Corrected blocks going through the roof! in AT&T U-verse http://www.dslreports.com/forum/r23292436 en Wed, 10 Feb 2010 09:07:51 EDT Wed, 10 Feb 2010 09:07:51 EDT Re: Corrected blocks going through the roof! http://www.dslreports.com/forum/remark,23392336 doublea :
said by systech See Profile :

On some Uverse lines the ground noise is pretty constant meaning you can watch the stats and see them climb continuously. On others they will only increment intermittently. Every line is different, because your home power is part of the equation. Solid state dimmers, touch lamps, some CRTs and some other devices can cause a differential mode noise ground loop that feeds back to the RG either in the power, or from STB via COAX or ethernet. As far as the grounding issue on you line is concerned you may or may not have a grounding issue. Unfortunately cable grounding issues has become a catch-all to explain chronic problems. The 2wire RG and the VRAD work together to give tech support quite a lot of graphs of bits-per-tone, insertion loss, interfering frequencies, and more. The only problem is all of the information that can be acquired from the 2Wire is still not as accurate as a stand alone test set in the field, because the RG is using A/C power from the home and can thus be influenced to see something that may not be coming from the line, but from power.
If your line has "grounding issues" it basically means the sheath of the telephone cable is not connected adequately to a good ground source in one or multiple locations. If this is the case, then the cable will exhibit poor noise repulsion and will thus allow some "impulse noise" or "wide band noise" to get into the cable and interfere with the actual signal.
They have done more than test it through the RG, Ive seen them plug more testing devices into my line than I could imagine. Ive had techs looking at my line at least 5 times.

Thanks for the detailed reply, always enjoy a good explanation of how the heck all this stuff works. ]]> http://www.dslreports.com/forum/remark,23392336 Wed, 25 Nov 2009 00:18:33 EDT Re: Corrected blocks going through the roof! http://www.dslreports.com/forum/remark,23392163 systech : On some Uverse lines the ground noise is pretty constant meaning you can watch the stats and see them climb continuously. On others they will only increment intermittently. Every line is different, because your home power is part of the equation. Solid state dimmers, touch lamps, some CRTs and some other devices can cause a differential mode noise ground loop that feeds back to the RG either in the power, or from STB via COAX or ethernet. As far as the grounding issue on you line is concerned you may or may not have a grounding issue. Unfortunately cable grounding issues has become a catch-all to explain chronic problems. The 2wire RG and the VRAD work together to give tech support quite a lot of graphs of bits-per-tone, insertion loss, interfering frequencies, and more. The only problem is all of the information that can be acquired from the 2Wire is still not as accurate as a stand alone test set in the field, because the RG is using A/C power from the home and can thus be influenced to see something that may not be coming from the line, but from power.
If your line has "grounding issues" it basically means the sheath of the telephone cable is not connected adequately to a good ground source in one or multiple locations. If this is the case, then the cable will exhibit poor noise repulsion and will thus allow some "impulse noise" or "wide band noise" to get into the cable and interfere with the actual signal.
--
Americans don't care how much something costs, as long as they don't have to pay for it all at once.]]> http://www.dslreports.com/forum/remark,23392163 Tue, 24 Nov 2009 23:23:05 EDT Re: Corrected blocks going through the roof! http://www.dslreports.com/forum/remark,23381357 doublea :
said by systech See Profile :

If indeed the outside line is good and RG is still showing mega corrected blocks there could be something else at work. We have encountered this a lot in the field. We have come to learn that the RGs are very sensitive to common mode and differential mode noise on the power line. There have been many cases where our test sets sync to perfect lines running well over max rates of 50Mbps while the RG will not sync at all or when they did the sync rate was terrible and running massive errors. Sometimes floating the ground breaks the ground noise loop and essentially fixes the issue. Other times we can install one of our new isolation transformers in line with either the RJ-11 phn cord or Coax depending on how the unit is fed. Either way you can isolate the issue by running the RG off of a battery while watching your diagnostics page. We have battery backups we use for this, but a regular 12V battery works just fine.
This still does not explain the problem of when I reboot the RG all the errors, go away.... for a few days...

On the flip side, care to elaborate on the "ground" all the techs that came to my house said my line has a grounding issue, but im pretty much clueless on to what that means is up, and how they can fix that other than tearing my road up :P

Thanks for the reply. ]]> http://www.dslreports.com/forum/remark,23381357 Sun, 22 Nov 2009 23:19:31 EDT Re: Corrected blocks going through the roof! http://www.dslreports.com/forum/remark,23380944 Keoway : Here's my stats for 9 days 21:13:13, but reflect being away for 6 of the nearly 10 day period.

Cumulative Seconds w/Errors: 185 20 0 1:26:06
Corrected Blocks: 4,502,961 495,512 518 0:00:30
Uncorrectable Blocks: 442 61 0 1:26:06

When returning, I checked the stats and the cumulative corrected blocks count was circa 3,500,000. [Note: When away, I did use the iTouch applet to add/delete 3 DVR record events.]

When I have time to monitor the stats, I want to experiment with reintroducing the CFL back into the same circuit with the RG and observe whether a causality seems apparent.

