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AR Router Troubleshooting Guide

This Product Documentation provides guidance for maintaining AR Enterprise Router, covering common information collection and fault diagnostic commands, typical fault troubleshooting guide, and troubleshooting.
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What Standards Do ADSL/VDSL/G.SHDSL Interfaces of AR Routers Comply With?

What Standards Do ADSL/VDSL/G.SHDSL Interfaces of AR Routers Comply With?

Table 29-16 lists the standards to which ADSL/VDSL/G.SHDSL interfaces of AR routers comply.

Table 29-16  Standard compliance of ADSL/VDSL/G.SHDSL interfaces
xDSL Interface Usage Scenario Standard Compliance

ADSL

Annex A is applied to ADSL over POTS and compatible with POTS services.

  • ITU-T 992.1 G.DMT
  • ANSI T1.413 Issue 2
  • ITU-T 992.3
  • ITU-T 992.5

Annex B is applied to ADSL over ISDN and compatible with ISDN services.

  • ITU-T 992.1 G.DMT
  • ITU-T 992.3
  • ITU-T 992.5

Annex M expands the upstream frequency band of ADSL and provides a higher upstream transmission rate.

Both G.992.3 and G.992.5 define Annex M. They define the same upstream frequency band but different downstream frequency bands:
  • The maximum downstream frequency band of Annex M defined in G.992.3 is 1104 kHz.
  • The maximum downstream frequency band of Annex M defined in G.992.5 is 2208 kHz.
  • ITU-T 992.3
  • ITU-T 992.5

G.SHDSL

  • North America: G.991.2 Annex A/F
  • Europe: G.991.2 Annex B/G
  • ITU-T 991.1
  • ITU-T 991.2

VDSL

  • Supports VDSL2, VDSL over POTS, and is compatible with POTS services.
  • Supports profile 17a.
  • Be able to roll back to ADSL/ADS2/ADSL2+ (G.992.5).
  • ITU-T 993.2
  • ITU-T 992.5 (can roll back to the ADSL mode)
  • ITU-T 992.3 (can roll back to the ADSL mode)
  • ITU-T 992.1 G.DMT (can roll back to the ADSL mode)
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Updated: 2019-05-10

Document ID: EDOC1000079719

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