Fréquence de 300 kHz, soit 15,0 dB/km pour une paire
torsadée de 4/10 de mm.
Pour 2 km : 2,0 km * 15,0 dB/km = 30,0 dB
Diamètre du
fil (mm) |
ab (dB/km) à 440
Hz |
ah (dB/km) à
300 kHz |
k = ah/ab |
0,4 |
1,19 |
15,0 |
12,56 |
0,5 |
0,96 |
12,4 |
12,86 |
0,6 |
0,77 |
10,3 |
13,36 |
0,8 |
0,60 |
7,9 |
13,14 |
Atténuation
|
Débit
ADSL2+ |
Débit ADSL |
3,342 dB |
25,599 Mb/s |
8,192 Mb/s |
4,995 dB |
25,591 Mb/s |
8,192 Mb/s |
5,115 dB |
25,590 Mb/s |
8,192 Mb/s |
7,44 dB |
25,535 Mb/s |
8,190 Mb/s |
8,94 dB |
25,440 Mb/s |
8,186 Mb/s |
9,66 dB |
25,367 Mb/s |
8,183 Mb/s |
10,66 dB |
25,228 Mb/s |
8,178 Mb/s |
11,28 dB |
25,117 Mb/s |
8,173 Mb/s |
12,03 dB |
24,953 Mb/s |
8,166 Mb/s |
13,29 dB |
24,601 Mb/s |
8,150 Mb/s |
14,04 dB |
24,345 Mb/s |
8,137 Mb/s |
15,07 dB |
23,939 Mb/s |
8,114 Mb/s |
16,08 dB |
23,484 Mb/s |
8,085 Mb/s |
17,01 dB |
23,020 Mb/s |
8,051 Mb/s |
18,22 dB |
22,362 Mb/s |
7,996 Mb/s |
19,91 dB |
21,362 Mb/s |
7,895 Mb/s |
20,76 dB |
20,832 Mb/s |
7,833 Mb/s |
21,15 dB |
20,583 Mb/s |
7,801 Mb/s |
22,59 dB |
19,644 Mb/s |
7,668 Mb/s |
23,19 dB |
19,243 Mb/s |
7,604 Mb/s |
24,48 dB |
18,370 Mb/s |
7,453 Mb/s |
25,17 dB |
17,896 Mb/s |
7,363 Mb/s |
27,06 dB |
16,584 Mb/s |
7,087 Mb/s |
28,32 dB |
15,700 Mb/s |
6,880 Mb/s |
30,20 dB |
14,374 Mb/s |
6,541 Mb/s |
31,47 dB |
13,477 Mb/s |
6,294 Mb/s |
32,78 dB |
12,553 Mb/s |
6,025 Mb/s |
33,269 dB |
12,209 Mb/s |
5,922 Mb/s |
34,125 dB |
11,609 Mb/s |
5,738 Mb/s |
35,31 dB |
10,785 Mb/s |
5,477 Mb/s |
36,75 dB |
9,796 Mb/s |
5,152 Mb/s |
37,06 dB |
9,585 Mb/s |
5,081 Mb/s |
38,91 dB |
8,351 Mb/s |
4,652 Mb/s |
39,23 dB |
8,142 Mb/s |
4,577 Mb/s |
40,20 dB |
7,519 Mb/s |
4,349 Mb/s |
42,96 dB |
5,849 Mb/s |
3,702 Mb/s |
43,09 dB |
5,775 Mb/s |
3,672 Mb/s |
44,04 dB |
5,247 Mb/s |
3,452 Mb/s |
45,7 dB |
4,390 Mb/s |
3,074 Mb/s |
46,13 dB |
4,182 Mb/s |
2,978 Mb/s |
47,39 dB |
3,611 Mb/s |
2,702 Mb/s |
48,13 dB |
3,301 Mb/s |
2,545 Mb/s |
49,965 dB |
2,619 Mb/s |
2,171 Mb/s |
50,01 dB |
2,604 Mb/s |
2,163 Mb/s |
51,39 dB |
2,171 Mb/s |
1,901 Mb/s |
52,48 dB |
1,873 Mb/s |
1,708 Mb/s |
53,85 dB |
1,551 Mb/s |
1,483 Mb/s |
54,48 dB |
1,421 Mb/s |
1,386 Mb/s |
55,5 dB |
1,232 Mb/s |
1,239 Mb/s |
