Upstream
am wondering why my lines’ upstream performance is so bad or good?
I has been like this for a couple of years
line a.1 560k - 570k
line a.3 440k - 450k
line a.4 450k - 500k
( line 4 was usually around the 500k mark, recently dropped by 45k suddenly which is unusual.)
a.1 and a.3 share the same drop cable, a.4 is on its own.
Line 1 is the mystery - why has it so good, it has always been 22-29% better than line 3 _and_ usually 10% better than line 4?
Line a.3 why so bad relatively- so much worse usually than line 4 and, leaving aside the recent blip, a lot worse than line a.4 which is usually around ~500k as opposed to line a.3’s constant 440k-450k.
I wonder what I can do to improve line a.3?