levels have a spread of about 5 to 8dB. Is this normal?
Whilst it's not normal for reasons I'll explain, in your case it's harmless.
The amplifier in the street cabinet should be "sloped" (google that) so that the higher frequencies and the lower frequencies have approximately the same power levels. As you may know/learn, the higher frequencies attenuate signal over distance more than the lower frequencies and this is obvious from your downstream power levels.
VNM should really fix this because it is not in their standard specs.
Thanks for the link to your primer, looks like my levels are not `ideal` but should be okay. I have cleared the pre and post error logs and will see how things go with the tightened connection. Thanks again for your advice.