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[konrado5]

I have just knowed that my ISP changed DSLAM. From that time I have above 2 Mbps slower synchronization rate. I've always had about 18000 kbps however now I have only about 15000 kbps. Day before my ISP changed DSLAM I had 4951 kbps synchronization rate.
http://img109.imageshack.us/img109/249/uvoi.png
At that day my ISP restored default profile and I got 20551 kbps.
http://img843.imageshack.us/img843/248/jn8z.png
Unfortunately next day my ISP changed DSLAM and I have only about 15000 kbps.
http://img818.imageshack.us/img818/5452/okuq.png
My attenuation is slight lower but synchronization is also lower.
I've noticed also gap between 411-477. What is happening?

Below there is SNR on particular tones.

Code: [Select]

adsl: ADSL driver and PHY status
Status: ShowtimeRetrain Reason: 8000
Channel: FAST, Upstream rate = 1213 Kbps, Downstream rate = 15020 Kbps
Tone number      SNR
   0 0.0000
   1 0.0000
   2 0.0000
   3 0.0000
   4 0.0000
   5 0.0000
   6 0.0000
   7 0.0000
   8 0.0000
   9 0.0000
   10 0.0000
   11 0.0000
   12 0.0000
   13 0.0000
   14 0.0000
   15 0.0000
   16 0.0000
   17 0.0000
   18 0.0000
   19 0.0000
   20 0.0000
   21 0.0000
   22 0.0000
   23 0.0000
   24 0.0000
   25 0.0000
   26 0.0000
   27 0.0000
   28 0.0000
   29 0.0000
   30 0.0000
   31 0.0000
   32 0.0000
   33 41.1250
   34 41.9375
   35 42.6250
   36 43.0000
   37 43.1875
   38 43.3750
   39 43.5000
   40 43.6250
   41 43.5625
   42 43.8750
   43 44.0625
   44 44.0000
   45 43.6875
   46 43.6250
   47 43.1875
   48 42.7500
   49 43.4375
   50 42.2500
   51 41.0625
   52 41.1250
   53 41.1875
   54 40.7500
   55 41.0625
   56 41.3125
   57 42.1875
   58 42.5000
   59 42.2500
   60 43.8750
   61 44.3750
   62 44.6875
   63 45.5625
   64 46.0625
   65 46.6875
   66 47.6250
   67 47.1875
   68 47.6875
   69 47.8750
   70 48.1250
   71 48.1875
   72 48.6250
   73 48.6250
   74 49.1250
   75 49.0000
   76 48.4375
   77 49.1250
   78 48.8125
   79 47.6875
   80 48.2500
   81 49.0000
   82 48.5625
   83 47.9375
   84 48.0000
   85 48.3750
   86 48.3750
   87 48.6875
   88 48.5625
   89 47.8125
   90 48.7500
   91 48.6250
   92 48.6875
   93 48.0625
   94 47.7500
   95 47.7500
   96 47.6875
   97 47.2500
   98 47.3125
   99 46.6875
   100 47.6250
   101 47.6250
   102 47.8125
   103 47.6875
   104 48.0625
   105 48.0625
   106 47.5000
   107 47.8750
   108 48.4375
   109 48.4375
   110 48.6875
   111 49.3750
   112 49.7500
   113 49.4375
   114 47.4375
   115 49.3125
   116 49.0625
   117 49.2500
   118 49.3125
   119 49.1875
   120 49.8125
   121 49.5625
   122 49.5000
   123 49.0000
   124 48.3750
   125 48.6250
   126 48.6875
   127 48.2500
   128 47.6875
   129 48.0000
   130 47.8125
   131 46.6250
   132 46.6875
   133 46.8750