Here's the Link stats to correlate with the error stats:
DSL Down Up
Current Rate: 25216 kbs 2048 kbs
Max Rate: 54496 kbs Not Available
Current Connection:
Current Noise Margin: 22.0 dB Not Available
Current Attenuation: 25.6 dB Not Available
Current Output Power: 13.6 dBm -7.3 dBm
IP Bytes Packets Errors %
Transmit: 508928136 2159643 0 0
Receive: 79480972935 59836200 7 0]]> http://www.dslreports.com/forum/remark,23380944 Sun, 22 Nov 2009 21:44:39 EDT Re: Corrected blocks going through the roof! http://www.dslreports.com/forum/remark,23380737 systech : If indeed the outside line is good and RG is still showing mega corrected blocks there could be something else at work. We have encountered this a lot in the field. We have come to learn that the RGs are very sensitive to common mode and differential mode noise on the power line. There have been many cases where our test sets sync to perfect lines running well over max rates of 50Mbps while the RG will not sync at all or when they did the sync rate was terrible and running massive errors. Sometimes floating the ground breaks the ground noise loop and essentially fixes the issue. Other times we can install one of our new isolation transformers in line with either the RJ-11 phn cord or Coax depending on how the unit is fed. Either way you can isolate the issue by running the RG off of a battery while watching your diagnostics page. We have battery backups we use for this, but a regular 12V battery works just fine.
--
Americans don't care how much something costs, as long as they don't have to pay for it all at once.]]> http://www.dslreports.com/forum/remark,23380737 Sun, 22 Nov 2009 20:59:45 EDT Re: Corrected blocks going through the roof! http://www.dslreports.com/forum/remark,23334909 doublea : It's interesting to read through all of these pages about corrected and uncorrected blocks. As some of you may have read through my story with corrected and uncorrected blocks, I had Matt help me, we ended up having our entire walkway torn up, and the techs looking for our line.... We had a guy check all of the connections of our line all the way to the vrad, and "clean" the line. We had crews out here several times. I have on average 4 billion corrected blocks in a day, and 1 million uncorrected.

Now I don't really notice a performance drop other than getting a page cant be displayed messages a few times a day. Ive fully gotten used to it.... why?

It turns out the crews wanted to tear up the road in front of my house. Normally this wouldn't be a problem, but this is a townhouse development. Just last year we put a few hundred thousand into redoing all of our roads perfectly (cost was split 72 ways, but still it was expensive), we don't want any patchwork on our new pavement. Or at least my neighbors don't, and I don't blame them. I never personally told AT&T to stop working on my problem, but I watched several of my neighbors yell the AT&T crews about the marking on the pavement, (markings prepping the areas to be jack hammered up. )

I'm glad to hear this possibly has something to do with the RG itself, My uncorrected, and corrected also stay very very low several days after a reboot, maybe 50 in 10 hours, with 0 uncorrected. So a RG reboot helps me too. So I admit, their is probably something with my line also, but I hope that a software update could at least fix some of the problem.

I'm also not willing to try get more help in fixing this, because I'm scared that AT&T will put me on a lower profile and call it fixed. I will live with my issues rather a slower speed.

Matt was very helpful, but my situation kinda left me in a place were what I have can't be fixed.

And no I don't want Comcast, they do have docsis3 here, but they cap, and we have a nasty taste left in our mouth left from a issue a few years ago with them. I'm still MUCH MUCH more happy with AT&T in general.

So short of tearing up my road, or lowering my speed, or a magical software patch for the RG, I continue to ignore my problems :P.

The attached image is from tonight.
Click for full size
]]> http://www.dslreports.com/forum/remark,23334909 Fri, 13 Nov 2009 02:30:14 EDT Re: Corrected blocks going through the roof! http://www.dslreports.com/forum/remark,23328479 anon : Corrected Blocked are not a bad thing. Uncorrected blocks are. When corrected blocks happens, and it works. That means the equipment is doing its job.

Unless this is service impacting, do not worry about it.

Generally when it is service impacting, there is another issue that aggravates this. Usually, though, it is not.]]> http://www.dslreports.com/forum/remark,23328479 Wed, 11 Nov 2009 22:24:08 EDT Re: Corrected blocks going through the roof! http://www.dslreports.com/forum/remark,23318912 bsnelson : As another poster suggested, I rebooted my RG last night, and have only had 2,781 corrected blocks in the almost 10 hours since. I was getting that many per SECOND before.

I'm thinking bug in the statistics gathering code at this point.

Brad]]> http://www.dslreports.com/forum/remark,23318912 Tue, 10 Nov 2009 08:45:41 EDT Re: Corrected blocks going through the roof! http://www.dslreports.com/forum/remark,23315382 Tanshin : This is just so interesting. I really am astounded by some of these things!]]> http://www.dslreports.com/forum/remark,23315382 Mon, 09 Nov 2009 15:13:46 EDT Re: Corrected blocks going through the roof! http://www.dslreports.com/forum/remark,23312471 Keoway : Here's 28 hours of stats, after relocation of the CFL to a different, grounded, circuit:

Cumulative Seconds w/Errors: 166 85 0 1:22:53
Corrected Blocks: 777532 304297 75 0:01:03
Uncorrectable Blocks: 273 136 0 1:22:53

I like the way these numbers look! This U-Verse diagnostic voyage has also made me reflect upon what had become a huge annoyance with my home network.

