After testing with the Cat5 wire connected stripe leads all together and the Cat5 only using the Blue and white leads The impeadance with all of them together got better RF noise dropped and DB levels got better. It wasnt as if someone put a load coil on the line. but more on that near the end.
The other problem that happened back in the late 70s is that some Telco companies like Ameritech used an extreemly small gauge wire from the pole to the home. It was never sheilded. IF you have that thin exsisting line the DSL would have a slower connection and a possible problem.
Some homes still have that and they see lower speeds. BUT When the Cat5 is twisted together solid to solid, stripe to stripe it added more copper to the line helping lower the problems.
If your home had a New line put in with the New wiring primarly blue / white more than likely you could get away with Cat3 twisted Or if your home still had some of that real old cloth covered wire it could be even better than the Cat5 or Cat3
The guide is in the prosess of being updated in the next month or so with all the added notes at the end on how to deal with the differances in the Impeadance levels Basically what to look for and what way to use the Cat5 line in.
All the test had been chked with a handheld and handheld scope along with a line meter. The guide is being updated for the second time with a DSL specialist from SBC. We used a combo of his equiptment along with mine.
We also ran a short test from the CO to the inside connection point...
At this point I cant give out location or any of the other info other than to say thousands have ran that homerun only a handful have said anything about a problem with it.
DB levels average at 28 stable when done right. If you want all the DB levels I can get them I just dont feal like pulling out the equiptment right now. I can even give the exact connection rate
Note: most the inside filters should probably Not be used outside..
Besides not all wiring is created equil as I and the boys from SBC have been finding out..
The best one to date Covad putting in a whole sets of trays all over the place that they forgot to wire.. OOOps did I say that.
Look, on paper what Kip is saying is true.
But DSL is still being tested in differant ways and differant levels to increase the levels to get better speeds over two wire. Just keep in mind I dont just know people in SBC but I know bean counters and VP's in R&D along with LAB mice. I knew them before there was DSL. Actually I knew some of them when there was still a manual switch board. I grew up with these people Now thats real scary..
Generally if speed drops its due to a leaky filter or mismatched wire in the home going back to the receivers(clicks and such white noise)
Also if you want a cheap peice of equiptment that can test your line quality for about $60 you can get a ZOOM router/bridge.
It isnt perfect and not nessassarly what I use for testing
But youll get all DB levels at a glance.
Plus your Connection Rate
Set VCI - VPI custom kbps rates
MAC and even "Gateways" through it..
ATM MTU and more.
Cheap yet effective when talking with a Tech support person..
Actually I do use it on ocassions when I need a quick read when I know the line is clean. Or a quick shot of a line when a tech is lieing to me. Like last week with Earlick.
Also something not mentioned speed can be a issue from things like leaky monitors, older computers with static run amuck 900Mhz and Ghz phone bases in the same room. Beleve it or not a toaster oven. A old laser printer bad or malfunctioning dimmer switch. bad line quality from the electric..
Anyway keep a open mind on DSL. Wait till you load balance two DSL lines and add wireless then it gets fun
Thanks
Dannjr
Peace:
Sorry dont know when I can make it back in this thread. Burried with work