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[konrado5]

Thank you for reply.

Looking at that region of the SNR graph, we see nothing above 0 dB.

Because my router shows SNR 0 dB at unused tones. Sometimes my router doesn't use 410 tone, sometimes use. If my router doesn't use 410 tone I have 0 dB on 410 tone.

Perhaps the tones, corresponding to that frequency band, are not used by xDSL services in Poland?

So far as I know these tones are used in Poland. So far as I know nobody broadcast amateur radio in my town. Besides, nearly these tones I have the most stable SNR.

I've reported this issue to my ISP some months ago, hovever they said me: this SNR graph is normal on ADSL2+ long lines.

Looking at that region of the Qln graph, it is so low and flat (compared to the rest of the plot) that it makes me wonder if the receive circuitry of the modem is actually operational over those tones?

Is it possible this is caused by my router fault?

Perhaps text datas will be helpful.

Code: [Select]

adsl: ADSL driver and PHY status
Status: ShowtimeRetrain Reason: 8000
Channel: FAST, Upstream rate = 1245 Kbps, Downstream rate = 16248 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 39.8750
   34 40.8125
   35 41.7500
   36 42.0000
   37 42.4375
   38 42.8125
   39 42.9375
   40 43.0000
   41 42.9375
   42 43.5000
   43 43.5000
   44 43.6250
   45 43.1875
   46 42.8750
   47 43.1250
   48 42.4375
   49 41.5000
   50 41.6250
   51 41.4375
   52 41.6250
   53 40.9375
   54 41.0000
   55 41.0000
   56 40.8125
   57 41.9375
   58 41.5625
   59 42.7500
   60 43.5000
   61 43.5625
   62 44.8750
   63 44.3125
   64 45.8750
   65 46.1250
   66 46.3750
   67 46.8125
   68 47.1250
   69 47.2500
   70 47.3750
   71 48.6250
   72 48.1875
   73 48.6250
   74 48.9375
   75 48.2500
   76 48.4375
   77 48.8125
   78 48.5625
   79 47.9375
   80 48.5625
   81 48.7500
   82 48.2500
   83 48.6250
   84 48.6875
   85 47.7500
   86 47.5000
   87 47.4375
   88 47.7500
   89 47.4375
   90 48.0625
   91 47.6875
   92 47.6250
   93 47.9375
   94 47.3750
   95 47.0000
   96 46.8125
   97 46.8125
   98 47.1250
   99 46.9375
   100 47.0625
   101 47.3750
   102 47.0000
   103 46.3125
   104 47.0625
   105 47.5000
   106 47.1875
   107 47.8750
   108 47.7500
   109 47.7500
   110 48.2500
   111 48.0625
   112 46.3750
   113 48.6250
   114 48.8125
   115 48.5625
   116 41.3125
   117 49.3125
   118 49.2500
   119 48.9375
   120 49.3750
   121 49.2500
   122 48.6875
   123 48.5000
   124 48.9375
   125 48.8125
   126 48.4375
   127 48.0000
   128 47.4375
   129 47.8750
   130 47.0625
   131 46.6875
   132 46.6250
   133 46.0000
   134 46.6875
   135 45.5625
   136 45.0000
   137 45.1250
   138 44.9375
   139 44.8125
   140 45.3125
   141 44.5625
   142 44.6875
   143 45.0625
   144 45.1250
   145 45.6875
   146 45.9375
   147 45.5625
   148 46.0625
   149 45.7500
   150 46.1250
   151 45.6250
   152 46.0000
   153 46.8750
   154 47.2500
   155 46.6875
   156 46.5000
   157 46.6875
   158 46.3750
   159 46.5625
   160 46.9375
   161 47.0625
   162 46.8125
   163 46.8125
   164 46.3750
   165 45.4375
   166 45.4375
   167 45.4375
   168 45.3125
   169 44.8125
   170 44.1250
   171 44.0625
   172 43.6875
   173 44.0625
   174 43.4375
   175 42.6875
   176 42.5000
   177 42.5625
   178 42.1250
   179 42.2500
   180 41.8125
   181 41.8750
   182 41.8750
   183 42.1250
   184 41.1875
   185 41.6875
   186 42.1875
   187 40.9375
   188 41.1250
   189 41.5625
   190 41.2500
   191 41.0625
   192 40.8750
   193 41.0000
   194 39.8750
   195 40.8125
   196 41.3750
   197 40.8125
   198 40.1875
   199 40.8125
   200 40.1250
   201 40.2500
   202 39.5625
   203 39.7500