60,3 dB |
0,627 Mb/s |
0,700 Mb/s |
62,85 dB |
0,440 Mb/s |
0,507 Mb/s |
64,85 dB |
0,391 Mb/s |
0,334 Mb/s |
65,19 dB |
0,320 Mb/s |
0,375 Mb/s |
Atténuation |
diamètre 0,4mm |
diamètre 0,5mm |
diamètre 0,6mm |
diamètre 0,8mm |
0 dB |
0 m |
0 m |
0 m |
0 m |
1 dB |
67 m |
81 m |
97 m |
127 m |
2 dB |
133 m |
161 m |
194 m |
253 m |
3 dB |
200 m |
242 m |
291 m |
380 m |
4 dB |
267 m |
323 m |
388 m |
506 m |
5 dB |
333 m |
403 m |
485 m |
633 m |
6 dB |
400 m |
484 m |
583 m |
759 m |
7 dB |
467 m |
565 m |
680 m |
886 m |
8 dB |
533 m |
645 m |
777 m |
1013 m |
9 dB |
600 m |
726 m |
874 m |
1139 m |
10 dB |
667 m |
806 m |
971 m |
1266 m |
11 dB |
733 m |
887 m |
1068 m |
1392 m |
12 dB |
800 m |
968 m |
1165 m |
1519 m |
13 dB |
867 m |
1048 m |
1262 m |
1646 m |
14 dB |
933 m |
1129 m |
1359 m |
1772 m |
15 dB |
1000 m |
1210 m |
1456 m |
1899 m |
16 dB |
1067 m |
1290 m |
1553 m |
2025 m |
17 dB |
1133 m |
1371 m |
1650 m |
2152 m |
18 dB |
1200 m |
1452 m |
1748 m |
2278 m |
19 dB |
1267 m |
1532 m |
1845 m |
2405 m |
20 dB |
1333 m |
1613 m |
1942 m |
2532 m |
21 dB |
1400 m |
1694 m |
2039 m |
2658 m |
22 dB |
1467 m |
1774 m |
2136 m |
2785 m |
23 dB |
1533 m |
1855 m |
2233 m |
2911 m |
24 dB |
1600 m |
1935 m |
2330 m |
3038 m |
25 dB |
1667 m |
2016 m |
2427 m |
3165 m |
26 dB |
1733 m |
2097 m |
2524 m |
3291 m |
27 dB |
1800 m |
2177 m |
2621 m |
3418 m |
28 dB |
1867 m |
2258 m |
2718 m |
3544 m |
29 dB |
1933 m |
2339 m |
2816 m |
3671 m |
30 dB |
2000 m |
2419 m |
2913 m |
3797 m |
31 dB |
2067 m |
2500 m |
3010 m |
3924 m |
32 dB |
2133 m |
2581 m |
3107 m |
4051 m |
33 dB |
2200 m |
2661 m |
3204 m |
4177 m |
34 dB |
2267 m |
2742 m |
3301 m |
4304 m |
35 dB |
2333 m |
2823 m |
3398 m |
4430 m |
36 dB |
2400 m |
2903 m |
3495 m |
4557 m |
37 dB |
2467 m |
2984 m |
3592 m |
4684 m |
38 dB |
2533 m |
3065 m |
3689 m |
4810 m |
39 dB |
2600 m |
3145 m |
3786 m |
4937 m |
40 dB |
2667 m |
3226 m |
3883 m |
5063 m |
41 dB |
2733 m |
3306 m |
3981 m |
5190 m |
42 dB |
2800 m |
3387 m |
4078 m |
5316 m |
43 dB |
2867 m |
3468 m |
4175 m |
5443 m |
44 dB |
2933 m |
3548 m |
4272 m |
5570 m |
45 dB |
3000 m |
3629 m |
4369 m |
5696 m |
46 dB |