Prior to switching to U-Verse, I had FastAccess for more than 8 years. I ran the original Alcatel STH modem the entire time with initially a D-Link 802.11b AP and later a Netgear 802.11g AP.

For several months, I had started to experience lots of "drops" from the Netgear box. I was starting to question its health and/or that of my laptop's wireless radio. I also wondered about "noise" from all of the other SSID's that wonder around the neighborhood.

The "drops" always seemed to be minimal when I was on battery power. When on AC power, the incident rate usually seemed to climb. The laptop charger, CFL/lamp, HP printer, and shredder all resided on the same Belkin power strip.

I may have wasted lots of time and got really disgusted by the earlier problem ... when the solution was real simple --- Unlpug the lamp! (The CFL in question is a 6500K 23W bulb.)

Nota Bene: Individual mileage may vary. Objects in mirror are closer than they appear ... ]]> http://www.dslreports.com/forum/remark,23312471 Sun, 08 Nov 2009 23:05:38 EDT Re: Corrected blocks going through the roof! http://www.dslreports.com/forum/remark,23311189 bsnelson : So I guess these numbers are a little on the high side?

Collected for 0:47:53
DSL Since Reset Current 24-Hour Interval Current 15-Minute Interval Time Since
Last Event
Link Retrains: 0 0 0 0:00:00
DSL Training Errors: 0 0 0 0:00:00
Training Timeouts: 0 0 0 0:00:00
Loss of Framing Failures: 0 0 0 0:00:00
Loss of Signal Failures: 0 0 0 0:00:00
Loss of Margin Failures: 0 0 0 0:00:00
Cumulative Seconds w/Errors: 1 1 0 0:06:53
Cumulative Sec. w/Severe Errors: 0 0 0 0:00:00
Corrected Blocks: 24785791 24785791 1500952 0:00:00
Uncorrectable Blocks: 2 2 0 0:06:53
DSL Unavailable Seconds: 0 0 0 0:00:00

Almost 25 million corrected blocks in a little over 45 minutes? Few uncorrected, though. I'm not seeing any obvious performance problems, but I'm an internet-only customer and am not really pegging the link by any means.

Is this something I should be concerned about? I'm still on the "old" software and I haven't rebooted the RG in probably a month or more (although I obviously reset the statistics for this snapshot).

Brad]]> http://www.dslreports.com/forum/remark,23311189 Sun, 08 Nov 2009 17:52:47 EDT Re: Corrected blocks going through the roof! http://www.dslreports.com/forum/remark,23309633 Keoway : Time to start a new day. Here's the numbers from early this morning:

Cumulative Seconds w/Errors: 48 48 0 0:40:56
Corrected Blocks: 285423 285423 836 0:01:50
Uncorrectable Blocks: 94 94 0 0:40:56

I booted the laptop, before touching anything else that needed power and checked the stats. Corrected block count had been 0 for 35 minutes, but then I turned on the CFL. Just turning it on ... the count went to +400. I cycled it and the count went to 836.

No hits occurred when I powered up the TV, STB, and tuner/receiver.]]> http://www.dslreports.com/forum/remark,23309633 Sun, 08 Nov 2009 10:49:37 EDT Re: Corrected blocks going through the roof! http://www.dslreports.com/forum/remark,23309624 nwrickert :
I started seeing the same "problem". Corrected blocks are accumulating at a high rate.
I rebooted the RG this morning. The rate of reported corrected blocks is now sane.

It takes a long time to properly synch after reboot.
--
AT&T Uverse; Zyxel NBG334W router (behind the 2wire gateway); openSuSE 11.0; firefox 3.0.15]]> http://www.dslreports.com/forum/remark,23309624 Sun, 08 Nov 2009 10:47:34 EDT Re: Corrected blocks going through the roof! http://www.dslreports.com/forum/remark,23309565 Tanshin : Wow, that's amazing how that can cause those kinds of problems.]]> http://www.dslreports.com/forum/remark,23309565 Sun, 08 Nov 2009 10:29:16 EDT Re: Corrected blocks going through the roof! http://www.dslreports.com/forum/remark,23308750 Keoway : I reset the RG stats at 18:00, here's the non-zero data 6.8 hours later:

Cumulative Seconds w/Errors: 40 40 0 1:43:42
Corrected Blocks: 96773 96773 0 0:11:06
Uncorrectable Blocks: 70 70 0 1:43:42

This greatly improved results is after removing the CFL from Grounded_Circuit #1. The RG resides on the circuit.

The CFL has been moved to Grounded_Circuit #2. My first attempt to relocate the CFL encountered a second deficient circuit. When the CFL was "visiting" on Improperly_Grounded_Circuit #2, the CFL still seemed to be throwing "noise" back to the RG. ]]> http://www.dslreports.com/forum/remark,23308750 Sun, 08 Nov 2009 00:48:32 EDT Re: Corrected blocks going through the roof! http://www.dslreports.com/forum/remark,23308013 Tanshin : Shoot, I forgot it was the Bag Day. They usually send a little "bag" in the mail to remind you... but they didn't this year.