   204 38.8750
   205 38.3750
   206 39.1875
   207 38.3125
   208 38.5625
   209 38.3125
   210 38.8750
   211 37.7500
   212 38.2500
   213 38.0625
   214 38.5625
   215 38.0625
   216 37.8750
   217 38.7500
   218 37.9375
   219 38.1875
   220 38.4375
   221 38.2500
   222 38.4375
   223 38.3125
   224 38.6875
   225 38.2500
   226 38.4375
   227 38.8125
   228 38.6875
   229 39.0000
   230 39.1250
   231 39.5625
   232 39.0000
   233 39.6250
   234 40.0625
   235 39.6875
   236 39.8750
   237 40.6250
   238 40.6250
   239 40.9375
   240 40.8125
   241 40.5000
   242 40.5000
   243 41.1875
   244 40.9375
   245 41.0625
   246 41.6875
   247 41.2500
   248 41.1250
   249 41.3750
   250 41.0000
   251 41.5625
   252 41.4375
   253 41.0625
   254 41.1250
   255 41.6875
   256 41.2500
   257 41.1250
   258 41.1250
   259 41.1250
   260 41.3750
   261 40.8125
   262 41.7500
   263 41.1875
   264 40.5625
   265 40.7500
   266 40.5625
   267 40.6250
   268 40.9375
   269 41.1875
   270 40.2500
   271 40.3750
   272 39.9375
   273 40.4375
   274 40.1250
   275 40.0625
   276 39.8125
   277 40.1250
   278 39.7500
   279 39.9375
   280 39.9375
   281 39.6250
   282 39.9375
   283 39.3750
   284 40.1250
   285 40.2500
   286 39.8750
   287 39.8750
   288 40.6250
   289 40.1250
   290 39.8125
   291 40.3750
   292 40.5000
   293 40.7500
   294 39.6875
   295 40.0625
   296 39.3750
   297 39.3750
   298 39.8125
   299 39.0000
   300 38.7500
   301 38.6875
   302 39.0000
   303 39.0000
   304 38.1250
   305 38.5000
   306 37.7500
   307 38.3125
   308 38.5625
   309 38.2500
   310 38.0000
   311 38.1250
   312 38.3750
   313 38.7500
   314 38.5625
   315 37.9375
   316 38.3750
   317 38.2500
   318 38.4375
   319 37.6875
   320 38.1250
   321 38.4375
   322 38.1250
   323 37.7500
   324 37.9375
   325 38.0625
   326 38.8125
   327 38.3750
   328 37.8750
   329 37.7500
   330 37.3750
   331 37.8750
   332 38.0000
   333 38.0000
   334 37.1250
   335 37.6875
   336 37.4375
   337 36.8750
   338 37.4375
   339 37.2500
   340 37.3125
   341 37.7500
   342 37.9375
   343 37.0000
   344 37.1875
   345 36.9375
   346 37.4375
   347 37.0625
   348 37.0625
   349 36.8750
   350 37.0000
   351 36.8750
   352 35.0625
   353 36.5625
   354 36.1250
   355 35.8125
   356 35.1250
   357 35.8750
   358 36.3125
   359 35.8750
   360 35.6875
   361 35.6875
   362 35.5000
   363 35.6250
   364 35.5625
   365 35.6250
   366 35.6250
   367 35.5625
   368 36.3125
   369 35.5000
   370 35.3750
   371 35.2500
   372 35.6875
   373 35.2500
   374 34.3125
   375 35.1875
   376 35.1250
   377 34.3125
   378 34.3125
   379 34.9375
   380 34.7500
   381 34.6250
   382 33.5625
   383 33.6250
   384 34.6875
   385 34.3750
   386 33.8125
   387 33.5625
   388 34.2500
   389 34.0000
   390 34.3750
   391 34.3750
   392 32.9375
   393 32.2500
   394 30.8750
   395 31.3750
   396 30.3750
   397 29.2500
   398 28.0625
   399 27.6875
   400 26.3750
   401 24.6875
   402 23.4375
   403 21.8125
   404 21.0625
   405 19.5625
   406 17.5000
   407 16.4375
   408 15.2500
   409 14.1250
   410 13.3125
   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 13.3125
   479 13.7500
   480 15.6875
   481 16.1250
   482 17.8125
   483 19.1875
   484 20.3750
   485 21.8750
   486 23.6875
   487 24.7500
   488 26.0000
   489 26.9375
   490 28.2500
   491 28.3750
   492 30.3750
   493 30.7500
   494 30.5625
   495 30.6875
   496 30.8125
   497 30.1250
   498 29.6250
   499 30.1875
   500 30.2500
   501 30.0000
   502 30.1875
   503 29.5625
   504 29.5625
   505 29.0000
   506 29.4375
   507 29.3750
   508 28.8750
   509 27.0625
   510 26.9375
   511 23.5000
Best regards
konrado5

