G.993.1-2004 发布历史

G.993.1 VDSL (Very high speed Digital Subscriber Line) permits the transmission of asymmetric and symmetric aggregate data rates up to tens of Mbit/s on twisted pairs. G.993.1 is an access technology that exploits the existing infrastructure of copper wires that were originally deployed for POTS services. While POTS uses approximately the lower 4 kHz and ADSL/HDSL use approximately 1 MHz of the copper wire spectrum@ G.993.1 uses up to 12 MHz of the spectrum. G.993.1 can be deployed from central offices or from Fibre-fed cabinets located near the customer premises. G.993.1 includes worldwide frequency plans that allow asymmetric and symmetric services in the same group of wire pairs (known as a binder). This is accomplished by designating frequency bands for the transmission of upstream and downstream signals. G.993.1 transceivers must overcome many types of ingress interference from radio and other transmission techniques that occur in the same frequencies of typical deployment scenarios. Similarly@ G.993.1 transmission power levels have been designed to minimize potential egress interference into other transmission systems. As with other Recommendations in the G.99x series@ G.993.1 uses G.994.1 to handshake and initiate the transceiver training sequence. It has been agreed in the ITU-T to develop a subsequent VDSL2 Recommendation that specifies only DMT modulation@ and that is based on this Recommendation (VDSL) and on ITU-T Rec. G.992.3 (ADSL2).

G.993.1-2004由ITU-T - International Telecommunication Union/ITU Telcommunication Sector 发布于 2004-06-01，并于 2009-12-29 实施。

G.993.1-2004 发布之时，引用了标准

228 *， 2017-01-01 更新

* 在 G.993.1-2004 发布之后有更新，请注意新发布标准的变化。

G.993.1-2004的历代版本如下：

2001年11月01日 G.993.1-2001
2004年06月01日 G.993.1-2004

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标准号: G.993.1-2004
发布日期: 2004年06月01日
实施日期: 2009年12月29日
废止日期: 无
中国标准分类号: /
国际标准分类号: /
发布单位: ITU-T - International Telecommunication Union/ITU Telcommunication Sector
引用标准: 228

适用范围: G.993.1 VDSL (Very high speed Digital Subscriber Line) permits the transmission of asymmetric and symmetric aggregate data rates up to tens of Mbit/s on twisted pairs. G.993.1 is an access technology that exploits the existing infrastructure of copper wires that were originally deployed for POTS services. While POTS uses approximately the lower 4 kHz and ADSL/HDSL use approximately 1 MHz of the copper wire spectrum@ G.993.1 uses up to 12 MHz of the spectrum. G.993.1 can be deployed from central offices or from Fibre-fed cabinets located near the customer premises. G.993.1 includes worldwide frequency plans that allow asymmetric and symmetric services in the same group of wire pairs (known as a binder). This is accomplished by designating frequency bands for the transmission of upstream and downstream signals. G.993.1 transceivers must overcome many types of ingress interference from radio and other transmission techniques that occur in the same frequencies of typical deployment scenarios. Similarly@ G.993.1 transmission power levels have been designed to minimize potential egress interference into other transmission systems. As with other Recommendations in the G.99x series@ G.993.1 uses G.994.1 to handshake and initiate the transceiver training sequence. It has been agreed in the ITU-T to develop a subsequent VDSL2 Recommendation that specifies only DMT modulation@ and that is based on this Recommendation (VDSL) and on ITU-T Rec. G.992.3 (ADSL2).

G.993.1-2004

Very high speed digital subscriber line transceivers (Study Group 15)