408:
478:
276:
454:
496:-like long-reach performance is one of the key advantages of VDSL2. LR-VDSL2 enabled systems are capable of supporting speeds of around 1–4 Mbit/s (downstream) over distances of 4–5 km (2.5–3 miles), gradually increasing the bit rate up to symmetric 100 Mbit/s as loop-length shortens. This means that VDSL2-based systems, unlike VDSL systems, are not limited to short
232:; ITU-T G.993.2 approved in February 2006) use frequencies of up to 30 MHz to provide data rates exceeding 100 Mbit/s simultaneously in both the upstream and downstream directions. The maximum available bit rate is achieved at a range of about 300 metres (980 ft); performance degrades as the
526:
and standardised in
November 2015 in ITU G.993.2 Amendment 1 as VDSL2 profile 35b. It promises to deliver speeds of up to 300 Mbit/s downstream and 100 Mbit/s upstream on loops shorter than 250 m. On longer loops, Vplus falls back to VDSL2 17a vectoring performance. Vplus uses the same
855:(FEXT) generated by a group of near-end transceivers and interfering with the far-end transceivers of that same group is cancelled. This cancellation takes place between VDSL2 transceivers, not necessarily of the same profile. The technology is analogous to G.INP and Seamless Rate Adaptation (SRA).
445:
on twisted pairs using a bandwidth up to 35 MHz on its latest version. It deteriorates quickly from a theoretical maximum of 350 Mbit/s at source to 100 Mbit/s at 500 m (1640.42 ft) and 50 Mbit/s at 1000 m (3280.84 ft), but degrades at a much slower rate from
535:
The VDSL1 standard has three bandplans: Annex A (Asymmetric BandPlan), Annex B (Symmetric BandPlan) and Annex C (Fx BandPlan). Annex A and Annex B were formerly called Plan 998 and Plan 997 respectively. VDSL1 Annex C is intended for use in Sweden only and it uses a variable separating frequency
1212:
266:
VDSL2 standard is an enhancement to ITU T G.993.1 that supports asymmetric and symmetric transmission at a bidirectional net data rate up to 400 Mbit/s on twisted pairs using a bandwidth up to 35 MHz.
1219:
434:) as Recommendation G.993.2. It was announced as finalized on 27 May 2005, and first published on 17 February 2006. Several corrections and amendments were published from 2007 to 2011.
539:
The VDSL2 standard defines a wide range of profiles that can be used in different VDSL deployment architectures; in the central office, in the cabinet or in the building for example.
397:
536:
between the second downstream band, and the second upstream band. All VDSL1 bandplans have spectrum up to 12 MHz, so the length of the copper loops must be shorter than ADSL.
2152:
263:, which were both 1.5 Mbit/s. Specifically, it explored the feasibility of symmetric and asymmetric data rates exceeding 10 Mbit/s on short phone lines.
1109:
870:
1812:
1380:
527:
tone spacing as VDSL2 17a to allow vectoring across Vplus (35b) and 17a lines, and thus mixed deployments and a smooth introduction of Vplus.
1282:
423:(HDTV) VDSL2 is intended to enable operators and carriers to gradually, flexibly, and cost-efficiently upgrade existing xDSL infrastructure.
1406:
1861:
1339:
458:
1155:
1881:
2147:
1777:
1687:
1611:
1375:
506:(ITU-T G.998.x) may be used to combine multiple wire pairs to increase available capacity, or extend the copper network's reach.
2017:
1637:
884:, which further increases crosstalk and interference resistance and allows for stable internet at home connections at 250
1807:
1620:
1538:
1370:
427:
222:
2157:
1131:
296:
differently depending on the service offering and spectrum regulations. The first-generation VDSL standard specified both
1509:
914:
164:
1401:
847:, describes vectoring for VDSL2. The scope of Recommendation ITU-T G.993.5 is specifically limited to the self-FEXT (
2137:
514:
with wireless networks. This enables network operators to provide faster
Internet access services over long lines.
416:
1243:
1876:
304:(DMT). In 2006, ITU-T standardized VDSL in recommendation G.993.2 which specified only DMT modulation for VDSL2.