[konrado5]

Code: [Select]

Tone number      QLN
   0 -100.0000
   1 -141.0000
   2 -143.0000
   3 -142.0000
   4 -143.0000
   5 -143.0000
   6 -143.0000
   7 -143.0000
   8 -143.0000
   9 -143.0000
   10 -143.0000
   11 -143.0000
   12 -143.0000
   13 -143.0000
   14 -142.0000
   15 -142.0000
   16 -142.0000
   17 -142.0000
   18 -141.0000
   19 -138.0000
   20 -140.0000
   21 -138.0000
   22 -138.0000
   23 -136.0000
   24 -135.0000
   25 -132.0000
   26 -131.0000
   27 -130.0000
   28 -129.0000
   29 -127.0000
   30 -126.0000
   31 -126.0000
   32 -132.0000
   33 -129.0000
   34 -127.0000
   35 -124.0000
   36 -124.0000
   37 -122.0000
   38 -121.0000
   39 -121.0000
   40 -120.0000
   41 -120.0000
   42 -119.0000
   43 -119.0000
   44 -118.0000
   45 -119.0000
   46 -118.0000
   47 -118.0000
   48 -118.0000
   49 -118.0000
   50 -118.0000
   51 -118.0000
   52 -118.0000
   53 -118.0000
   54 -119.0000
   55 -118.0000
   56 -118.0000
   57 -119.0000
   58 -118.0000
   59 -117.0000
   60 -118.0000
   61 -117.0000
   62 -118.0000
   63 -118.0000
   64 -114.0000
   65 -117.0000
   66 -117.0000
   67 -117.0000
   68 -117.0000
   69 -117.0000
   70 -117.0000
   71 -116.0000
   72 -116.0000
   73 -117.0000
   74 -117.0000
   75 -117.0000
   76 -116.0000
   77 -116.0000
   78 -116.0000
   79 -116.0000
   80 -116.0000
   81 -116.0000
   82 -115.0000
   83 -115.0000
   84 -116.0000
   85 -116.0000
   86 -116.0000
   87 -116.0000
   88 -114.0000
   89 -116.0000
   90 -116.0000
   91 -116.0000
   92 -116.0000
   93 -115.0000
   94 -116.0000
   95 -115.0000
   96 -115.0000
   97 -115.0000
   98 -116.0000
   99 -115.0000
   100 -115.0000
   101 -115.0000
   102 -115.0000
   103 -115.0000
   104 -114.0000
   105 -115.0000
   106 -115.0000
   107 -115.0000
   108 -115.0000
   109 -114.0000
   110 -114.0000
   111 -115.0000
   112 -110.0000
   113 -116.0000
   114 -116.0000
   115 -116.0000
   116 -117.0000
   117 -117.0000
   118 -117.0000
   119 -117.0000
   120 -117.0000
   121 -117.0000
   122 -118.0000
   123 -117.0000
   124 -117.0000
   125 -117.0000
   126 -116.0000
   127 -116.0000
   128 -116.0000
   129 -116.0000
   130 -116.0000
   131 -116.0000
   132 -116.0000
   133 -115.0000
   134 -116.0000
   135 -116.0000
   136 -115.0000
   137 -115.0000
   138 -116.0000
   139 -116.0000
   140 -117.0000
   141 -116.0000
   142 -115.0000
   143 -116.0000
   144 -115.0000
   145 -116.0000
   146 -116.0000
   147 -116.0000
   148 -115.0000
   149 -116.0000
   150 -117.0000
   151 -117.0000
   152 -117.0000
   153 -117.0000
   154 -118.0000
   155 -118.0000
   156 -117.0000
   157 -117.0000
   158 -118.0000
   159 -117.0000
   160 -117.0000
   161 -118.0000
   162 -118.0000
   163 -117.0000
   164 -117.0000
   165 -118.0000
   166 -117.0000
   167 -118.0000
   168 -118.0000
   169 -118.0000
   170 -118.0000
   171 -118.0000
   172 -117.0000
   173 -117.0000
   174 -118.0000
   175 -117.0000
   176 -117.0000
   177 -118.0000
   178 -117.0000
   179 -116.0000
   180 -117.0000
   181 -117.0000
   182 -117.0000
   183 -118.0000
   184 -117.0000
   185 -117.0000
   186 -117.0000
   187 -118.0000
   188 -118.0000
   189 -117.0000
   190 -117.0000
   191 -117.0000
   192 -117.0000
   193 -117.0000
   194 -117.0000
   195 -117.0000
   196 -117.0000
   197 -117.0000
   198 -117.0000
   199 -117.0000
   200 -116.0000
   201 -116.0000
   202 -116.0000
   203 -115.0000
   204 -116.0000
   205 -116.0000
   206 -115.0000
   207 -115.0000
   208 -115.0000
   209 -115.0000
   210 -114.0000
   211 -114.0000
   212 -114.0000
   213 -114.0000
   214 -113.0000
   215 -113.0000
   216 -113.0000
   217 -113.0000
   218 -113.0000
   219 -113.0000
   220 -112.0000
   221 -112.0000
   222 -112.0000
   223 -112.0000
   224 -112.0000
   225 -113.0000
   226 -112.0000
   227 -113.0000
   228 -114.0000
   229 -114.0000
   230 -113.0000
   231 -115.0000
   232 -115.0000
   233 -115.0000
   234 -115.0000
   235 -115.0000
   236 -115.0000
   237 -116.0000
   238 -116.0000
   239 -116.0000
   240 -115.0000
   241 -115.0000
   242 -116.0000
   243 -116.0000
   244 -117.0000
   245 -117.0000
   246 -117.0000
   247 -118.0000
   248 -118.0000
   249 -118.0000
   250 -118.0000
   251 -117.0000