Oh well!]]> http://www.dslreports.com/forum/remark,23308013 Sat, 07 Nov 2009 21:01:12 EDT Re: Corrected blocks going through the roof! http://www.dslreports.com/forum/remark,23307512 btur389w : Haha, sorry to have given you the compulsion to shop for toys. my wife won't let me shop :(

let me know how it goes.]]> http://www.dslreports.com/forum/remark,23307512 Sat, 07 Nov 2009 18:49:44 EDT Re: Corrected blocks going through the roof! http://www.dslreports.com/forum/remark,23307484 Keoway :
said by btur389w See Profile :

our techs have a very simlure tester to that. it is accurate for your tests.
Our email sidebar discussion, marrow's remarks about his circuit issue, and ACE Hardware's 20% "Fill a Bag" sale made me go shopping today! I have new toys ;-)]]> http://www.dslreports.com/forum/remark,23307484 Sat, 07 Nov 2009 18:42:36 EDT Re: Corrected blocks going through the roof! http://www.dslreports.com/forum/remark,23307451 btur389w : our techs have a very simlure tester to that. it is accurate for your tests.]]> http://www.dslreports.com/forum/remark,23307451 Sat, 07 Nov 2009 18:34:24 EDT Re: Corrected blocks going through the roof! http://www.dslreports.com/forum/remark,23307433 Keoway : After some new tests, I'm beginning to fixate on EMI within the electrical circuit where the RG is hosted and "noise" from a CFL.

I recently discovered a second deficient circuit* that has an "Open Ground" state. This evening, I added another extension cord to my collection of wiring spaghetti, in order to move the CFL to a properly grounded circuit that is different than where the RG is hosted.

I'll be monitoring closely during tonight's CU and FSU game, so I'll have new numbers later this weekend.

* To check the condition of a receptacle, I'm using one of these GB Circuit/Receptacle testers.
»www.filmtools.com/idcirtes61.html]]> http://www.dslreports.com/forum/remark,23307433 Sat, 07 Nov 2009 18:29:32 EDT Re: Corrected blocks going through the roof! http://www.dslreports.com/forum/remark,23307351 nwrickert :
They seem to be relentless and don't seem to be stopping, but so far the video looks fine this evening.
I started seeing the same "problem". Corrected blocks are accumulating at a high rate.

I am suspecting a bug in the RG firmware. At present there is no TV on, and no heavy downloading. A few minutes ago, I did a reset of the statistics so that they are counting from zero. And I am seeing:
DSL Corrected Blocks: 380668 380668 380668 0:00:00
Given the relatively low level of activity, that must be counting all blocks as requested. Or the count may even be greater than the number of blocks it has handled.
Oops, the count is now up to:
DSL Corrected Blocks: 557498 557498 557498 0:00:00
--
AT&T Uverse; Zyxel NBG334W router (behind the 2wire gateway); openSuSE 11.0; firefox 3.0.15]]> http://www.dslreports.com/forum/remark,23307351 Sat, 07 Nov 2009 18:03:01 EDT Re: Corrected blocks going through the roof! http://www.dslreports.com/forum/remark,23303705 Keoway : I use the CFL all the time, but some days it appears to be having a "bad" day and flickers. I'll try and notice whether there is any correlation with the skewed periods of corrected blocks. I'll also monitor periods when the lamp/CFL has been removed from the circuit.

With all of these discussions about various environmental issues, it also makes me wonder whether the extension cord, snaked across the floor and providing interim grounded outlet support, has any potential causality. As a 2nd floor dweller, in an MDU environment, the opportunity's for EMI are rampant. The structural elements for common walls/floors probably don't provide much shielding from EMI opportunities that my neighbors might present.

Here's what I' have this evening:
Cumulative Seconds w/Errors: 120 37 0 1:13:22
Corrected Blocks: 1229935 435127 0 0:30:05
Uncorrectable Blocks: 229 67 0 1:13:22]]> http://www.dslreports.com/forum/remark,23303705 Fri, 06 Nov 2009 18:36:02 EDT Re: Corrected blocks going through the roof! http://www.dslreports.com/forum/remark,23302813 btur389w : have you tried removing the Lamp and CFL from that circuit? some CFL Ballasts cause a small amount of Feedback that resonnates through the circuit. usually a circuit breaker takes care of resonnace for you, but if there isn't a circuit breaker between the RG and the ballast, it could cause an issue. please let me know if that helps out with those numbers any.
--
If you have any questions or concerns, please feel free to email us at uversecare@att.com.
Our goal is to provide you Excellent Customer Service. Hours: Tu-Sa 12-9 CST]]> http://www.dslreports.com/forum/remark,23302813 Fri, 06 Nov 2009 15:13:39 EDT Re: Corrected blocks going through the roof! http://www.dslreports.com/forum/remark,23299618 Keoway : An electrical ground issue is also something that I've encountered. When rearranging my TV's placement and clutter collection for easier access by the Prem Tech, I discovered that the intended outlet had an open ground.

