User`s guide

A. Configuration Options
A-16
May 2002 7990-A2-GB20-00
Spectrum Management
Possible Settings: Enable, Disable
Default Setting: Disable
For an STU-C, enabling spectrum management limits the DSL speeds on the unit to meet
BT Access Network Spectrum standards. The purpose of Spectrum Management is to
facilitate a reasonable spectral environment for the coexistence of multiple technologies in
a loop plant with an acceptable level of crosstalk between them. In some countries, the
DSL service provider must meet the spectrum management specification of that country.
For example, in the United Kingdom, it is a requirement that the product comply with the
OFTel PSD mask for the loop length requested (short, medium or long). Support for this
requirement is provided by enabling Spectrum Management and properly setting the
Estimated Line Length option (see Table A-1, DSL Interface Options).
Spectrum Management only appears when DSL Mode is set to STU-C.
Enable – Spectrum Management is enabled.
Disable – Spectrum Management is disabled.
Country Code
Possible Setting: UK (read-only)
For an STU-C, determines the spectrum management standard to be used (ANFP for UK)
to calculate the speeds allowed on this unit which comply with spectrum management.
Country Code only appears when DSL Mode is set to STU-C and Spectrum
Management is set to Enable.
Table A-6. System Options (3 of 3)