   252 -118.0000
   253 -118.0000
   254 -118.0000
   255 -118.0000
   256 -118.0000
   257 -119.0000
   258 -118.0000
   259 -119.0000
   260 -119.0000
   261 -119.0000
   262 -118.0000
   263 -119.0000
   264 -119.0000
   265 -119.0000
   266 -119.0000
   267 -119.0000
   268 -118.0000
   269 -118.0000
   270 -118.0000
   271 -118.0000
   272 -118.0000
   273 -117.0000
   274 -117.0000
   275 -115.0000
   276 -117.0000
   277 -117.0000
   278 -117.0000
   279 -117.0000
   280 -118.0000
   281 -117.0000
   282 -117.0000
   283 -117.0000
   284 -117.0000
   285 -117.0000
   286 -116.0000
   287 -117.0000
   288 -116.0000
   289 -116.0000
   290 -116.0000
   291 -117.0000
   292 -116.0000
   293 -117.0000
   294 -117.0000
   295 -117.0000
   296 -117.0000
   297 -117.0000
   298 -117.0000
   299 -116.0000
   300 -117.0000
   301 -117.0000
   302 -116.0000
   303 -117.0000
   304 -117.0000
   305 -117.0000
   306 -118.0000
   307 -117.0000
   308 -117.0000
   309 -118.0000
   310 -118.0000
   311 -118.0000
   312 -119.0000
   313 -119.0000
   314 -119.0000
   315 -119.0000
   316 -118.0000
   317 -119.0000
   318 -119.0000
   319 -119.0000
   320 -119.0000
   321 -119.0000
   322 -119.0000
   323 -120.0000
   324 -120.0000
   325 -120.0000
   326 -120.0000
   327 -121.0000
   328 -121.0000
   329 -122.0000
   330 -121.0000
   331 -122.0000
   332 -122.0000
   333 -122.0000
   334 -121.0000
   335 -121.0000
   336 -122.0000
   337 -122.0000
   338 -123.0000
   339 -122.0000
   340 -122.0000
   341 -123.0000
   342 -124.0000
   343 -124.0000
   344 -123.0000
   345 -124.0000
   346 -124.0000
   347 -124.0000
   348 -124.0000
   349 -124.0000
   350 -124.0000
   351 -124.0000
   352 -125.0000
   353 -125.0000
   354 -124.0000
   355 -125.0000
   356 -126.0000
   357 -126.0000
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   359 -127.0000
   360 -127.0000
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   365 -128.0000
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   367 -128.0000
   368 -128.0000
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   377 -131.0000
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   379 -130.0000
   380 -130.0000
   381 -131.0000
   382 -131.0000
   383 -131.0000
   384 -131.0000
   385 -131.0000
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   387 -131.0000
   388 -131.0000
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   390 -132.0000
   391 -133.0000
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   414 -145.0000
   415 -145.0000
   416 -145.0000
   417 -144.0000
   418 -145.0000
   419 -145.0000
   420 -145.0000
   421 -144.0000
   422 -144.0000
   423 -144.0000
   424 -145.0000
   425 -145.0000
   426 -145.0000
   427 -145.0000
   428 -144.0000
   429 -145.0000
   430 -144.0000
   431 -145.0000
   432 -145.0000
   433 -145.0000
   434 -145.0000
   435 -145.0000
   436 -145.0000
   437 -145.0000
   438 -145.0000
   439 -145.0000
   440 -145.0000
   441 -145.0000
   442 -146.0000
   443 -145.0000
   444 -145.0000
   445 -145.0000
   446 -144.0000
   447 -145.0000
   448 -146.0000
   449 -145.0000
   450 -145.0000
   451 -145.0000
   452 -145.0000
   453 -145.0000
   454 -145.0000
   455 -146.0000
   456 -145.0000
   457 -146.0000
   458 -145.0000
   459 -145.0000
   460 -145.0000
   461 -145.0000
   462 -146.0000
   463 -146.0000
   464 -146.0000
   465 -146.0000
   466 -146.0000
   467 -146.0000
   468 -146.0000
   469 -146.0000
   470 -145.0000
   471 -146.0000
   472 -146.0000
   473 -146.0000
   474 -146.0000
   475 -146.0000
   476 -145.0000
   477 -146.0000
   478 -146.0000
   479 -145.0000
   480 -146.0000
   481 -146.0000
   482 -145.0000
   483 -146.0000
   484 -145.0000
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   487 -145.0000
   488 -145.0000
   489 -145.0000
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   491 -144.0000
   492 -144.0000
   493 -143.0000
   494 -143.0000
   495 -143.0000
   496 -143.0000
   497 -143.0000
   498 -144.0000
   499 -143.0000
   500 -145.0000
   501 -145.0000
   502 -145.0000
   503 -144.0000
   504 -144.0000
   505 -145.0000
   506 -144.0000
   507 -144.0000
   508 -144.0000
   509 -143.0000
   510 -144.0000
   511 -143.0000

