Hi
I bought myself a 2m twisted pair shielded RJ11 modem lead from Tandy and was expecting big things as I only had the straight pair RJ11 modem lead supplied with my Billion 7800.
But when I changed the cable the sync was 200kbps lower than previously. I changed the cable at 1pm today so would have expected the same sort of sync but one good thing is the upstream attainable has increased.
Also what amount of Errored seconds per hour is acceptable, currently running at 20 on the downstream per hour although it did at one stage go up to 120es/h. Upstream is negligible.
Any ideas?
What you need to remember is the signal has traveled hundreds of metres in cheap telephone cable, why would adding 2 metres of premium cable at the end improve things?
The only time one of these more expensive cables will help is if you have a long run of many metres, even then any old cheap twisted pair will do (it doesn't need to be expensive), just avoid the flat telephone extension cable as because it isn't twisted any noise it picks up is harder to cancel out.
There are all sorts of things that go on with VDSL/ADSL, an improvement could see slightly worse errors simply because power output can be reduced due to an improvement and/or now receiving a fewer higher frequencies that by definition have more errors, but then over a few hours bit-swapping should sort those out.
Regards
Phil