| Stephen Gran on 12 Oct 2006 23:28:07 -0000 |
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On Thu, Oct 12, 2006 at 04:47:13PM -0400, Jeff Abrahamson said: > Can anyone explain what is meant by "testing the stress on a line" > when uttered by a DSL tech support person? The measure of stress is > dB. This is a measure of the quality of internal wiring. They are looking at "line loss"; roughly how much is being leaked by the copper on the way from the telco to your adsl modem. http://usertools.plus.net/tutorials/id/12 has some entry level details - I'm sure you can figure out the important bits behind it :) > Related, I have a DSL circuit that runs at least partly over CAT-3 or > CAT-4 (!) instead of over standard twisted pair. I don't think it > should matter, but is anyone here aware of specs that should advise > against this? I'd rather not run new wires, but I'm trying to trace > down a minor problem. Cat 3 & 4 is orders of magnitude (I think) faster than what you're getting from the telco, so I don't think this should be related, unless something is shorted or you have poor shielding or some other bizarre problem resulting in massive loss over the relatively short link I would imagine you have. My first uninformed total guess is that the West Philly overhead wires are falling apart (again). -- -------------------------------------------------------------------------- | Stephen Gran | Why is it that we rejoice at a birth | | steve@lobefin.net | and grieve at a funeral? It is because | | http://www.lobefin.net/~steve | we are not the person involved. -- | | | Mark Twain, "Pudd'nhead Wilson's | | | Calendar" | -------------------------------------------------------------------------- Attachment:
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