297:
1055:
2142:
1697:
1656:
1651:
1416:
1332:
486:
301:
548:
2117:
1977:
1732:
1396:
1117:
1604:
909:
836:
218:
1568:
437:
VDSL2 permits the transmission of asymmetric and symmetric aggregate data rates up to 300+ Mbit/s
420:
206:
2062:
1871:
1325:
843:
standard, "Self-FEXT cancellation (vectoring) for use with VDSL2 transceivers" (2010), also known as
1642:
827:
Vectoring is a transmission method that employs the coordination of line signals for reduction of
1348:
888:
587:
522:
Vplus is a technology to achieve higher speeds over existing VDSL2 networks. It was developed by
438:
293:
279:
186:
160:
1082:
446:
there, and outperforms VDSL. Starting from 1,600 m (1 mi) its performance is equal to
1982:
1597:
507:
960:"ITU-T Recommendation G.993.2: Very high speed digital subscriber line transceivers 2 (VDSL2)"
288:
A VDSL connection uses up to seven frequency bands, so one can allocate the data rate between
1972:
1317:
1308:
892:
859:
603:
442:
289:
190:
17:
1267:
1886:
1578:
934:"ITU-T Recommendation G.993.1: Very high speed digital subscriber line transceivers (VDSL)"
832:
80:
1303:
1015:
8:
1962:
1854:
1837:
1832:
1573:
1453:
205:
to 12 MHz. These rates mean that VDSL is capable of supporting applications such as
1016:"New ITU Standard Delivers 10x ADSL Speeds: Vendors applaud landmark agreement on VDSL2"
591:
875:
852:
848:
104:
1041:
163:(DSL) technologies providing data transmission faster than the earlier standards of
1997:
1192:"G.993.5 : Self-FEXT cancellation (vectoring) for use with VDSL2 transceivers"
998:
881:
407:
282:
1589:
255:
research study. The study searched for potential successors to the then-prevalent
2067:
1497:
1480:
1475:
503:
214:
2082:
2077:
1177:"G.993.2 : Very high speed digital subscriber line transceivers 2 (VDSL2)"
1113:
1042:"G.993.2 : Very high speed digital subscriber line transceivers 2 (VDSL2)"
880:
is an evolution of the vectoring technology invented and widely implemented by
523:
980:
2131:
2097:
2072:
984:
210:
2092:
2087:
1176:
563:
477:
415:
VDSL2 is an enhancement to VDSL designed to support the wide deployment of
217:, over a single connection. VDSL is deployed over existing wiring used for
194:
1191:
959:
933:
858:
Although technically feasible, as of 2022, vectoring is incompatible with
275:
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1849:
1844:
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1822:
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236:
198:
123:
2046:
2036:
1906:
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1298:
497:
233:
500:
or MTU/MDUs only, but can also be used for medium range applications.
2102:
1421:
1411:
1059:
831:
levels and improvement of performance. It is based on the concept of
828:
482:
470:
466:
453:
396:
252:
248:
221:
and lower-speed DSL connections. This standard was approved by the
1268:"Telekom: Magenta Zuhause XL - Alle Tarifdetails auf teltarif.de!"
1927:
1922:
1747:
1737:
1727:
1543:
1492:
1485:
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1463:
1458:
1108:
Keith
Russell; Paul Spruyt; Stefaan Vanhastel (16 October 2014).
904:
447:
176:
172:
168:
94:
90:
247:
The concept of VDSL was first published in 1991 through a joint
2041:
2031:
2026:
1891:
1516:
1312:
885:
596:
183:
1347:
851:) cancellation in the downstream and upstream directions. The
2007:
2002:
1992:
1987:
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1672:
1563:
1213:"The ITU-T's New G.vector Standard Proliferates 100 Mb/s DSL"
553:
431:
70:
411:
A VDSL2 cabinet on top of a copper cabling cabinet in Italy.
1896:
1532:
1448:
1304:
InterOperability
Laboratory: DSL Testing Services Equipment
511:
493:
462:
260:
256:
862:, but future standard amendments could bring a solution.