   134 45.9375
   135 46.0625
   136 45.8125
   137 46.1875
   138 45.7500
   139 45.1875
   140 45.0000
   141 45.3750
   142 45.7500
   143 45.5625
   144 45.1875
   145 45.7500
   146 45.4375
   147 45.1875
   148 45.7500
   149 46.2500
   150 46.4375
   151 46.0625
   152 46.1250
   153 45.5000
   154 46.1875
   155 46.3750
   156 46.4375
   157 46.6875
   158 46.2500
   159 46.1250
   160 47.1875
   161 46.8125
   162 46.6875
   163 46.9375
   164 45.4375
   165 46.1875
   166 45.8125
   167 45.0000
   168 45.0000
   169 44.9375
   170 44.9375
   171 45.0625
   172 43.3750
   173 43.0625
   174 43.5000
   175 43.8750
   176 42.6875
   177 42.7500
   178 42.5000
   179 42.4375
   180 41.0000
   181 41.1875
   182 41.5625
   183 41.6250
   184 41.0000
   185 40.3750
   186 40.7500
   187 41.3750
   188 40.8125
   189 40.9375
   190 41.3125
   191 41.5000
   192 41.2500
   193 41.1250
   194 41.0000
   195 41.5625
   196 41.0625
   197 40.9375
   198 40.4375
   199 40.5625
   200 40.0625
   201 40.3750
   202 40.0625
   203 39.5000
   204 40.0625
   205 40.0000
   206 40.3125
   207 39.8750
   208 39.1250
   209 38.9375
   210 39.3125
   211 39.1875
   212 39.7500
   213 39.0625
   214 38.9375
   215 38.1250
   216 38.5000
   217 38.1250
   218 38.9375
   219 39.1875
   220 39.0000
   221 39.3125
   222 39.6250
   223 39.1250
   224 39.7500
   225 39.7500
   226 39.8750
   227 39.1875
   228 41.0625
   229 40.1875
   230 40.5000
   231 41.5000
   232 40.6250
   233 40.5625
   234 41.3125
   235 40.9375
   236 40.8750
   237 41.5625
   238 41.2500
   239 41.0000
   240 41.4375
   241 41.2500
   242 42.0000
   243 41.4375
   244 41.3125
   245 40.8750
   246 41.6250
   247 42.1250
   248 42.3750
   249 41.4375
   250 41.6875
   251 41.2500
   252 41.5000
   253 41.4375
   254 41.4375
   255 41.0625
   256 41.4375
   257 40.7500
   258 40.6250
   259 40.6875
   260 39.9375
   261 40.5625
   262 40.0625
   263 40.6250
   264 40.5000
   265 39.9375
   266 40.5625
   267 40.1250
   268 39.9375
   269 40.5000
   270 40.3750
   271 40.2500
   272 39.5000
   273 39.8125
   274 40.5000
   275 40.6250
   276 40.1875
   277 40.5625
   278 40.6875
   279 40.0000
   280 40.8125
   281 40.5000
   282 40.4375
   283 39.5625
   284 39.3750
   285 39.2500
   286 40.1250
   287 40.7500
   288 40.7500
   289 40.9375
   290 39.5625
   291 40.3125
   292 39.8750
   293 38.8125
   294 39.1875
   295 39.7500
   296 38.5625
   297 38.8750
   298 39.3750
   299 39.1250
   300 38.9375
   301 38.9375
   302 38.8750
   303 39.4375
   304 37.1875
   305 39.0000
   306 37.8750
   307 37.6875
   308 38.5625
   309 38.7500
   310 38.3750
   311 38.3750
   312 38.0625
   313 38.3125
   314 38.6250
   315 38.6875
   316 38.2500
   317 37.9375
   318 38.8750
   319 37.5000
   320 38.6250
   321 38.0625