3067 m |
3710 m |
4466 m |
5823 m |
47 dB |
3133 m |
3790 m |
4563 m |
5949 m |
48 dB |
3200 m |
3871 m |
4660 m |
6076 m |
49 dB |
3267 m |
3952 m |
4757 m |
6203 m |
50 dB |
3333 m |
4032 m |
4854 m |
6329 m |
51 dB |
3400 m |
4113 m |
4951 m |
6456 m |
52 dB |
3467 m |
4194 m |
5049 m |
6582 m |
53 dB |
3533 m |
4274 m |
5146 m |
6709 m |
54 dB |
3600 m |
4355 m |
5243 m |
6835 m |
55 dB |
3667 m |
4435 m |
5340 m |
6962 m |
56 dB |
3733 m |
4516 m |
5437 m |
7089 m |
57 dB |
3800 m |
4597 m |
5534 m |
7215 m |
58 dB |
3867 m |
4677 m |
5631 m |
7342 m |
59 dB |
3933 m |
4758 m |
5728 m |
7468 m |
60 dB |
4000 m |
4839 m |
5825 m |
7595 m |
61 dB |
4067 m |
4919 m |
5922 m |
7722 m |
62 dB |
4133 m |
5000 m |
6019 m |
7848 m |
63 dB |
4200 m |
5081 m |
6117 m |
7975 m |
64 dB |
4267 m |
5161 m |
6214 m |
8101 m |
65 dB |
4333 m |
5242 m |
6311 m |
8228 m |
66 dB |
4400 m |
5323 m |
6408 m |
8354 m |
67 dB |
4467 m |
5403 m |
6505 m |
8481 m |
68 dB |
4533 m |
5484 m |
6602 m |
8608 m |
69 dB |
4600 m |
5565 m |
6699 m |
8734 m |
70 dB |
4667 m |
5645 m |
6796 m |
8861 m |
71 dB |
4733 m |
5726 m |
6893 m |
8987 m |
72 dB |
4800 m |
5806 m |
6990 m |
9114 m |
73 dB |
4867 m |
5887 m |
7087 m |
9241 m |
74 dB |
4933 m |
5968 m |
7184 m |
9367 m |
75 dB |
5000 m |
6048 m |
7282 m |
9494 m |
76 dB |
5067 m |
6129 m |
7379 m |
9620 m |
77 dB |
5133 m |
6210 m |
7476 m |
9747 m |
78 dB |
5200 m |
6290 m |
7573 m |
9873 m |
79 dB |
5267 m |
6371 m |
7670 m |
10000 m |
80 dB |
5333 m |
6452 m |
7767 m |
10127 m |
Distance (Ø 0,4) |
Atténuation |
Distance (Ø 0,5) |
Distance (Ø 0,6) |
Distance (Ø 0,8) |
0 m |
0,0 dB |
0 m |
0 m |
0 m |
100 m |
1,5 dB |
121 m |
146 m |
190 m |
200 m |
3,0 dB |
242 m |
291 m |
380 m |
300 m |
4,5 dB |
363 m |
437 m |
570 m |
400 m |
6,0 dB |
484 m |
583 m |
759 m |
500 m |
7,5 dB |
605 m |
728 m |
949 m |
600 m |
9,0 dB |
726 m |
874 m |
1139 m |
700 m |
10,5 dB |
847 m |
1019 m |
1329 m |
800 m |
12,0 dB |
968 m |
1165 m |
1519 m |
900 m |
13,5 dB |
1089 m |
1311 m |
1709 m |
1000 m |
15,0 dB |
1210 m |
1456 m |
1899 m |
1100 m |
16,5 dB |
1331 m |
1602 m |
2089 m |
1200 m |
18,0 dB |
1452 m |
1748 m |
2278 m |
1300 m |
19,5 dB |