580:
202:
1283:"Supervectoring: Telekom vermarktet VDSL mit 250 Mbit/s"
1156:"Very high speed digital subscriber line transceivers"
1083:"TR-348 Hybrid Access Broadband Network Architecture"
1022:. International Telecommunication Union. 27 May 2005
36:
Very high speed digital subscriber line transceivers
1619:
2153:Telecommunications-related introductions in 2001
2129:
1080:
1244:"What is VDSL Vectoring, SRA and G.INP ?"
1605:
1333:
1158:. International Telecommunication Union (ITU)
1137:. International Telecommunication Union (ITU)
1010:
1008:
1280:
954:
952:
950:
1299:InterOperability Laboratory: Knowledge Base
1612:
1598:
1340:
1326:
1005:
1103:
1101:
947:
242:
153:very high-speed digital subscriber line 2
1110:"Vplus gets more out of VDSL2 vectoring"
1074:
926:
865:
476:
452:
419:services such as voice, video, data and
406:
274:
1189:
145:Very high-speed digital subscriber line
14:
2130:
1638:List of ITU-T V-series recommendations
1098:
1056:"Tyrone Fabrication Ltd., Eircom VDSL"
201:using the frequency band from 25
1593:
1321:
1048:
428:International Telecommunication Union
223:International Telecommunication Union
426:The protocol is standardized in the
182:VDSL offers speeds of up to 52
24:
915:List of VDSL and VDSL2 deployments
822:
165:asymmetric digital subscriber line
27:Digital subscriber line technology
25:
2169:
2118:All articles beginning with "ITU"
1892:G.9700, G.9701, G.9710 and G.9711
1292:
270:
209:, as well as telephone services (
395:
1274:
1260:
1236:
1205:
1183:
1169:
1148:
1124:
298:quadrature amplitude modulation
2148:ITU-T G Series Recommendations
1657:Category:ITU-T recommendations
1652:Category:ITU-R recommendations
1081:Broadband Forum (2016-07-01).
1034:
991:
973:
302:discrete multi-tone modulation
13:
1:
920:
517:
7:
2158:Telecommunication protocols
1623:recommendations (standards)
1281:heise online (2018-08-16).
910:List of interface bit rates
898:
837:noise-cancelling headphones
530:
430:telecommunications sector (
228:Second-generation systems (
10:
2174:
1569:Ethernet in the first mile
421:high-definition television
207:high-definition television
2111:
2063:ITU-R 468 noise weighting
2055:
2016:
1915:
1665:
1628:
1556:
1525:
1441:
1434:
1389:
1363:
1356:
1132:"IT-T xDSLxDSL Standards"
118:
110:
100:
86:
76:
66:
56:
48:
40:
35:
1643:List of ITU letter codes
402:
225:(ITU) in November 2001.
219:analog telephone service
2138:Digital subscriber line
1349:Digital subscriber line
510:can be used to combine
161:digital subscriber line
1190:tsbmail (2013-06-14).
508:Hybrid Access Networks
490:
474:
412:
285:
243:Conceptual development
2143:ITU-T recommendations
866:VDSL2+ Supervectoring
860:local-loop unbundling
480:
461:Cabinet installed by
456:
410:
278:
1579:Single Pair Ethernet
1535:(early CAP variants)
891:and 100 Mbit/s
485:engineer works at a
81:ITU-T Study Group 15
1574:Long Reach Ethernet
1454:ANSI T1.413 Issue 2
1442:ANSI / ETSI / ITU-T
1364:ANSI / ETSI / ITU-T
577:downstream transmit
375:Amendment 1 (11/15)
259:and relatively new
189:and 16 Mbit/s
32:
1963:H.262/MPEG-2 Video
1351:(DSL) technologies
1062:on 31 January 2012
833:noise cancellation
491:
475:
413:
286:
30:
2125:
2124:
1978:H.265/MPEG-H HEVC
1587:
1586:
1552:
1551:
1517:G.fast and MGfast
1430:
1429:
1248:www.draytek.co.uk
999:"G.993.1 (06/04)"
853:far-end crosstalk
849:far-end crosstalk
820:
819:
575:Maximum aggregate
393:
392:
142:
141:
105:telecommunication
87:Related standards
16:(Redirected from
2165:
2120:
1998:H.323 Gatekeeper
1983:H.266/MPEG-I VVC
1973:H.264/MPEG-4 AVC
1916:H series (ITU-T)
1666:G series (ITU-T)
1614:
1607:
1600:
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1264:
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1234:
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1230:
1224:
1218:. Archived from
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1200:
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1181:
1180:
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1166:
1164:
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1152:
1146:
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1143:
1142:
1136:
1128:
1122:
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1120:on 25 July 2015.
