 TCS
@frontiernet.net | [DSL] Low SNR Just curious if anyone can give me some insight. Currently looking at my modem stats, and on my downstream path, I've got a Margin/SNR of 8.6 which I know is fairly bad, however my ATTN is at 29.8. Based on my ATTN, I should be able to get 10mbit+... so my question is, what may be a cause of the horrible SNR? And is it something I can control/fix?
I know that the installer had no idea how the previous guy had wired the phone lines in the house (there was previously a security system), so he stuck two modems on one line coming in from the outside.
I'm just dying with these horribly slow speeds (currently around 4mb), and ridiculous prices. |
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TCS
@frontiernet.net | Well, I've narrowed it down. Signal at the box was excellent so I knew it had to be inside wiring. I've got the two modem package, and the installer put both modems on their own pair, but coming in on one 4-conductor cable. With both modems plugged in, it appears that the crosstalk is killing the SNR. There is a second line run into the house that I've found, so I'm going to try moving one of the modems to that. |
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| Using the same station wire should be no problem as long as it has a twist. Cat 5 is just wire with an extreme twist. Some older station wire and what was used by many ignorant builders have no twist at all. This will not work well for two dsl circuits or even 2 dial tone lines. Bonded is run on the same station wire but should be cat 5. |
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TCS
@frontiernet.net | There were no twists in the wire, so your assumptions about the builder using shitty cable are likely spot on. I found the second wire coming into the house, and put the second modem on that. 24 SNR for both (not sure what kind of drop I should be seeing from outside to inside, but I saw about a 5).
Now I just need to figure out how I can get in touch with someone clued at frontier to work with me on bumping the speeds up. Any chance there's techs on the forum who work for them, or am I stuck trying to get through the tech support gauntlet? |
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| 5 db is a lot of loss from the nid to the jack with a non bridge tapped station wire. Should be no more than 1 db if any at all. |
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| Good to know, I figured as much. I guess I'll live with it for now and plan on running a new line at some point in the future if the current lines pose a problem with me getting max speeds. Getting a new line from the outside to my utility room where they currently terminate seems like it would be basically impossible. |
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