   322 38.1875
   323 37.7500
   324 37.8750
   325 38.0625
   326 38.5625
   327 37.6250
   328 37.6250
   329 37.7500
   330 37.2500
   331 37.6250
   332 37.3750
   333 37.8125
   334 36.8750
   335 37.9375
   336 37.0625
   337 37.9375
   338 37.8750
   339 37.9375
   340 37.6250
   341 37.8750
   342 37.6250
   343 36.3125
   344 37.4375
   345 37.0000
   346 36.6875
   347 36.1875
   348 37.1875
   349 36.3750
   350 35.9375
   351 36.1250
   352 36.1875
   353 36.0000
   354 36.4375
   355 35.8125
   356 36.5625
   357 36.0625
   358 35.8750
   359 36.5625
   360 36.6875
   361 36.1875
   362 36.0000
   363 35.5000
   364 36.5000
   365 35.8125
   366 35.1250
   367 36.1250
   368 35.7500
   369 35.5625
   370 35.5000
   371 35.0625
   372 35.1875
   373 35.7500
   374 36.2500
   375 35.5625
   376 35.1250
   377 34.8125
   378 34.8750
   379 34.6875
   380 35.5000
   381 35.1250
   382 34.7500
   383 34.1250
   384 33.8750
   385 33.5625
   386 34.5625
   387 34.3750
   388 33.1875
   389 34.5000
   390 34.2500
   391 33.6875
   392 33.0000
   393 32.7500
   394 32.1250
   395 31.3750
   396 30.6875
   397 29.8750
   398 29.0000
   399 28.3125
   400 27.0625
   401 25.8750
   402 24.5625
   403 23.0625
   404 21.3750
   405 20.3125
   406 18.5625
   407 17.3125
   408 16.3125
   409 15.3750
   410 14.1875
   411 0.0000
   412 0.0000
   413 0.0000
   414 0.0000
   415 0.0000
   416 0.0000
   417 0.0000
   418 0.0000
   419 0.0000
   420 0.0000
   421 0.0000
   422 0.0000
   423 0.0000
   424 0.0000
   425 0.0000
   426 0.0000
   427 0.0000
   428 0.0000
   429 0.0000
   430 0.0000
   431 0.0000
   432 0.0000
   433 0.0000
   434 0.0000
   435 0.0000
   436 0.0000
   437 0.0000
   438 0.0000
   439 0.0000
   440 0.0000
   441 0.0000
   442 0.0000
   443 0.0000
   444 0.0000
   445 0.0000
   446 0.0000
   447 0.0000
   448 0.0000
   449 0.0000
   450 0.0000
   451 0.0000
   452 0.0000
   453 0.0000
   454 0.0000
   455 0.0000
   456 0.0000
   457 0.0000
   458 0.0000
   459 0.0000
   460 0.0000
   461 0.0000
   462 0.0000
   463 0.0000
   464 0.0000
   465 0.0000
   466 0.0000
   467 0.0000
   468 0.0000
   469 0.0000
   470 0.0000
   471 0.0000
   472 0.0000
   473 0.0000
   474 0.0000
   475 0.0000
   476 0.0000
   477 0.0000
   478 0.0000
   479 15.0625
   480 16.3750
   481 16.1875
   482 17.7500
   483 19.9375
   484 21.5625
   485 22.5625
   486 24.1875
   487 25.5000
   488 26.3125
   489 27.6250
   490 28.7500
   491 29.7500
   492 30.3750
   493 30.5000
   494 30.9375
   495 30.8750
   496 30.5625
   497 30.0000
   498 30.4375
   499 30.3125
   500 29.9375
   501 30.2500
   502 30.5625
   503 29.9375
   504 30.1875
   505 29.1875
   506 30.2500
   507 30.1875
   508 29.9375
   509 27.4375
   510 28.0000
   511 24.2500
Below there are my connection's statistics:

