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Line Attenuation in VDSL...

Line Attenuation in VDSL2 and xPON

Created: Jul 20, 2021 08:47:54Latest reply: Jul 20, 2021 09:11:49 377 2 0 0 0

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Hi,

What is line attenuation in VDSL2 and xPON?

Thanks.

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hemin88

Author Created Jul 20, 2021 09:11:49

Hi,

The VDSL2 standard defines a wide range of profiles. Profile comparison table:

Profile	Bandwidth (MHz)	Number of total carriers	Maximum aggregate downstream transmit power (dBm)	Max. downstream throughput (Mbit/s)	Max. upstream throughput (Mbit/s)
8a	8.832	2048	17.5	50	16
8b	8.832	2048	20.5	50	16
8c	8.5	1972	11.5	50	16
8d	8.832	2048	14.5	50	16
12a	12	2783	14.5	68	22
12b	12	2783	14.5	68	22
17a	17.664	4096	14.5	100	50
30a	30	3479	14.5	200	100

Abd the line attenuation (loss) and the corresponding attainable ADSL/ADSL2+ speeds:

Line loss (dB)	Line length (km)	ADSL2/2+ speed (Mbps)	ADSL speed (Mbps)
1	0.07	24	8
2	0.15	24	8
3	0.22	24	8
4	0.29	24	8
5	0.36	24	8
6	0.43	24	8
7	0.51	24	8
8	0.58	23.9	8
9	0.65	23.8	8
10	0.72	23.7	8
11	0.8	23.5	8
12	0.87	23.3	8
13	0.94	23	8
14	1.01	22.7	8
15	1.09	22.4	8
16	1.16	22.1	8
17	1.23	21.7	8
18	1.3	21.4	8
19	1.38	21	8
20	1.45	20.6	8
21	1.52	20.2	8
22	1.59	19.7	8
23	1.67	19.3	8
24	1.74	18.8	8
25	1.81	18.2	8
26	1.88	17.6	8
27	1.96	16.8	8
28	2.03	16.2	8
29	2.1	15.7	8
30	2.17	15	8
31	2.25	14.4	8
32	2.32	13.9	7.9
33	2.39	13.4	7.9
34	2.46	12.9	7.9
35	2.53	12.3	7.8
36	2.61	11.8	7.8
37	2.68	11.2	7.7
38	2.75	10.5	7.5
39	2.82	10	7.3
40	2.9	9.5	7.1
41	2.97	9	6.9
42	3.04	8.5	6.7
43	3.11	8	6.5
44	3.19	7.5	6.2
45	3.26	7.1	5.8
46	3.33	6.7	5.6
47	3.4	6.3	5.4
48	3.48	6	5.2
49	3.55	5.6	5
50	3.62	5.3	4.8
51	3.69	5	4.6
52	3.77	4.7	4.4
53	3.84	4.4	4.2
54	3.91	4.2	4
55	3.98	3.9	3.8
56	4.06	3.7	3.6
57	4.13	3.4	3.4
58	4.2	3.2	3.2
59	4.27	2.9	2.9
60	4.35	2.7	2.7
61	4.42	2.5	2.5
62	4.49	2.3	2.3
63	4.56	2.1	2.1
64	4.63	2	2
65	4.71	1.8	1.8
66	4.78	1.7	1.6
67	4.85	1.6	1.4
68	4.92	1.5	1.2
69	5	1.4	1
70	5.07	1.3	0.8

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Nino_Chou Admin Created Jul 20, 2021 08:49:25

Hello, friend!
It's nice to meet you in the community.
We're working on getting the right answer for you.

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hemin88

Author Created Jul 20, 2021 09:11:49

Hi,

The VDSL2 standard defines a wide range of profiles. Profile comparison table:

Profile	Bandwidth (MHz)	Number of total carriers	Maximum aggregate downstream transmit power (dBm)	Max. downstream throughput (Mbit/s)	Max. upstream throughput (Mbit/s)
8a	8.832	2048	17.5	50	16
8b	8.832	2048	20.5	50	16
8c	8.5	1972	11.5	50	16
8d	8.832	2048	14.5	50	16
12a	12	2783	14.5	68	22
12b	12	2783	14.5	68	22
17a	17.664	4096	14.5	100	50
30a	30	3479	14.5	200	100

Abd the line attenuation (loss) and the corresponding attainable ADSL/ADSL2+ speeds:

Line loss (dB)	Line length (km)	ADSL2/2+ speed (Mbps)	ADSL speed (Mbps)
1	0.07	24	8
2	0.15	24	8
3	0.22	24	8
4	0.29	24	8
5	0.36	24	8
6	0.43	24	8
7	0.51	24	8
8	0.58	23.9	8
9	0.65	23.8	8
10	0.72	23.7	8
11	0.8	23.5	8
12	0.87	23.3	8
13	0.94	23	8
14	1.01	22.7	8
15	1.09	22.4	8
16	1.16	22.1	8
17	1.23	21.7	8
18	1.3	21.4	8
19	1.38	21	8
20	1.45	20.6	8
21	1.52	20.2	8
22	1.59	19.7	8
23	1.67	19.3	8
24	1.74	18.8	8
25	1.81	18.2	8
26	1.88	17.6	8
27	1.96	16.8	8
28	2.03	16.2	8
29	2.1	15.7	8
30	2.17	15	8
31	2.25	14.4	8
32	2.32	13.9	7.9
33	2.39	13.4	7.9
34	2.46	12.9	7.9
35	2.53	12.3	7.8
36	2.61	11.8	7.8
37	2.68	11.2	7.7
38	2.75	10.5	7.5
39	2.82	10	7.3
40	2.9	9.5	7.1
41	2.97	9	6.9
42	3.04	8.5	6.7
43	3.11	8	6.5
44	3.19	7.5	6.2
45	3.26	7.1	5.8
46	3.33	6.7	5.6
47	3.4	6.3	5.4
48	3.48	6	5.2
49	3.55	5.6	5
50	3.62	5.3	4.8
51	3.69	5	4.6
52	3.77	4.7	4.4
53	3.84	4.4	4.2
54	3.91	4.2	4
55	3.98	3.9	3.8
56	4.06	3.7	3.6
57	4.13	3.4	3.4
58	4.2	3.2	3.2
59	4.27	2.9	2.9
60	4.35	2.7	2.7
61	4.42	2.5	2.5
62	4.49	2.3	2.3
63	4.56	2.1	2.1
64	4.63	2	2
65	4.71	1.8	1.8
66	4.78	1.7	1.6
67	4.85	1.6	1.4
68	4.92	1.5	1.2
69	5	1.4	1
70	5.07	1.3	0.8

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