cubguy
join:2010-07-09
Greenwood Springs, MS | [Availability] Potential Speeds with these stats We are one of those AT&T customers who are right on the cusp as far as distance goes between two speeds. We currently have 1.5/384 and would love to have 3.0/384. On the few occasions I have had work done on the line and AT&T has unlocked the card for testing, we were able to achieve speeds of approx 3.08M. I have included our current modem stats and would like to know opinions of what, based on your experiences you think that our line would support. We have a "Whole Home" splitter setup in the NID so the line is free from the voice line.
Current Noise Margin: 18.0 dB (Downstream) 22.0 dB (Upstream)
Current Attenuation: 52.9 dB (Downstream) 29.5 dB (Upstream)
Current Output Power: 16.9 dBm (Downstream) 9.9 dBm (Upstream) |
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| said by cubguy:Current Noise Margin: 18.0 dB (Downstream) 22.0 dB (Upstream)
Current Attenuation: 52.9 dB (Downstream) 29.5 dB (Upstream)
Current Output Power: 16.9 dBm (Downstream) 9.9 dBm (Upstream)
Noise Margin is ok...but not great...
»AT&T Southeast Forum FAQ »How do I check modem stats & event logs? What do the numbers mean?
Attenuation is telling you that going for 3.0 will be futile...
»AT&T Southeast Forum FAQ »How to check modem stats, synch rates & speeds from test jack at the NID.
can you post pics of your whole house splitter inside the NID? and maybe how your dsl modem is connected.... |
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public
join:2002-01-19
Santa Clara, CA | reply to cubguy
said by cubguy:Current Noise Margin: 18.0 dB (Downstream) 22.0 dB (Upstream)
Current Attenuation: 52.9 dB (Downstream) 29.5 dB (Upstream)
Current Output Power: 16.9 dBm (Downstream) 9.9 dBm (Upstream)
These definitely look good enough for 3008/512 service.
Try a modem like the ss4100 which shows the bit bin loading, and gives you max rate estimate. |
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| said by public:said by cubguy:Current Noise Margin: 18.0 dB (Downstream) 22.0 dB (Upstream)
Current Attenuation: 52.9 dB (Downstream) 29.5 dB (Upstream)
Current Output Power: 16.9 dBm (Downstream) 9.9 dBm (Upstream)
These definitely look good enough for 3008/512 service. Try a modem like the ss4100 which shows the bit bin loading, and gives you max rate estimate. look good enough?
his noise margin of 18.0 is ok like I said but not great...
*6dB or below is bad and will experience no synch or intermittent synch problems
*7dB-10dB is fair but does not leave much room for variances in conditions
*11dB-20dB is good with no synch problems
*20dB-28dB is excellent
*29dB or above is outstanding
then the Attenuation which is the measure of how much the signal has degraded between the DSLAM and the modem, shows 52.9 that is poor and may experience connectivity issues
*20dB and below is outstanding
*20dB-30dB is excellent
*30dB-40dB is very good
*40dB-50dB is good
*50dB-60dB is poor and may experience connectivity issues
*60dB or above is bad and will experience connectivity issues
all according to this...»AT&T Southeast Forum FAQ »How do I check modem stats & event logs? What do the numbers mean?
and based on what I have seen here in the Midsouth...which the OP is located also....
the signals might be fine for you over there but definitely not here...
and recommending a mediocre SS4100 modem? I'd rather go with a 3347 here. |
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cubguy
join:2010-07-09
Greenwood Springs, MS | I am afraid to say I am still using my 2701HG-B. I had a commercial router before that, but didn't use it long. I think it gave more realtime stats.
Now for the facts "out here"...We have a line length just above 18,000 feet, so I am sure that accounts for the 52.9db. We don't have alot of sync issues here maybe once twice a week for a few seconds, which I usually write off with them working on the line down the road. I know the location of our DSLAM, and am so hoping that they might either up the output power just a nudge, or put a supplimental boost RT closer to reduce the distance. We are the next to the last home on the NPA-NXX line.
What upsets me more is there is a brand spanking new DSLAM (Looks like it might even be a VRAD) about a mile closer to my home, unfortunately, its on the other NPA-NXX. I don't know if the lines interconnect out here, but if they do, you would certainly think it would be do-able at an approx Distance of 13000ft.
Thoughts?
Thoughts |
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public
join:2002-01-19
Santa Clara, CA | reply to medbuyer
said by medbuyer:and based on what I have seen here in the Midsouth...which the OP is located also....
the signals might be fine for you over there but definitely not here...
and recommending a mediocre SS4100 modem? I'd rather go with a 3347 here.
You will not see snr over 20dB because the dslam will reduce tx power.
Sadly the 3347-02 does not show tone bins. |
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public
join:2002-01-19
Santa Clara, CA | reply to cubguy
said by cubguy:Now for the facts "out here"...We have a line length just above 18,000 feet, so I am sure that accounts for the 52.9db. Not possible unless the line uses #18 or heavier wire.
If you want a 3347 modem, I have extra. |
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| reply to public
said by public:You will not see snr over 20dB because the dslam will reduce tx power.
Sadly the 3347-02 does not show tone bins.
if the OP goes back to 1.5, he will see that snr go back to its acceptable levels...
DSL has distance limitations. stretching that signal to something you want but in reality will not give you a stable signal and will only create headaches for you and will really degrade those rate stats.
the dslam has reduced that snr greatly as an indication that it cannot support his 3.0 speeds.
when I had 3.0, I had excellent stats and when I tried to get 6.0, stats went below normal, with me testing different modems but ended up using a 3347 and went back to 3.0
tone bins or not, ATT still the one providing the signals that the modem is reading / interpreting. it's not like the modem is amplifying the signals so he can get a better connection... |
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public
join:2002-01-19
Santa Clara, CA | said by medbuyer:tone bins or not, ATT still the one providing the signals that the modem is reading / interpreting. it's not like the modem is amplifying the signals so he can get a better connection...
Tone bins will show if the speed is limited by attenuation, or by a possibly removable interference. |
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| said by public:said by medbuyer:tone bins or not, ATT still the one providing the signals that the modem is reading / interpreting. it's not like the modem is amplifying the signals so he can get a better connection...
Tone bins will show if the speed is limited by attenuation, or by a possibly removable interference. duhhh......the stats for attenuation already showed that....didn't you read the stats he posted and or faq's in the links I posted or you just missed that part?
like I said, the signals / stats alone already paint a story behind a connection, either good or bad...which in the end, ATT still has control...
besides, non tech savvy people can read / interpret stats / signals easier than tone bins... |
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