Code: [Select]

adsl: ADSL driver and PHY status
Status: ShowtimeRetrain Reason: 8000
Channel: FAST, Upstream rate = 1221 Kbps, Downstream rate = 15060 Kbps
Link Power State: L0
Mode: ADSL2+
Channel: Fast
Trellis: U:ON /D:ON
Line Status: No Defect
Training Status: Showtime
Down Up
SNR (dB): 6.3 6.9
Attn(dB): 25.0 14.8
Pwr(dBm): 18.6 12.2
Max(Kbps): 17896 1225
Rate (Kbps): 15060 1221
G.dmt framing
K: 255(0) 38
R: 0 0
S: 1 1
D: 1 1
ADSL2 framing
MSGc: 113 16
B: 254 37
M: 1 1
T: 1 3
R: 0 0
S: 0.5396 0.9870
L: 3780 308
D: 1 1
Counters
SF: 151617 785126
SFErr: 13 0
RS: 0 0
RSCorr: 0 0
RSUnCorr: 0 0

HEC: 9 0
OCD: 0 0
LCD: 0 0
Total Cells: 446238788 1071642237
Data Cells: 19096788 14601431
Drop Cells: 0
Bit Errors: 0 548

ES: 46 0
SES: 1 0
UAS: 71 483
AS: 12561

INP: 0.00 0.00
PER: 16.05 16.28
delay: 0.13 0.24
OR: 59.29 10.80

Bitswap: 78 0

Total time = 4 hours 5 min 17 sec
SF  = 910345
CRC = 489
LOS = 1
LOF = 9
ES  = 46
Latest 1 day time = 4 hours 5 min 17 sec
SF  = 910345
CRC = 489
LOS = 1
LOF = 9
ES  = 46
Latest 15 minutes time = 5 min 17 sec
SF  = 19804
CRC = 0
LOS = 0
LOF = 0
ES  = 0
Previous 15 minutes time = 15 min 0 sec
SF  = 56036
CRC = 5
LOS = 0
LOF = 0
ES  = 5
Previous 1 day time = 0 sec
SF  = 0
CRC = 0
LOS = 0
LOF = 0
ES  = 0
15 minutes interval [-30 min to -15 min] time = 15 min 0 sec
SF  = 56098
CRC = 6
LOS = 0
LOF = 0
ES  = 5
15 minutes interval [-45 min to -30 min] time = 15 min 0 sec
SF  = 56036
CRC = 5
LOS = 0
LOF = 0
ES  = 5
15 minutes interval [-60 min to -45 min] time = 15 min 0 sec
SF  = 56037
CRC = 3
LOS = 0
LOF = 0
ES  = 3
Showtime Drop Reason: 8000
Last Retrain Reason: 8000

[kitz]

I've long waited for your reply.
http://forum.kitz.co.uk/index.php/topic,13029.0.html
My ISP say my bit-loading and SNR on particular tones is normal. I've heard it is bad.

Im sorry but atm I really dont have time to look at this.  Ive tried in the past to help but not sure if my answers have sunk in.
By all means bump in the thread, but Ive asked in the past Please dont PM me or my mods if I dont answer.

Perhaps someone else would be kind enough to pick this up for me and have a look to see if theres anything new here.

Cheers.

[GigabitEthernet]

Could you please stop creating new threads on similar issues and just add these issues to one thread? It keeps the forum much cleaner and it makes it much easier for people in similar situations to you to find the help they need.

In addition, could you please stop sending me (and others) PMs about your issues. It won't get them solved any faster. If you have problems, please just post in the necessary thread. PMs are for issues between two members, not for getting help on an existing thread.

Thank you.

[kitz]

Since its now come to my attention that you are PMing several forum members, this really is not acceptable!
Take it as a warning that if it happens again, I will have no alternative but to use moderation powers.

Ive requested several times in the past that you don't do this.  Members here spend a lot of their own free time trying to assist people.  We give our time freely for no reward, but it gets tiresome for members to repeat the same things over again. Its also not gone un-noticed that the same questions have also been asked on other forums around the globe where you've also not taken heed that most of what you see is normal aspects of how adsl works. 

You have been given far more leeway due to the fact that there may be lingual and autistic problems and we have tried to be helpful where we can, but you tend to focus on the small things rather than look at the broader picture.  This deters others from trying to help if they feel they are wasting their time for no thanks. 


You may have a (new) problem with that gap in tones.  However that looks remarkably like a guard band similar to what Be/o2 use - its in a similar frequency range.  If your ISP has installed a new DSLAM then its possible that this is their doing.  Have you asked them?  If not it could be local interference from a radio station/transmitter.
 