While waiting for it to be serviced/repaired, I have had to resort to use of a 10ft(?) extension cord. It directly feeds a Kingston power strip where Cisco, 2Wire, Belkin, Samsung, and JVC all cohabit. [The other half of the outlet has a Belkin strip which supports a lamp that has a CFL.]

Here's what I have this evening, after last night's reboot:

Cumulative Seconds w/Errors: 87 4 0 0:09:55
Cumulative Sec. w/Severe Errors: 0 0 0 0:00:00
Corrected Blocks: 800325 5517 776 0:00:00]]> http://www.dslreports.com/forum/remark,23299618 Thu, 05 Nov 2009 23:29:17 EDT Re: Corrected blocks going through the roof! http://www.dslreports.com/forum/remark,23296480 marrow : Here is what was done over the course of a month and a half to fix this problem:

1. Re-grounded the NID (box outside your house where the drop connects) (AT&T field tech)

2. Replaced the HISA Balum (box inside the NID) (AT&T field tech)

3. Replaced the line drop from the pole to the NID (AT&T I/R tech)

4. Replaced the line from the NID to the gateway X 2 (I have coax, phone line, and cat 5 that can be and have been used to go into the gateway). (AT&T field tech)

5. Replaced the Gateway X 2 (AT&T field tech)

6. New Ground for the gateway plug (Electrician)

7. Replace Ground for the NID (AT&T field tech and I/R tech)

8. Replaced two of the protectors (plastic piece with two screws on the top) within the NID (I think this is what fixed the problem as the other fixes showed minimal improvements) (AT&T field tech)

If someone is having a similar problem and the suggestions above do not help, have the field tech test the line at the drop. If he/she can see the problem there, then they need to send an I/R tech (line tech). If the problem is not there, have the field tech test on the other side of the NID and on down the line until they find where the problem is occurring.]]> http://www.dslreports.com/forum/remark,23296480 Thu, 05 Nov 2009 13:07:33 EDT Re: Corrected blocks going through the roof! http://www.dslreports.com/forum/remark,23296386 aturner733 :
said by ccastiglia See Profile :

I am just going to add that I have had the same problem with corrected blocks on several occasions (I've posted about it here and/or in AT&T Direct forum in the past).

The one item I want to add to the conversation is this: my RG would go for days or weeks without a single, or at most a few, corrected blocks. Then, as if something went terribly wrong, suddenly every new block was being corrected with the numbers quickly reaching the millions, hundreds of millions, and billions until I rebooted the RG. After the reboot, things would go back to normal for a few weeks until the next episode began.

And yes, during these episodes I would experience TV frame freezes and pixellation events.
Glad to hear that I am not the only one with this same issue. Mine does the same thing, ok for a while after a reboot, then goes crazy.]]> http://www.dslreports.com/forum/remark,23296386 Thu, 05 Nov 2009 12:52:06 EDT Re: Corrected blocks going through the roof! http://www.dslreports.com/forum/remark,23295973 ccastiglia : This was my post in AT&T Direct forum last May

-------------------------------

DSL Corrected Blocks

My U-Verse connection consistently racks up humongus numbers of "DSL Corrected Blocks". Is this normal?

IP Bytes Packets Errors
Transmit: 468610811 2734306 0
Receive: 557586885 73888736 0

Data Errors
Statistics
Collected for 11 days 11:35:24

Since Reset Current 24-Hour Interval Current 15-Minute Interval Time Since Last Event

DSL Link Retrains: 0 0 0 0:00:00

DSL Training Errors: 1 0 0 11 days 11:33:09

DSL Training Timeouts: 2 0 0 11 days 11:33:32

DSL Loss of Framing Failures: 0 0 0 0:00:00

DSL Loss of Signal Failures: 0 0 0 0:00:00

DSL Loss of Power Failures: 0 0 0 0:00:00

DSL Loss of Margin Failures: 0 0 0 0:00:00

DSL Cumulative Errored Seconds: 46 0 0 1 day 11:48:38

DSL Severely Errored Seconds: 4 0 0 1 day 11:59:31

DSL Corrected Blocks: 2590858544 145964180 1129519 0:00:01

DSL Uncorrected Blocks: 279 0 0 1 day 11:48:38]]> http://www.dslreports.com/forum/remark,23295973 Thu, 05 Nov 2009 11:38:11 EDT Re: Corrected blocks going through the roof! http://www.dslreports.com/forum/remark,23295773 anon : I find it interesting that the current version is 5.29.135.47.

I'm in North Atlanta, and my RG is still using 5.29.105.94. I wonder when we'll get the latest and greatest. update.

For what it's worth, I rebooteed two days ago, and here are my numbers as of a minute ago.
DSL Corrected Blocks: 121899 1959 192 0:06:13]]> http://www.dslreports.com/forum/remark,23295773 Thu, 05 Nov 2009 11:23:27 EDT Re: Corrected blocks going through the roof! http://www.dslreports.com/forum/remark,23295365 ccastiglia : I am just going to add that I have had the same problem with corrected blocks on several occasions (I've posted about it here and/or in AT&T Direct forum in the past).

