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tenpin784
I Went To The Dark Side?

join:2001-03-30
Brierfield, AL

TV Breaking Up

Our TV has been breaking up pretty bad, and I think it has to do with our signal.

I am new to DSL/Uverse technology (extensive cable background), so I am not sure if these signal levels are good or not. The one thing I am worried about is the number of FEC errors:

DSL Status
 Line 1Line 2
Line State Up Up
Downstream Sync Rate (kbps) 12919 12286
Upstream Sync Rate (kbps) 879 1019
Downstream Max Attainable Rate (kbps) 14740 23500
Upstream Max Attainable Rate (kbps) 969 1331
Modulation VDSL2 VDSL2
Data Path Interleaved Interleaved
  Downstream Upstream Downstream Upstream
SN Margin (dB) 10.3 5.6 18.6 14.2
Line Attenuation (dB) 31.2 44.5 32.6 51.1
Output Power(dBm) 14.5 10.5 14.0 10.4
Errored Seconds 1 16 0 0
Loss of Signal 0 0 0 0
Loss of Frame 0 0 0 0
FEC Errors 27107 869 26408 0
CRC Errors 3 83 0 0
 

Looks like I may be in trouble? I don't know how far from the VRAD I am, but I am the last house on the line.

Thoughts on how I could get better signal?

Sorry for the incompetence when it comes to DSL technology.

--
Dream as if you'll live forever, live as if you'll die today.

Disclaimer: These are MY comments, my employer cant be held responsible.


PrimeTime21

@above.net

I cant help diagnose the problem but if you have Windows XP or Windows 7 you may find this app useful. It was written by someone that works for the Uverse team and it gives you a wide variety of information, including how far you are from the VRAD.

»www.uvrealtime.com/

I know I have had issues before with pixelation and it may be a line issue.



tenpin784
I Went To The Dark Side?

join:2001-03-30
Brierfield, AL

I heard that it doesn't work for the NVG589.



rolande
Certifiable
Premium,Mod
join:2002-05-24
Dallas, TX
kudos:6
Reviews:
·AT&T U-Verse
·ViaTalk
reply to tenpin784

You are on a pair bonded connection. Your first line has terrible SN margin for both downstream and upstream. However, those FEC counts are not that high. You have a few CRCs which are worse than FECs. Other than the marginal signal strength on line 1, nothing else in the data provided looks obvious.

The only suggestion I'd make is looking into getting line 1 tested and conditioned if possible to improve the signal. The sync rate is at almost 88% of max rate. With the low SN margin, that is ripe for issues. I assume you are on an iNID. If you call for repair the tech should swap out your iNID for an NVG589 which by itself could improve the signal properties. If they condition the copper and/or move you to a K card in the VRAD that should help tremendously.
--
Scott, CCIE #14618 Routing & Switching
»rolande.wordpress.com/


OP is already on 589 RG
Agree issue is line 1, not only low SN ratio but also max sync rate is 9M less, if both lines are about same distance suspect bridge tap. Call ask for service tech, needs to run SELT test, should show issue to get CIM ticket created and dispatched. Note: this is not a problem uverse tech can generally solve needs outside lineman.



tenpin784
I Went To The Dark Side?

join:2001-03-30
Brierfield, AL

1 edit
reply to tenpin784

I already have an NVG589.

Here are my stats now, not sure what has changed:

DSL Status
 Line 1Line 2
Line State Up Up
Downstream Sync Rate (kbps) 12919 12286
Upstream Sync Rate (kbps) 879 1019
Downstream Max Attainable Rate (kbps) 23332 23548
Upstream Max Attainable Rate (kbps) 1164 1331
Modulation VDSL2 VDSL2
Data Path Interleaved Interleaved
  Downstream Upstream Downstream Upstream
SN Margin (dB) 19.3 12.7 18.6 14.2
Line Attenuation (dB) 31.2 44.5 32.6 51.1
Output Power(dBm) 14.5 10.5 14.0 10.4
Errored Seconds 274 124 466 45
Loss of Signal 0 0 0 0
Loss of Frame 0 0 0 0
FEC Errors 21321293 18526 3002590 4260
CRC Errors 1508 512 2673 87
 

Edit: I am graphing my NVG589 in Cacti so I can see the fluctuations. Can't recall if there were weather problems or not when I first posted this. One problem I did notice though is, 2 seconds after lightning would flash during a storm (not even close), my TV would break up. Maybe by graphing the FEC/CRC errors, I can figure out if both pairs are acting up, or just one.
--
Dream as if you'll live forever, live as if you'll die today.



Disclaimer: These are MY comments, my employer cant be held responsible.


tenpin784
I Went To The Dark Side?

join:2001-03-30
Brierfield, AL
reply to tenpin784

Click for full size
Downstream Stats
Click for full size
Upstream Stats
Coming back to this, there is something seriously wrong with my Line1. Looks like I will have to call em.


Msradell
P.E.
Premium
join:2008-12-25
Louisville, KY

What software did you used to create those graphs? I know that UV Realtime will not work with the NVG 589 which I also have.



tenpin784
I Went To The Dark Side?

join:2001-03-30
Brierfield, AL

I am using Cacti, and it is polling the webpage and parsing out the values using a script I wrote.



rolande
Certifiable
Premium,Mod
join:2002-05-24
Dallas, TX
kudos:6
Reviews:
·AT&T U-Verse
·ViaTalk

I did the same thing with RRD for a long time when I had the old AT&T ADSL in Chicago and Columbus running on a Cisco router. I used rshell to grab the interface stats output and parsed it with awk. You should graph the SN margin down and up for both pairs and attenuation. That would be more helpful in diagnosing the problem.
--
Scott, CCIE #14618 Routing & Switching
»rolande.wordpress.com/



tenpin784
I Went To The Dark Side?

join:2001-03-30
Brierfield, AL

1 edit

That is one graph out of two I haven't figured out how to get going yet, because of the output of the page.

I have:

CRC Errors
FEC Errors
Downstream Speeds
Upstream Speeds
Down/Up Output Power

I am missing:

SN Margin
Line Attenuation

Differences:

SN Margin (no workie)

                       <tr class="a"><td class="col1">SN Margin (dB)</td>
                           <td class="col2">
 25.1
</td>
                           <td class="col2">
 21.9
</td>
                           <td class="col2">
 12.4
</td>
                           <td class="col2">
 9.2
</td>
                       </tr>
 

Output Power (works):

                       <tr class="a"><td class="col1">Output Power(dBm)</td>
                           <td class="col2"> 14.5</td>
                           <td class="col2"> 10.5</td>
                           <td class="col2"> 14.5</td>
                           <td class="col2"> 10.4</td>
                       </tr>
 
--
Dream as if you'll live forever, live as if you'll die today.



Disclaimer: These are MY comments, my employer cant be held responsible.