Here are some real sync rates (as measured using client-side modem diagnostics). Many variables (cable gauge, interference levels, modem type, etc.) affect sync rate, so your mileage may vary, this is meant only as a guide.
| Loop Length (MLT Test) |
Looptype | RateUp (Kbps) |
RateDown (Kbps) |
AttainUp (Kbps) |
AttainDown (Kbps) |
SNRUp | SNRDown | AttenUp | AttenDown | PwrUp | PwrDown |
| 2200 | 256 | 1472 | 752 | 8177 | 28.0 | 19.0 | 9.0 | 6.0 | 2.5 | 9 | |
| 3800 | 256 | 1472 | 800 | 7360 | 27.5 | 21.0 | 18.5 | 11.5 | 3.0 | 12.5 | |
| 5600 | copper | 256 | 1472 | 756 | 6690 | 20.0 | 20.0 | 27.0 | 15.5 | 2.0 | 11.5 |
| 5700 | 256 | 1472 | 800 | 7747 | 27.5 | 22.0 | 29.5 | 19.0 | 3.0 | 12.5 | |
| 6000 | Alcatel 1000 | 256 | 1472 | 752 | 7360 | 23 | 23 | 16 | 26 | 2 | 12 |
| 6300 | 256 | 1472 | 752 | 6133 | 19.0 | 20.0 | 27.0 | 15.5 | 2.5 | 11 | |
| 6700 | 256 | 1472 | 775 | 6133 | 21.0 | 20.0 | 26.0 | 12.5 | 3.0 | 11.5 | |
| 7600 | copper | 256 | 1472 | 800 | 4906 | 13.0 | 21.0 | 36.0 | 22.5 | 3.0 | 9 |
| 9500 | 256 | 1472 | 624 | 4600 | 12.5 | 13.0 | 45.0 | 29.5 | 2.0 | 8 | |
| 9500 | 256 | 1472 | 775 | 4748 | 13.0 | 19.0 | 45.5 | 30.5 | 2.5 | 8.5 | |
| 9900 | 256 | 1472 | 775 | 5888 | 17.0 | 21.0 | 41.0 | 27.0 | 3.0 | 10.5 | |
| 10200 | Alcatel 1000 | 256 | 1472 | 775 | 5888 | 24 | 19 | 27 | 41 | 2 | 10 |
| 10600 | High resistance | 256 | 1472 | 752 | 6400 | 16 | 20 | 42.5 | 25.5 | 3 | 11.5 |
| 10700 | 256 | 1472 | 775 | 2582 | 12.5 | 21.0 | 37.5 | 25.5 | 3.0 | 11.5 | |
| 10900 | 256 | 1472 | 752 | 5257 | 14.5 | 19.0 | 44.5 | 29.5 | 2.5 | 10 | |
| 11600 | 256 | 1472 | 752 | 6133 | 20.5 | 19.0 | 38.5 | 24.5 | 2.5 | 10.5 | |
| 11700 | 256 | 1472 | 4000 | 13.0 | 16.0 | 49.0 | 31.5 | 2.5 | 13.5 | ||
| 12800 | 256 | 1472 | 775 | 5661 | 16.0 | 20.0 | 33.0 | 18.5 | 3.0 | 10 | |
| 13000 | 256 | 1472 | 610 | 1989 | 8.5 | 12.0 | 53.5 | 31.5 | 2.0 | 17.5 | |
| 13600 | 256 | 1472 | 775 | 2582 | 12.5 | 20.0 | 42.5 | 28.5 | |||
| 13600 | copper | 256 | 1472 | 595 | 2676 | 12.5 | 12.0 | 51.5 | 31.5 | 2.5 | 19 |
| 13900 | 256 | 1472 | 581 | 3131 | 12.5 | 12.0 | 50.5 | 31.5 | 3.0 | 13 | |
| 15600 | 256 | 1056 | 609 | 1056 | 6.5 | 12.0 | 58.0 | 31.5 | 2.0 | 16 | |
| 16300 | Bridge lifter?? | 256 | 1472 | 624 | 2016 | 12.5 | 17.0 | 53.0 | 31.5 | 2.0 | 17 |
| 16500 | with noise filter | 256 | 1088 | 624 | 1098 | 5.0 | 13.0 | 56.5 | 31.5 | 2.0 | 18 |
| 17200 | 256 | 640 | 595 | 659 | 10.5 | 15.0 | 58.0 | 31.5 | 1.5 | 15 | |
| 17800 | 256 | 480 | 522 | 500 | 8.5 | 12.0 | 67.5 | 31.5 | 5.5 | 16 | |
| 18400 | put on noise profile | 256 | 1152 | 501 | 1163 | 9.0 | 15.0 | 59.5 | 31.5 | 5.5 | 16.5 |
| 18600 | 256 | 480 | 556 | 494 | 7.0 | 12.0 | 60.5 | 31.5 | 4.0 | 16.5 | |
| 19800 | put on noise profile | 256 | 832 | 465 | 840 | 10.0 | 15.0 | 61.0 | 31.0 | 7.5 | 16 |
| 20300 | 256 | 1152 | 544 | 1238 | 7.0 | 12.0 | 60.5 | 31.5 | 4.5 | 16 | |
| 20900 | 256 | 288 | 350 | 303 | 6 | 10 | 71 | 31.5 | 12 | 15.5 | |
| 16000 | A1000 | 256 | 1440 | ||||||||
| 11000? | 256 | 1472 | 731 | 4205 | 12.5 | 18 | 51.5 | 31.5 | 2.5 | 11.5 | |
| 256 | 1472 | 775 | 6133 | 21.5 | 20 | 35 | 23 | 3 | 11.5 | ||
| 256 | 1472 | 522 | 5661 | 12.5 | 12 | 36.5 | 24.5 | 6 | 10.5 | ||
| on miniram! | 256 | 1472 | 656 | 6690 | 17.5 | 14 | 44.5 | 26 | 2 | 11.5 | |
| 256 | 1472 | 731 | 7009 | 32.5 | 28.0 | 22.5 | 13.5 | 12.0 | 19.5 | ||
| light short | 256 | 1472 | 731 | 1840 | 4.0 | 20.0 | 49.0 | 31.5 | 2.5 | 17 | |
| light ground fault | 256 | 1472 | 656 | 2944 | 12.5 | 14.0 | 53.0 | 31.5 | 2.0 | 12.5 | |
| 256 | 1472 | 640 | 2380 | 8 | 13 | 54 | 31.5 | 2 | 17 | ||
| 17000 | MTU on line!!! | 256 | 800 | 501 | 824 | 6.5 | 12.0 | 63.0 | 31.5 | 2.0 | 16 |
| 5900 | 256 | 1472 | 752.9412 | 7747.368 | 25 | 29 | 17 | 26 | 3 | 11 |