The one item I want to add to the conversation is this: my RG would go for days or weeks without a single, or at most a few, corrected blocks. Then, as if something went terribly wrong, suddenly every new block was being corrected with the numbers quickly reaching the millions, hundreds of millions, and billions until I rebooted the RG. After the reboot, things would go back to normal for a few weeks until the next episode began.

And yes, during these episodes I would experience TV frame freezes and pixellation events.]]> http://www.dslreports.com/forum/remark,23295365 Thu, 05 Nov 2009 09:54:42 EDT Re: Corrected blocks going through the roof! http://www.dslreports.com/forum/remark,23294396 anon : Seeing Corrected blocks incrementing means impulse noise protection is working, whatever line problems you have, aren't bad enough that they can't be corrected with Reed Solomon FEC and interleaving. Corrected blocks just means the parity bytes from the RS codeword are being used to recover the DMT symbol.

Uncorrected blocks simply mean the DMT symbol can't be recovered and is dropped, hence the upper layer PDU (PTM frame in this case) will be dropped as well. One uncorrected block is at least one dropped Ethernet frame.]]> http://www.dslreports.com/forum/remark,23294396 Thu, 05 Nov 2009 01:08:15 EDT Re: Corrected blocks going through the roof! http://www.dslreports.com/forum/remark,23294187 Keoway : There was heavy rain for most of Saturday. Temperatures continue to fluctuate. On Monday and Tuesday, those were the somewhat odd type of days, where the AC needs to be active for when one returns home in the evening, but then the thermostat needs to be set to Heat for the morning. Right now, its 51 with 81% humidity. Tomorrow, there will be around a 20 degree delta between the morning low of 46 and projected high of 66.

Most of my line, if not all, is underground to the MDU's Ped. The associated crossbox, DSLAM, and VRAD are in one of those roadside easement locations that's backfilled with gravel and in a heavily shaded area.
]]> http://www.dslreports.com/forum/remark,23294187 Wed, 04 Nov 2009 23:51:42 EDT Re: Corrected blocks going through the roof! http://www.dslreports.com/forum/remark,23294112 Tanshin : It seems to be slowing (especially since it hasn't gone up in 17 minutes). But we'll have to see what happens over longer time.

What is the weather situation down where you are? How about where the lines are? Just kinda curious...]]> http://www.dslreports.com/forum/remark,23294112 Wed, 04 Nov 2009 23:34:36 EDT Re: Corrected blocks going through the roof! http://www.dslreports.com/forum/remark,23294099 Keoway : I'll reboot again, if it produces runs ;-)

Here's what I'm seeing after about 2 hours of up-time:

Link Retrains: 5 5 0 1:52:36
DSL Training Errors: 2 2 0 1:51:49
Training Timeouts: 2 2 0 1:55:48
Loss of Framing Failures: 0 0 0 0:00:00
Loss of Signal Failures: 0 0 0 0:00:00
Loss of Margin Failures: 0 0 0 0:00:00
Cumulative Seconds w/Errors: 14 14 0 0:35:11
Cumulative Sec. w/Severe Errors: 0 0 0 0:00:00
Corrected Blocks: 59938 59938 0 0:17:33
Uncorrectable Blocks: 21 21 0 0:35:11
DSL Unavailable Seconds: 284 284 0 1:51:51]]> http://www.dslreports.com/forum/remark,23294099 Wed, 04 Nov 2009 23:30:14 EDT Re: Corrected blocks going through the roof! http://www.dslreports.com/forum/remark,23294084 gdm : Just because you don't see it on the TV doesn't mean anything. Corrected blocks are normal and some have hardly any and others have alot. What defines alot not sure I can tell you that either but in a 24 hour period 100,000 is lot.

When I have heavy rain I get anywhere from 15k to 40k in 15 minutes. It does causes issues with the TV only voice and internet I have no issues.

The thing to remember is with U-Verse we are all setup differently to some extent internally and even externally. Different gauge wire on the poles, aerial vs. underground, etc.]]> http://www.dslreports.com/forum/remark,23294084 Wed, 04 Nov 2009 23:27:02 EDT Re: Corrected blocks going through the roof! http://www.dslreports.com/forum/remark,23294064 Tanshin :
said by zvogt :

said by gdm See Profile :

Sorry but that many corrected blocks in 24 hours is a problem. You shouldn't have anywhere near that many.
I'm not sure I understand what you're saying. I've had U-Verse service a little over year. My first gateway probably was reset multiple times over that first year. I recently got a new gateway when the first one catastrophically failed. But in all that time, on both pieces of hardware, I've never seen my number of UNcorrected be more than a single digit number. But despite the numbers, I've also never have had a problem with the picture on my TV service. I'm not sure I understand why the numbers themselves have any inherent value (positive or negative) given that I'm not having any negative side-effects. Clearly the technology is still capable of performing as expected independent of those statistics. If I wasn't nosy, and looking at that 2Wire diagnostic page, I would never even have known that the hardware is doing all these"corrections". I'm just really having a hard time understanding how you can label it as a "problem".
You may have an issue past the router, eg in your LAN.]]> http://www.dslreports.com/forum/remark,23294064 Wed, 04 Nov 2009 23:22:23 EDT Re: Corrected blocks going through the roof! http://www.dslreports.com/forum/remark,23293791 anon :
said by gdm See Profile :