1116:. Archived from
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1093:
1092:
1087:
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1072:
1071:
1069:
1067:
1058:. Archived from
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989:
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882:Deutsche Telekom
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193:, over a single
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114:Freely available
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2068:ITU-R BS.1534-1
2051:
2012:
1911:
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1376:HDSL2 and HDSL4
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823:VDSL2 vectoring
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319:Downstream rate
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215:Internet access
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28:
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2083:ITU-R BT.470-7
2080:
2078:ITU-R BT.470-6
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1114:Alcatel-Lucent
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987:. 21 May 2001.
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871:Supervectoring
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57:Latest version
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2103:ITU-R BT.2100
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2098:ITU-R BT.2020
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2073:ITU-R BT.1304
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378:VDSL2 Annex Q
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322:Upstream rate
321:
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313:Standard name
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211:voice over IP
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62:November 2015
59:
55:
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34:
19:
2113:
2093:ITU-R BT.709
2088:ITU-R BT.601
1647:
1646:
1633:
1632:
1504:
1285:(in German).
1276:
1262:
1251:. Retrieved
1247:
1238:
1227:. Retrieved
1220:the original
1207:
1196:. Retrieved
1185:
1171:
1160:. Retrieved
1150:
1139:. Retrieved
1126:
1118:the original
1089:. Retrieved
1076:
1064:. Retrieved
1060:the original
1050:
1036:
1026:22 September
1024:. Retrieved
1020:News release
1019:
993:
981:"VDSL Speed"
975:
963:. Retrieved
937:. Retrieved
928:
869:
857:
844:
840:
835:, much like
826:
538:
534:
521:
502:
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436:
425:
414:
394:
373:ITU G.993.2
325:Approved on
287:
265:
246:
229:
227:
199:copper wires
195:twisted pair
181:
175:(ADSL2) and
156:
152:
148:
144:
143:
67:Organization
49:Year started
1648:Categories:
1526:Proprietary
1390:Proprietary
874: [
498:local loops
417:triple play
389:2015-11-06
370:VDSL2-Vplus
365:2006-02-17
353:ITU G.993.2
345:2001-11-29
333:ITU G.993.1
316:Common name
239:increases.
237:attenuation
2132:Categories
1510:deployment
1486:G.lite.bis
1435:Asymmetric
1253:2021-01-25
1229:2016-07-24
1198:2013-07-04
1162:2024-01-08
1141:2024-01-08
1091:2018-07-01
921:References
889:downstream
607:throughput
592:throughput
588:downstream
439:downstream
386:100 Mbit/s
383:300 Mbit/s
362:100 Mbit/s
359:200 Mbit/s
300:(QAM) and
294:downstream
234:local loop
187:downstream
179:(ADSL2+).