Code: [Select]

Tone number      Hlog
   0 -96.3125
   1 -63.5000
   2 -66.8750
   3 -66.8750
   4 -72.5000
   5 -66.8750
   6 -72.5000
   7 -66.8750
   8 -72.5000
   9 -72.5000
   10 -72.5000
   11 -72.5000
   12 -72.5000
   13 -72.5000
   14 -72.5000
   15 -72.5000
   16 -72.5000
   17 -96.3125
   18 -96.3125
   19 -70.3125
   20 -65.0000
   21 -65.2500
   22 -61.4375
   23 -58.8125
   24 -55.6875
   25 -52.8125
   26 -49.4375
   27 -47.2500
   28 -44.4375
   29 -41.8750
   30 -39.6875
   31 -37.5000
   32 -35.4375
   33 -33.4375
   34 -31.5625
   35 -29.8125
   36 -28.1875
   37 -26.7500
   38 -25.5000
   39 -24.5000
   40 -23.7500
   41 -23.2500
   42 -23.1250
   43 -23.1875
   44 -23.4375
   45 -23.8750
   46 -24.5000
   47 -25.1875
   48 -25.9375
   49 -26.6250
   50 -27.4375
   51 -28.1250
   52 -28.6875
   53 -29.1250
   54 -29.4375
   55 -29.5000
   56 -29.4375
   57 -29.1875
   58 -28.7500
   59 -28.2500
   60 -27.5625
   61 -26.8750
   62 -26.1250
   63 -25.3750
   64 -24.6875
   65 -23.9375
   66 -23.3125
   67 -22.6875
   68 -22.1250
   69 -21.5625
   70 -21.0625
   71 -20.6250
   72 -20.2500
   73 -20.0000
   74 -19.7500
   75 -19.5000
   76 -19.3125
   77 -19.1250
   78 -19.0000
   79 -18.8750
   80 -18.8125
   81 -18.6875
   82 -18.5625
   83 -18.4375
   84 -18.3750
   85 -18.2500
   86 -18.2500
   87 -18.1875
   88 -18.1250
   89 -18.1250
   90 -18.1250
   91 -18.1875
   92 -18.2500
   93 -18.3125
   94 -18.4375
   95 -18.5000
   96 -18.5625
   97 -18.6875
   98 -18.7500
   99 -18.7500
   100 -18.8125
   101 -18.7500
   102 -18.7500
   103 -18.6875
   104 -18.5625
   105 -18.5000
   106 -18.4375
   107 -18.3125
   108 -18.1875
   109 -18.1250
   110 -18.0625
   111 -17.9375
   112 -17.9375
   113 -17.8750
   114 -17.8750
   115 -17.8125
   116 -17.8750
   117 -17.8750
   118 -17.9375
   119 -18.0625
   120 -18.1250
   121 -18.1875
   122 -18.3125
   123 -18.4375
   124 -18.5625
   125 -18.7500
   126 -18.8750
   127 -19.0625
   128 -19.2500
   129 -19.5000
   130 -19.7500
   131 -20.0000
   132 -20.1875
   133 -20.4375
   134 -20.6875
   135 -20.8750
   136 -21.1250
   137 -21.3125
   138 -21.5000
   139 -21.6250
   140 -21.7500
   141 -21.8750
   142 -21.9375
   143 -22.0000
   144 -22.0000
   145 -22.0625
   146 -22.0625
   147 -22.0625
   148 -22.1250
   149 -22.1250
   150 -22.1875
   151 -22.2500
   152 -22.3125
   153 -22.3750
   154 -22.5000
   155 -22.6250
   156 -22.7500
   157 -22.8750
   158 -23.0000
   159 -23.1875
   160 -23.3750
   161 -23.5625
   162 -23.7500
   163 -23.9375
   164 -24.2500
   165 -24.4375
   166 -24.6875
   167 -25.0000
   168 -25.2500
   169 -25.5000
   170 -25.8125
   171 -26.0625
   172 -26.3750
   173 -26.6250