Sorry but that many corrected blocks in 24 hours is a problem. You shouldn't have anywhere near that many.
I'm not sure I understand what you're saying. I've had U-Verse service a little over year. My first gateway probably was reset multiple times over that first year. I recently got a new gateway when the first one catastrophically failed. But in all that time, on both pieces of hardware, I've never seen my number of UNcorrected be more than a single digit number. But despite the numbers, I've also never have had a problem with the picture on my TV service. I'm not sure I understand why the numbers themselves have any inherent value (positive or negative) given that I'm not having any negative side-effects. Clearly the technology is still capable of performing as expected independent of those statistics. If I wasn't nosy, and looking at that 2Wire diagnostic page, I would never even have known that the hardware is doing all these"corrections". I'm just really having a hard time understanding how you can label it as a "problem".]]> http://www.dslreports.com/forum/remark,23293791 Wed, 04 Nov 2009 22:41:41 EDT Re: Corrected blocks going through the roof! http://www.dslreports.com/forum/remark,23293767 Tanshin : Yeah, that was fixed in the firmware update. They now boot successfully in about one minute (the red-green-red... pattern was a pain before).

But they are still climbing pretty fast after the reboot.]]> http://www.dslreports.com/forum/remark,23293767 Wed, 04 Nov 2009 22:24:04 EDT Re: Corrected blocks going through the roof! http://www.dslreports.com/forum/remark,23293687 Keoway :
said by Tanshin See Profile :

...

Have you gotten the firmware update? If you have a 3800HG-V (which I believe everyone has), you would have software version 5.29.135.47. The previous version was 5.29.115.xx or 5.29.105.xx or something.
I have 5.29.105.94 on a 3800HGV-B Gateway.

I rebooted to try and get some runs ...

Here are the stats after being back on-line for 30 minutes:

Cumulative Seconds w/Errors: 5 5 5 0:03:01
Cumulative Sec. w/Severe Errors: 0 0 0 0:00:00
Corrected Blocks: 23089 23089 18847 0:01:06
Uncorrectable Blocks: 6 6 6 0:03:01
DSL Unavailable Seconds: 284 284 0 0:24:12

Yikes! It's quite daunting to see the RG lights dance between red to green and back to red then green and cycle back around several times indicating no Broadband!

Whoa, no video, no broadband, and no VOIP until the lights turn the right shade of green ;-)]]> http://www.dslreports.com/forum/remark,23293687 Wed, 04 Nov 2009 22:09:24 EDT Re: Corrected blocks going through the roof! http://www.dslreports.com/forum/remark,23293573 aturner733 : I too have had the corrected blocks go through the roof, the other day before I rebooted I was almost at a total of 1 billion and most of those happened within a few days.

After reboor everything seems fine for a while then something caused them to go crazy again. I have had several techs out and they all have done different things.

I can't really say though that the corrected blocks are causing picture problems as of yet. I have only had service for a month. I have noticed some freezing and pixelation but that could be the DVR also.

Like others have said try a reboot and see what happends.]]> http://www.dslreports.com/forum/remark,23293573 Wed, 04 Nov 2009 21:51:09 EDT Re: Corrected blocks going through the roof! http://www.dslreports.com/forum/remark,23293396 Tanshin : Once the game is over (I really hate Baseball so... I'll just ignore those discussions ;)), I would give it a reboot.

Have you gotten the firmware update? If you have a 3800HG-V (which I believe everyone has), you would have software version 5.29.135.47. The previous version was 5.29.115.xx or 5.29.105.xx or something.]]> http://www.dslreports.com/forum/remark,23293396 Wed, 04 Nov 2009 21:19:56 EDT Re: Corrected blocks going through the roof! http://www.dslreports.com/forum/remark,23293288 Keoway :
said by Tanshin See Profile :

Hmmm... never seen a non-keystone method of doing that.

My Prem Tech was from Saginaw, Michigan and helping with my area's huge backlog of installs.]]> http://www.dslreports.com/forum/remark,23293288 Wed, 04 Nov 2009 20:57:39 EDT Re: Corrected blocks going through the roof! http://www.dslreports.com/forum/remark,23293266 Keoway : Indeed! In honor of all the Cullinet support folks that used to be based at Scott II Plaza, the Phillies get my support :)]]> http://www.dslreports.com/forum/remark,23293266 Wed, 04 Nov 2009 20:53:00 EDT Re: Corrected blocks going through the roof! http://www.dslreports.com/forum/remark,23293213 MSeng : I understand (go Phillies). :)

For what its worth, when I had the problem it was the first and only time I did a manual reboot since my install in late November, 2008.
--
If things get any worse, I'll have to ask you to stop helping me.]]> http://www.dslreports.com/forum/remark,23293213 Wed, 04 Nov 2009 20:43:25 EDT Re: Corrected blocks going through the roof! http://www.dslreports.com/forum/remark,23293184 Keoway : Can't be offline during baseball ;-)

