also are all these crc errors anything to worry about. Connection doesn't drop out that I've noticed:
with your attenuation I would be hoping for about 10mb. you have a lot of errors are you connected to the master or better the test socket.
have you tried the quiet line test dial 17070 option 2 should hear nothing and best with corded phone if cordless then dull hum normal
Don't think any of that will help tbh. The router is nowhere near any sources of interferance and all the cabling up to the master socket is outside on the wall and nowhere near anything electrical.
have you been having connection drops or have you been resetting the router just connection time is <24hrs
nope connection never drops. least not when I'm using it. Though the fact that it's less than 24hours seems it did or would it being in powersave mode cause that?