1573 m |
1893 m |
2468 m |
1400 m |
21,0 dB |
1694 m |
2039 m |
2658 m |
1500 m |
22,5 dB |
1815 m |
2184 m |
2848 m |
1600 m |
24,0 dB |
1935 m |
2330 m |
3038 m |
1700 m |
25,5 dB |
2056 m |
2476 m |
3228 m |
1800 m |
27,0 dB |
2177 m |
2621 m |
3418 m |
1900 m |
28,5 dB |
2298 m |
2767 m |
3608 m |
2000 m |
30,0 dB |
2419 m |
2913 m |
3797 m |
2100 m |
31,5 dB |
2540 m |
3058 m |
3987 m |
2200 m |
33,0 dB |
2661 m |
3204 m |
4177 m |
2300 m |
34,5 dB |
2782 m |
3350 m |
4367 m |
2400 m |
36,0 dB |
2903 m |
3495 m |
4557 m |
2500 m |
37,5 dB |
3024 m |
3641 m |
4747 m |
2600 m |
39,0 dB |
3145 m |
3786 m |
4937 m |
2700 m |
40,5 dB |
3266 m |
3932 m |
5127 m |
2800 m |
42,0 dB |
3387 m |
4078 m |
5316 m |
2900 m |
43,5 dB |
3508 m |
4223 m |
5506 m |
3000 m |
45,0 dB |
3629 m |
4369 m |
5696 m |
3100 m |
46,5 dB |
3750 m |
4515 m |
5886 m |
3200 m |
48,0 dB |
3871 m |
4660 m |
6076 m |
3300 m |
49,5 dB |
3992 m |
4806 m |
6266 m |
3400 m |
51,0 dB |
4113 m |
4951 m |
6456 m |
3500 m |
52,5 dB |
4234 m |
5097 m |
6646 m |
3600 m |
54,0 dB |
4355 m |
5243 m |
6835 m |
3700 m |
55,5 dB |
4476 m |
5388 m |
7025 m |
3800 m |
57,0 dB |
4597 m |
5534 m |
7215 m |
3900 m |
58,5 dB |
4718 m |
5680 m |
7405 m |
4000 m |
60,0 dB |
4839 m |
5825 m |
7595 m |
4100 m |
61,5 dB |
4960 m |
5971 m |
7785 m |
4200 m |
63,0 dB |
5081 m |
6117 m |
7975 m |
4300 m |
64,5 dB |
5202 m |
6262 m |
8165 m |
4400 m |
66,0 dB |
5323 m |
6408 m |
8354 m |
4500 m |
67,5 dB |
5444 m |
6553 m |
8544 m |
4600 m |
69,0 dB |
5565 m |
6699 m |
8734 m |
4700 m |
70,5 dB |
5685 m |
6845 m |
8924 m |
4800 m |
72,0 dB |
5806 m |
6990 m |
9114 m |
4900 m |
73,5 dB |
5927 m |
7136 m |
9304 m |
5000 m |
75,0 dB |
6048 m |
7282 m |
9494 m |
5100 m |
76,5 dB |
6169 m |
7427 m |
9684 m |
5200 m |
78,0 dB |
6290 m |
7573 m |
9873 m |
5300 m |
79,5 dB |
6411 m |
7718 m |
10063 m |
5400 m |
81,0 dB |
6532 m |
7864 m |
10253 m |
5500 m |
82,5 dB |
6653 m |
8010 m |
10443 m |
5600 m |
84,0 dB |
6774 m |
8155 m |
10633 m |
5700 m |
85,5 dB |
6895 m |
8301 m |
10823 m |
5800 m |
87,0 dB |
7016 m |
8447 m |
11013 m |
5900 m |
88,5 dB |
7137 m |
8592 m |
11203 m |
6000 m |
90,0 dB |
7258 m |
8738 m |
11392 m |