Historical
T1.417-2003
Spectrum Management for Loop Transmission Systems
This standard provides spectrum management requirments and recommendations for the administration of services and technologies that use metallic subscriber loop cables. Spectrum management is the administration of the loop plant in a way that provides spectral compatibility for services and technologies that use pairs in the same cable. In order to achieve spectral compatibility, the ingress energy that transfers into a loop pair, from services and transmission system technologies on other pairs in the same cable, must not cause an unacceptable degradation of performance. In addition, the egress energy from a particular loop pair must not transfer into other pairs in a manner that causes an unacceptable degradation in the performance of services and technologies on those pairs. This standard includes signal power limits, technology deployment guidelines, and transverse balance and longitudinal output voltage requirements for digital subscriber line spectrum management classes, and requirements for short-term stationary systems. It also provides generic analytical methods to determine spectral compatibility of repeatered and non-repeatered digital subscriber line technologies.
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