2114:See also:
1422:DSL Rings
1412:Etherloop
1357:Symmetric
1194:. Itu.int
829:crosstalk
609:(Mbit/s)
570:bandwidth
559:Number of
549:Bandwidth
518:Vplus/35b
483:Openreach
471:Hong Kong
467:Pat Heung
380:VPlus/35b
339:55 Mbit/s
77:Committee
2018:V series
899:See also
893:upstream
845:G.vector
604:upstream
564:carriers
545:Profile
531:Profiles
457:A VDSL2
443:upstream
342:3 Mbit/s
290:upstream
253:Stanford
249:Bellcore
191:upstream
132:/T-REC-G
44:In force
2020:(ITU-T)
1928:H.225.0
1923:H.222.0
1867:G.993.2
1862:G.993.1
1855:Annex M
1850:G.992.5
1845:G.992.4
1838:Annex L
1833:Annex J
1828:G.992.3
1823:G.992.2
1818:G.992.1
1813:G.991.2
1808:G.991.1
1748:G.723.1
1738:G.729.1
1733:G.722.2
1728:G.722.1
1557:Related
1498:Annex M
1481:Annex L
1476:Annex J
1066:8 March
965:24 July
939:24 July
905:FS-VDSL
807:4.3125
801:35.328
778:30.000
761:4.3125
755:17.664
738:4.3125
715:4.3125
692:4.3125
669:4.3125
646:4.3125
623:4.3125
579:power (
568:Carrier
504:Bonding
489:cabinet
487:UK VDSL
310:Version
177:G.992.5
173:G.992.3
169:G.992.1
167:(ADSL)
119:Website
111:License
95:G.993.2
91:G.993.1
60:(11/15)
1907:G.9972
1902:G.9970
1897:G.9960
1887:G.8262
1882:G.7043
1877:G.7042
1872:G.7041
1634:Lists:
1493:ADSL2+
1464:G.lite
1313:Curlie
1001:. ITU.
886:Mbit/s
839:. The
810:+17.0
787:+14.5
784:8.625
764:+14.5
741:+14.5
718:+14.5
695:+14.5
686:8.832
672:+11.5
663:8.500
649:+20.5
640:8.832
626:+17.5
617:8.832
597:Mbit/s
572:(kHz)
448:ADSL2+
184:Mbit/s
159:) are
151:) and
101:Domain
41:Status
2056:ITU-R
2008:H.450
2003:H.324
1993:H.323
1988:H.320
1968:H.263
1958:H.261
1953:H.248
1948:H.245
1943:H.241
1938:H.239
1933:H.235
1803:G.988
1798:G.987
1793:G.984
1788:G.983
1783:G.811
1778:G.806
1773:G.798
1768:G.783
1763:G.729
1758:G.728
1753:G.726
1743:G.723
1723:G.722
1718:G.719
1713:G.718
1708:G.711
1703:G.709
1698:G.707
1693:G.706
1688:G.704
1683:G.703
1678:G.165
1673:G.114
1564:DSLAM
1539:RADSL
1471:ADSL2
1459:G.dmt
1407:MSDSL
1381:SHDSL
1223:(PDF)
1216:(PDF)
1135:(PDF)
1086:(PDF)
878:]
804:8192
781:3479
758:4096
735:2783
712:2783
689:2048
666:1972
643:2048
620:2048
602:Max.
586:Max.
561:total
459:DSLAM
432:ITU-T
403:VDSL2
356:VDSL2
350:VDSL2
230:VDSL2
157:VDSL2
71:ITU-T
18:VDSL2
2047:V.92
2042:V.24
2037:V.23
2032:V.11
2027:V.10
1544:UDSL
1533:ADSL
1449:ADSL
1417:HVDL
1402:SDSL
1397:IDSL
1371:HDSL
1068:2012
1028:2011
967:2016
941:2016
816:100
813:300
798:35b
793:100
790:230
775:30a
767:150
752:17a
729:12b
706:12a
512:xDSL
494:ADSL
463:PCCW
441:and
336:VDSL
330:VDSL
292:and
261:ADSL
257:HDSL
149:VDSL
134:.993
130:/rec
128:.int
126:.itu
52:2001
31:VDSL
1621:ITU
1311:at
1309:DSL
770:50
747:22
744:68
732:12
724:22
721:68
709:12
701:16
698:50
683:8d
678:16
675:50
660:8c
655:16
652:50
637:8b
632:16
629:50
614:8a
581:dBm
554:MHz
481:An
465:in
283:SoC
280:DSL
203:kHz
197:of
124:www
2134::
1246:.
1112:.
1100:^
1018:.
1007:^
983:.
949:^
895:.
876:de
599:)
583:)
556:)
469:,
450:.
171:,
136:.2
93:,
1613:e
1606:t
1599:v
1341:e
1334:t
1327:v
1256:.
1232:.
1201:.
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1144:.
1094:.
1070:.
1044:.
1030:.
969:.
943:.
595:(
552:(
473:.
251:-
155:(
147:(
20:)
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