   174 -26.8750
   175 -27.1250
   176 -27.3750
   177 -27.5625
   178 -27.7500
   179 -27.9375
   180 -28.0625
   181 -28.1875
   182 -28.2500
   183 -28.3125
   184 -28.3750
   185 -28.4375
   186 -28.5000
   187 -28.5000
   188 -28.5625
   189 -28.6250
   190 -28.6250
   191 -28.6875
   192 -28.7500
   193 -28.8125
   194 -28.8750
   195 -29.0000
   196 -29.0625
   197 -29.1875
   198 -29.3125
   199 -29.4375
   200 -29.5625
   201 -29.6875
   202 -29.8125
   203 -29.9375
   204 -30.1250
   205 -30.2500
   206 -30.3750
   207 -30.5000
   208 -30.5625
   209 -30.6875
   210 -30.6875
   211 -30.6875
   212 -30.6875
   213 -30.6875
   214 -30.6250
   215 -30.5625
   216 -30.5000
   217 -30.3750
   218 -30.3125
   219 -30.1875
   220 -30.0000
   221 -29.8750
   222 -29.7500
   223 -29.6250
   224 -29.5000
   225 -29.4375
   226 -29.3125
   227 -29.1875
   228 -29.0625
   229 -29.0000
   230 -28.8750
   231 -28.8125
   232 -28.7500
   233 -28.6250
   234 -28.5625
   235 -28.5000
   236 -28.4375
   237 -28.4375
   238 -28.3750
   239 -28.3125
   240 -28.3125
   241 -28.3125
   242 -28.3125
   243 -28.3125
   244 -28.3125
   245 -28.3125
   246 -28.3125
   247 -28.3750
   248 -28.4375
   249 -28.4375
   250 -28.5000
   251 -28.5625
   252 -28.6250
   253 -28.6875
   254 -28.7500
   255 -28.8125
   256 -28.8750
   257 -28.9375
   258 -29.0000
   259 -29.0625
   260 -29.1250
   261 -29.1875
   262 -29.2500
   263 -29.2500
   264 -29.2500
   265 -29.2500
   266 -29.2500
   267 -29.2500
   268 -29.2500
   269 -29.1875
   270 -29.1875
   271 -29.1250
   272 -29.0625
   273 -29.0625
   274 -29.0000
   275 -29.0000
   276 -28.9375
   277 -28.8750
   278 -28.8750
   279 -28.8750
   280 -28.8750
   281 -28.8750
   282 -28.8750
   283 -28.8750
   284 -28.8750
   285 -28.9375
   286 -29.0000
   287 -29.0625
   288 -29.1250
   289 -29.1875
   290 -29.2500
   291 -29.3750
   292 -29.4375
   293 -29.5625
   294 -29.6875
   295 -29.8125
   296 -29.8750
   297 -30.0000
   298 -30.1875
   299 -30.3125
   300 -30.4375
   301 -30.5000
   302 -30.6250
   303 -30.7500
   304 -30.9375
   305 -30.9375
   306 -31.1250
   307 -31.1250
   308 -31.1875
   309 -31.3125
   310 -31.3125
   311 -31.3125
   312 -31.4375
   313 -31.4375
   314 -31.5000
   315 -31.6250
   316 -31.6250
   317 -31.6250
   318 -31.7500
   319 -31.8125
   320 -31.8750
   321 -32.0000
   322 -32.0625
   323 -32.1250
   324 -32.3125
   325 -32.3750
   326 -32.4375
   327 -32.6875
   328 -32.8125
   329 -32.8750
   330 -33.1875
   331 -33.2500
   332 -33.3750
   333 -33.6250
   334 -33.7500
   335 -33.8750
   336 -34.1250
   337 -34.2500
   338 -34.3750
   339 -34.6250
   340 -34.7500
   341 -34.9375
   342 -35.0625
