rbdwarf
join:2007-01-21
Montreal, QC
| A Faq Question
Hey Rocky,
In Faq #2 you said:
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Q: How do I determine approximate distance?
A: You can only estimate it if you already have DSL as without it it's a guess. If you have DSL already, then add the two attenuation (up/down) together, then divide by 18.
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I'm guessing that this returns a value in KMs? When I do this I get a different number from what my modem tells me. A little more than double. In fact, at this distance (in KMs) I wouldn't be able to get the level of service I have. What am I missing?
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Rob |
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R0CKY
TSI Rocky
Premium,VIP
join:2005-05-19
Chatham, ON
1 edit | Post your details so that we can discuss.
PS - yes... it is in KMs...
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Rocky/TSIGUY - TekSavvy Solutions Inc. |
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rbdwarf
join:2007-01-21
Montreal, QC
| Hey Rocky,
I'm currently on a 5000/800 Fast profile. I get more errors than I'd like but the connection seems stable except when there are power issues (see other threads).
My attenuations are 69db up/50db down which yields a result of 6.61. My modem reports that I'm 10,000ft (3.048km) from my CO.
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Rob |
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R0CKY
TSI Rocky
Premium,VIP
join:2005-05-19
Chatham, ON
1 edit | Ok... so 10,000ft = 10,000 X 0.3048 /1,000 = 3.048KM...
This is the right math, however, I just pulled your stats and the attenuation is as follows from the bell side... 34dn/24up.
5056/800
84%/79%
6dB/13dB (noise)
20dBm/12dBm (power)
34dB/24dB (attenuation)
The attenuation maths out as follow based on this...
(34+24)/18 = 3.22KM which agrees with your modem's report.
The Noise on the down and the power has me a little concerned... Thinking this might be contributing to the stats differences... Maybe have a look at your wiring/termination/jack....
Rocky
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Rocky/TSIGUY - TekSavvy Solutions Inc. |
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rbdwarf
join:2007-01-21
Montreal, QC
| said by R0CKY  :I just pulled your stats and the attenuation is as follows from the bell side... 34dn/24up. 5056/800 84%/79% 6dB/13dB (noise) 20dBm/12dBm (power) 34dB/24dB (attenuation)
Interesting that the noise is almost exactly the same as reported by my modem (7/14) but the attenuation is so far off. My modem software doesn't give me anything for output power so I can't compare that.
said by R0CKY :The Noise on the down and the power has me a little concerned... Thinking this might be contributing to the stats differences... Maybe have a look at your wiring/termination/jack....
The last time I connected straight to the demarc it made no difference, but I was concerned mostly with the modem dropping synch. I'll try it again and watch the other stats (I can't watch the power stat).
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Rob |
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rbdwarf
join:2007-01-21
Montreal, QC
| Ok Rocky, I'm plugged straight into the demarc. From my side it looks almost exactly the same (my upstream attenuation went down by 1). Can you pull the bell stats and see if there's any difference there? I'm curious about the power stats.
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Rob |
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R0CKY
TSI Rocky
Premium,VIP
join:2005-05-19
Chatham, ON | Well after fiddling with a few things the stats remain the same... .I guess, so long as your connection is consistent, that's all that matter!
Rocky
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Rocky/TSIGUY - TekSavvy Solutions Inc. |
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