[konrado5]

What is bad with PMing? On polish forums people doesn't claim about PMing. I think my last PMing you is really acceptable because I could suspect you missed the thread because I've waited a long. I've asked my ISP but they said me it is typical bit-loading for long line (about 1.2 KM distance from exchange). They encouraged me I check SNR on tones on other ADSL2+ lines.
I check SNR for particular tones recently because I've found a hole in my router. My router doesn't have telnet.
http://img109.imageshack.us/img109/9496/z2gv.png

[kitz]

1. Because Ive asked you in the past not to do so. 
2. It puts pressure on people to answer when they may not have the time to do so.
3. We are volunteers who help and dont like it when people demand an answer
4. It says so in the bottom of my signature
5. Its considered rude.
6. I feel like the posts are a stuck record repeating the same things
7. Its damn annoying when someone gives you an answer, then you ask the same thing of someone else.
8. In the past youve been given answers by some of the best people who know about technology and routers for free
9. Because Im tired and have a zillion other things to do than answer the same questions. 
10.  Youve crossed the line.

----
Asbos told you in the past their is no way you are going to be able to get your router to telnet without following his suggestions which you ignored..  so you go asking elsewhere.  Not once have you said thank you to anyone for all the time and efforts and patience they put into answering your questions.

Go buy another router if its that important..... or just take a break and enjoy your connection..  or take a break away from the PC.   
Push my button once more and you will be taking a permanent break away from this forum.

[konrado5]

I'm sorry. English is not my first language and thereby I can make impression I'm rude. I really thank you for all help.

sbos told you in the past their is no way you are going to be able to get your router to telnet without following his suggestions which you ignored..  so you go asking elsewhere.

I'm not ignored this suggestion. I've tried it and it doesn't work. However I can without telnet check "adsl info --stats" and similar. Following there is screenshot how is it possible.
http://img109.imageshack.us/img109/9496/z2gv.png

[burakkucat]

. . . English is not my first language . . .

We all realise that. 

However I can without telnet check "adsl info --stats" and similar. Following there is screenshot how is it possible.
http://img109.imageshack.us/img109/9496/z2gv.png

That is a very clever tip. Thank you for showing it.

[konrado5]

Thank you for your help. Your hints are turned out to be helpful. I understanded. about some things that they are normal ADSL2+ conditions. However now I have a another problem.

Is it possible that wide gap between 411-477 tones is line fault and not radio transmission? In my town there isn't any radio broadcasted. I'd like to complain my ISP about these interferences. However technician consultant say me my bit-loading is typical for ADSL2+ on long lines. He pleased me to compare my SNR with SNR on other ADSL2+ connections.

Perhaps my Hlog will be helpful to diagnose.

Code: [Select]

Tone number      Hlog
   0 -97.2500
   1 -64.4375
   2 -67.8125
   3 -67.8125
   4 -67.8125
   5 -67.8125
   6 -67.8125
   7 -67.8125
   8 -73.4375
   9 -73.4375
   10 -73.4375
   11 -73.4375
   12 -73.4375
   13 -73.4375
   14 -73.4375
   15 -73.4375
   16 -73.4375
   17 -97.2500
   18 -70.8125
   19 -75.1250
   20 -64.0000
   21 -61.7500
   22 -60.3750
   23 -58.8750
   24 -55.1875
   25 -52.6875
   26 -49.6875
   27 -47.3125
   28 -44.8125
   29 -42.2500
   30 -39.8125
   31 -37.7500
   32 -35.6250
   33 -33.6250
   34 -31.8125
   35 -30.0625
   36 -28.4375
   37 -27.0000
   38 -25.7500
   39 -24.6875
   40 -24.0000
   41 -23.5625
   42 -23.3750
   43 -23.5000
   44 -23.7500
   45 -24.1875
   46 -24.6875
   47 -25.3750
   48 -26.1250
   49 -26.8125
   50 -27.5000
   51 -28.1875
   52 -28.6875
   53 -29.1250
   54 -29.3750
   55 -29.5000
   56 -29.3750
   57 -29.1250
   58 -28.6875
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[kitz]

hlog is based on your attenuation and the figures it looks normal. 
A quick scan down the column shows the normal increases youd expect to see on any line.   I dont see any evidence of a bridge tap line fault from those figures.