   343 -35.1250
   344 -35.3750
   345 -35.5000
   346 -35.5625
   347 -35.8125
   348 -35.8750
   349 -36.0000
   350 -36.2500
   351 -36.3750
   352 -36.5000
   353 -36.7500
   354 -36.8750
   355 -36.9375
   356 -37.1875
   357 -37.3750
   358 -37.4375
   359 -37.7500
   360 -37.8750
   361 -38.0625
   362 -38.2500
   363 -38.4375
   364 -38.5625
   365 -38.7500
   366 -38.8750
   367 -39.1250
   368 -39.3750
   369 -39.5625
   370 -39.6875
   371 -40.0000
   372 -40.1250
   373 -40.2500
   374 -40.5000
   375 -40.6875
   376 -40.8125
   377 -41.0625
   378 -41.1875
   379 -41.3750
   380 -41.5000
   381 -41.6875
   382 -41.8750
   383 -41.8125
   384 -41.9375
   385 -42.1875
   386 -42.2500
   387 -42.2500
   388 -42.3125
   389 -42.3750
   390 -42.2500
   391 -42.3750
   392 -42.3125
   393 -42.1875
   394 -42.2500
   395 -42.0625
   396 -41.9375
   397 -41.9375
   398 -41.7500
   399 -41.6875
   400 -41.5625
   401 -41.5625
   402 -41.3125
   403 -41.1875
   404 -41.3125
   405 -41.0625
   406 -41.2500
   407 -41.1875
   408 -41.5000
   409 -41.3750
   410 -40.6875
   411 -40.0625
   412 -38.9375
   413 -40.3125
   414 -41.8125
   415 -40.7500
   416 -39.8125
   417 -41.8125
   418 -39.2500
   419 -39.7500
   420 -39.2500
   421 -41.7500
   422 -39.7500
   423 -42.8125
   424 -39.7500
   425 -41.8125
   426 -41.8125
   427 -41.8125
   428 -42.7500
   429 -41.8125
   430 -41.7500
   431 -41.8125
   432 -41.8125
   433 -42.8125
   434 -41.8125
   435 -41.8125
   436 -42.8125
   437 -41.8125
   438 -42.8125
   439 -41.8125
   440 -41.8125
   441 -42.7500
   442 -41.8125
   443 -41.8125
   444 -42.7500
   445 -39.7500
   446 -42.7500
   447 -41.8125
   448 -41.8125
   449 -42.7500
   450 -41.8125
   451 -41.8125
   452 -41.8125
   453 -41.8125
   454 -48.8125
   455 -41.8125
   456 -41.8125
   457 -42.7500
   458 -45.8125
   459 -48.8125
   460 -48.8125
   461 -45.8125
   462 -42.7500
   463 -45.8125
   464 -42.8125
   465 -41.8125
   466 -45.8125
   467 -42.7500
   468 -47.1250
   469 -44.6250
   470 -47.1250
   471 -45.6250
   472 -46.1875
   473 -46.5625
   474 -49.0625
   475 -46.3750
   476 -47.0000
   477 -47.8125
   478 -47.8750
   479 -48.3750
   480 -47.8125
   481 -48.9375
   482 -48.5000
   483 -48.8125
   484 -48.5000
   485 -49.0000
   486 -49.0625
   487 -48.8750
   488 -49.0625
   489 -49.6250
   490 -49.3750
   491 -49.7500
   492 -49.7500
   493 -49.6875
   494 -49.9375
   495 -50.0625
   496 -50.1250
   497 -50.1250
   498 -50.1875
   499 -50.5000
   500 -50.3125
   501 -50.4375
   502 -50.5625
   503 -50.5625
   504 -50.8125
   505 -50.8125
   506 -50.9375
   507 -50.7500
   508 -50.9375
   509 -51.0000
   510 -50.6250
   511 -51.3125