The current numbers:
Corrected Blocks: 803219732 78302247 1860495 0:00:00

Uncorrectable Blocks: 5075 303 0 0:23:05

Note: The RG has never been rebooted. My install was on 10/15 and the box has been live, since the Prem Tech brought it on-line.]]> http://www.dslreports.com/forum/remark,23293184 Wed, 04 Nov 2009 20:38:35 EDT Re: Corrected blocks going through the roof! http://www.dslreports.com/forum/remark,23293118 gdm : Sorry but that many corrected blocks in 24 hours is a problem. You shouldn't have anywhere near that many. ]]> http://www.dslreports.com/forum/remark,23293118 Wed, 04 Nov 2009 20:26:21 EDT Re: Corrected blocks going through the roof! http://www.dslreports.com/forum/remark,23293109 MSeng : I had an identical problem a few weeks ago -- up until that point my connection was pretty much rock solid and trouble free.

After doing a little research in this forum on the issue, I found where others experiencing the problem cleared it by rebooting the RG. Lo and behold, it worked for me too.

I would suggest you give it a shot. Certainly can't hurt. :)
--
If things get any worse, I'll have to ask you to stop helping me.]]> http://www.dslreports.com/forum/remark,23293109 Wed, 04 Nov 2009 20:25:18 EDT Re: Corrected blocks going through the roof! http://www.dslreports.com/forum/remark,23293011 anon : I see a lot of threads here of people questioning the volume of corrected blocks as assuming that is the cause of whatever their symptom is. I just don't think that's true. My numbers have always shown about 500,000,000 corrected blocks in the last 24 hours and zero uncorrected blocks. And I personally watch more than 50 hours of television each and every week. And I wouldn't say that I've "never" seen a blip or two of pixelization, but I would say that it's "almost never". My point is, I just don't think that the two events equate to each other in any way. I think the corrected blocks are just a fact of life, and by themselves are not indicative of anything wrong.]]> http://www.dslreports.com/forum/remark,23293011 Wed, 04 Nov 2009 20:17:10 EDT Re: Corrected blocks going through the roof! http://www.dslreports.com/forum/remark,23293029 Tanshin : Hmmm... never seen a non-keystone method of doing that.

That's all I can really think of (based off experience). I guess we'll just have to wait and see for now.]]> http://www.dslreports.com/forum/remark,23293029 Wed, 04 Nov 2009 20:13:36 EDT Re: Corrected blocks going through the roof! http://www.dslreports.com/forum/remark,23292778 Keoway : Google sometimes works wonders, when the terms are right ;-)

I don't have a Keystone implementation. The Prem Tech augmented the existing wiring with a Cat5 extension directly to the RG.

Photo's here of "before" and "after" the Prem Tech visit:
»MDU NID: Do old ones present any challenges? ]]> http://www.dslreports.com/forum/remark,23292778 Wed, 04 Nov 2009 19:35:29 EDT Re: Corrected blocks going through the roof! http://www.dslreports.com/forum/remark,23292735 Keoway : Could you define "keystone side"?]]> http://www.dslreports.com/forum/remark,23292735 Wed, 04 Nov 2009 19:27:06 EDT Re: Corrected blocks going through the roof! http://www.dslreports.com/forum/remark,23292705 Tanshin : Just a small thing you can check (I had an instance like this a while back). Find the jack from where your Homerun comes and give the keystone side a squeeze.

When I did that it made the spikes stop.]]> http://www.dslreports.com/forum/remark,23292705 Wed, 04 Nov 2009 19:21:15 EDT Re: Corrected blocks going through the roof! http://www.dslreports.com/forum/remark,23292673 Keoway : Now up to 61 million for the 24 hour interval.

Speedtest still looks good at 11.39/1.43 for a 12M service tier. The video also remains good this evening with no instances of picture freezes or pixellation, so far ...

[Email with BAN and VOIP sent.]]]> http://www.dslreports.com/forum/remark,23292673 Wed, 04 Nov 2009 19:17:08 EDT Re: Corrected blocks going through the roof! http://www.dslreports.com/forum/remark,23292459 btur389w : Yes.

Keoway, my name is Bobbie, I am from Uverse Tier 2 Technical Support, and I look for members like you who have not found traditional methods of resolution. We would love to assist you, if you could email your Billing Account Number (BAN) and a good contact number so we can look into this issue for you.

Our email is UverseCare@att.com

Thanks,

UVerse Care
--
If you have any questions or concerns, please feel free to email us at uversecare@att.com.
Our goal is to provide you Excellent Customer Service. Hours: Tu-Sa 12-9 CST]]> http://www.dslreports.com/forum/remark,23292459 Wed, 04 Nov 2009 18:42:08 EDT Corrected blocks going through the roof! http://www.dslreports.com/forum/remark,23292436 Keoway : Ouch, is this why I've had pixellation and freezes over the past two days?


Corrected Blocks: 777889401 52971916 2104197 0:00:01

Do I need to be concerned about this error rate?

They seem to be relentless and don't seem to be stopping, but so far the video looks fine this evening.
Click for full size
2Wire States
]]> http://www.dslreports.com/forum/remark,23292436 Wed, 04 Nov 2009 18:38:00 EDT