The block on SNRm looks remarkably like a dslam configurement like you'd see with some UK providers such as Be/O2, who supposedly at one point stated it was blocked  to do with maritime transmission.   However I notice a slight dip in snr both before and after which could point to radio/EMI interference being the cause.   Got any amateur radio hams near you?  Any radio mast/transmitters?

[GigabitEthernet]

Your line looks in most respects, very good. I don't think you are going to get much better without moving closer to the exchange.

You're at the point now where changing things will make maybe 0.1% of a difference or it may even make the connection worse.

I'd honestly just leave it alone and be happy with what you've got. Your connection is better than most of the UK (and the world for that matter). It's certainly much faster than mine .

[konrado5]

Thank you for checking my Hlog. I'm delighted my line characteristic is good.

I'd honestly just leave it alone and be happy with what you've got. Your connection is better than most of the UK (and the world for that matter). It's certainly much faster than mine .

However I have about 3 Mbps less than I had until recently. Besides, I like to gain new knowledge about ADSL technology and my curiosity caused slight improvement of my service, for example my ISP changed pair and my troughput became about 2 Mbps raised. I'm not complain rather i'm only curious about real possibilities of my line.

Got any amateur radio hams near you?  Any radio mast/transmitters?

I think there aren't any radio transmission near me. Is line fault excluded as cause of these interferences? Recently my ISP changed DSLAM. Is it possible they did something bad with cables? What can I report to my ISP?
What about my QLN

Code: [Select]

Tone number      QLN
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[burakkucat]

There is an English saying that 'a picture is worth a thousand words', so I have plotted your Hlog data and the graph is attached, below.

I cannot see anything to be a cause for concern. I make the comment that the undulations (ripples) seen from just below tone 100 to just below tone 400 look characteristic of a pair which is made up separate sections of cable with different 'poundage'. (Different diameter conductors, in different sections.) However I repeat that it is not a defect and it is nothing to be concerned about. 

Edited to add: I now see that you have provided the QLN data for your line. So I also attach that graph. From it we can see that there are no discrete radio transmissions visible just that there is a very 'broad hump' of background 'mush' from around tone 60 to tone 380. My suspicion is that it is just the normal 'atmospheric radio background' for that frequency range in Poland. Once again, there is nothing that your ISP can do. 

[kitz]

>> Is it possible they did something bad with cables?

Highly unlikely to be anything to do with the cables.

>>  Recently my ISP changed DSLAM.

This is a strong possibility if the dslam has been configured to ignore certain tones. 
This isnt too unusual - see "DSLAM Specific Tones".  This is done to prevent interference from radio transmissions, such as gov maritime frequencies which may overlap tones in the region you are seeing.   Your ISP should know if this is the case.

>> I think there aren't any radio transmission near me. Is line fault excluded as cause of these interferences?

To be honest looking at the SNR stats you posted this would be the most likely explanation.  The decline just before and after the blocked tones gives the impression that it is EMI/radio interference.   I can not say this for certain, it just looks like it to me.. call it a hunch as being the most likely reason but I have no evidence to prove it.   

Proving it could be difficult because it could come from various sources.  Its not a line fault, nor is it anything an ISP can do anything about because it falls outside their jurisdiction.   It could come from possible sources.  Amateur radio hams is a possible one.  Other reasons we have seen is a faulty neighbours TV set or treadmills (the running machines) giving off EMI.    Unfortunately you may be on your own when it comes to tracing these type of faults.   In the UK we may be able to fight to get BT to call in a REIN specialist, but Im not sure if anything like that is available where you are.  All I can do is direct you to the REIN page which has helped many in similar situations who have EMI problems.

I could be wrong, but because those frequencies are so very close as to what is used for maritime and amateur radio enthusiasts, if it was me, Id be wondering if anyone local was broadcasting.  Does anyone in your area have a stonking big radio aerial?   

[kitz]

Thanks b*cat.. our posts crossed and I didnt see your graphs until Id finished my post.   I will have to have a look again in a minute as I need to rescue something from the oven (smells burning)