[burakkucat]

Taking copies of the raw data that you have provided and examining it convinces me that, for the 1.8 - 2.0 MHz frequency band, either there is no signal input to the modem's receive circuitry or that modem's receive circuitry is held in a muted state.

Plotting the three graphs (attached below) allows me to see that data in graphs of my own making. 

I really do not know what else to say! 

[konrado5]

either there is no signal input to the modem's receive circuitry or that modem's receive circuitry is held in a muted state.

Is it possible on DSLAM there are very specific PSD masks that 410-477 tones have very low power output (sometimes tone 410 and 477 enabled)?

It does not show a smooth decay versus frequency that we would normally expect to see. The undulations may be the result of impedance mismatch, where different sections of cable (of different characteristics) have been joined together.

How report it to my ISP?

Best regards
konrado5

[burakkucat]

Is it possible on DSLAM there are very specific PSD masks that 410-477 tones have very low power output (sometimes tone 410 and 477 enabled)?

I had considered that option but discounted it. Why? Look at the Qln graph. For those tones, the graph is registering nothing. No signal, no real noise. Hence my proposal that the modem's receiver is muted rather than attenuation of the DSLAM's transmitter with a PSD mask.

It does not show a smooth decay versus frequency that we would normally expect to see. The undulations may be the result of impedance mismatch, where different sections of cable (of different characteristics) have been joined together.

How report it to my ISP?

What I have proposed is just a suggestion. I do not know, for sure. In all seriousness, I do not think it is worth reporting. They might just say to you "That is normal for telephone circuits in Poland."

[konrado5]

burakkcucat: As far I understood you, I should buy new router. Is my router damaged? However, I've noticed my QLN is -145 both for eg. 415 tone and 500 tone, however on 500 tone I have SNR 30.2500 and 7 bits. QLN graph register similarly even for end used tones.

Best regards
konrado5

[kitz]

The thing is konrado, no-one knows for sure.
Yes there are some oddities in your line, but not anything that we can point to and say "The problem is xxxx"  Most lines will have some quirks or other yet the line functions pretty well.

Weve made suggestions in the past about the router, but even if you get another there is going to be no guarantee.

We also made suggestions about the doorbell since you say youve noticed HECs when it coincides with it being rung, yet you say you cant move the cable because it will cause pock marks in the wall.

I think weve just about exhausted all what we can do or say, and I agree with b*cat that the ISP is likely to say its normal operation of the line.

[konrado5]

kitz: Thank you for reply. Could you recommend any other forum on which someone could say me something more on the basis of QLN, Hlog?

Do you changed your believe after barukkcat analised my QLN? You said me that probably amateur radio interfere with my ADSL connection.

We also made suggestions about the doorbell since you say youve noticed HECs when it coincides with it being rung, yet you say you cant move the cable because it will cause pock marks in the wall.

Do you believe my doorbell interfere with my ADSL connection even when nobody rings?

Best regards
konrado5

[konrado5]

Perhaps following screenshot will be helpful. I have this connection from 33 days. Errored seconds per 12 hours is 50-90. SNR margin is 3.3-4.2 dB (rarely ever 4.8 dB). I have fast path, no impulse noise protection.

It does not show a smooth decay versus frequency that we would normally expect to see. The undulations may be the result of impedance mismatch, where different sections of cable (of different characteristics) have been joined together.

What issues can be caused by this? Is it possible it is related only to my home installation?

Best regards
konrado5

[konrado5]

I think about buying new router. What do you think about Negear DGN2200? Is it good to monitor statistics?

Best regards
konrado5

[roseway]

I have one, and I found its performance very poor. Also, monitoring the statistics is problematic, because you have to run a special Netgear program to enable the telnet interface, and this seems to be unreliable.

It's difficult to recommend a 'best' modem/router, because performance varies so much on different lines. But my personal favourite (by a long distance) is the Billion 7800DXL. This is an expensive model, but I find it to be very fast and very stable, and it has more features than any other model which I've seen. It has a modern Broadcom DSL chip, and comprehensive monitoring by the telnet interface is available.

All this is of course only my personal opinion.

[konrado5]

Unfortunately in Poland Billion routers are not selled.