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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? Is it correct? My distance from exchange is probably about 1200 meters.
Below there is SNR on particular tones.
| Text | |
1 23 45 67 89 1011 1213 1415 1617 1819 2021 2223 2425 2627 2829 3031 3233 3435 3637 3839 4041 4243 4445 4647 4849 5051 5253 5455 5657 5859 6061 6263 6465 6667 6869 7071 7273 7475 7677 7879 8081 8283 8485 8687 8889 9091 9293 9495 9697 9899 100101 102103 104105 106107 108109 110111 112113 114115 116117 118119 120121 122123 124125 126127 128129 130131 132133 134135 136137 138139 140141 142143 144145 146147 148149 150151 152153 154155 156157 158159 160161 162163 164165 166167 168169 170171 172173 174175 176177 178179 180181 182183 184185 186187 188189 190191 192193 194195 196197 198199 200201 202203 204205 206207 208209 210211 212213 214215 216217 218219 220221 222223 224225 226227 228229 230231 232233 234235 236237 238239 240241 242243 244245 246247 248249 250251 252253 254255 256257 258259 260261 262263 264265 266267 268269 270271 272273 274275 276277 278279 280281 282283 284285 286287 288289 290291 292293 294295 296297 298299 300301 302303 304305 306307 308309 310311 312313 314315 316317 318319 320321 322323 324325 326327 328329 330331 332333 334335 336337 338339 340341 342343 344345 346347 348349 350351 352353 354355 356357 358359 360361 362363 364365 366367 368369 370371 372373 374375 376377 378379 380381 382383 384385 386387 388389 390391 392393 394395 396397 398399 400401 402403 404405 406407 408409 410411 412413 414415 416417 418419 420421 422423 424425 426427 428429 430431 432433 434435 436437 438439 440441 442443 444445 446447 448449 450451 452453 454455 456457 458459 460461 462463 464465 466467 468469 470471 472473 474475 476477 478479 480481 482483 484485 486487 488489 490491 492493 494495 496497 498499 500501 502503 504505 506507 508509 510511 512513 514515 516 | adsl: ADSL driver and PHY status Status: ShowtimeRetrain Reason: 8000Channel: 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:
| Text | |||||
1 23 45 67 89 1011 1213 1415 1617 1819 2021 2223 2425 2627 2829 3031 3233 3435 3637 3839 4041 4243 4445 4647 4849 5051 5253 5455 5657 5859 6061 6263 6465 6667 6869 7071 7273 7475 7677 7879 8081 8283 8485 8687 8889 9091 9293 9495 9697 9899 100101 102103 104105 106 | adsl: ADSL driver and PHY status Status: ShowtimeRetrain Reason: 8000Channel: FAST, Upstream rate = 1221 Kbps, Downstream rate = 15060 Kbps Link Power State: L0Mode: ADSL2+ Channel: Fast< |
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I've noticed also gap between 411-477. What is happening? Is it correct? My distance from exchange is probably about 1200 meters. Apart from the gap 411-477 the SNR declines with increasing frequency in the way one would expect. 411-477 might be a "notch" to guard against interference with other services, or it may be interference like a radio station taking that chunk out. Have you checked the frequencies against local radio ? |
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I think nobody broadcast radio at this frequency but I'm not sure. Is it possible to be line fault? I'd like to complain my ISP about these interferences.
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Below there is my attenuation for particular tones.
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Looks very like a notch around the 1.7 MHz area
Is it possible you have a very old analogue cordless telephone http://en.wikipedia.org/wiki/Cordless_telephone |
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| The author of the above post is a thinkbroadband staff member. It may not constitute an official statement on behalf of thinkbroadband. | |||||
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Your blank tones 411 to 478 correspond to 1772 kHz to 2061 kHz (1.772 - 2.061 MHz). There are plenty of transmission in that band - Maritime, Aero, Amateur, Geo/Radio Location. Meteorological ... Any of those could be causing problems and remember it will not be just teh spot frequency but there will be a band either side.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ M H C taurus excreta cerebrum vincit |
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I have only cell phone. Router is only device connected to socket.
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If you live in a flat, then the interference could be from a neighbours flat or other property close to the telephone line
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| The author of the above post is a thinkbroadband staff member. It may not constitute an official statement on behalf of thinkbroadband. | |||||
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I don't live in flat.
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