Patent ID: 7295603

Claim:
A digital subscriber line (DSL) communications system comprising: a bundled system having an exchange system electromagnetically coupled to a cabinet system, and a power spectral density (PSD) mask pattern for spectral shaping a VDSL mask applied to the cabinet system such that impact experienced by the exchange system from the cabinet system replicates self-impact experienced by the exchange system, wherein capacity of the exchange system is increased when the exchange system is deployed in a same bundle as the cabinet system, the PSD mask shaping pattern represented by an equation: C[f, 0]∞ E[f,y]=E[f, 0]/ H E [f,y]/ 2 ; where: C[f, 0 ] denotes the transmitted PSD from the cabinet system; E[f, 0 ] denotes a transmitted PSD from the exchange system; E[f,y] denotes an attenuated exchange PSD by an exchange loop of length y; H E [f,y] denotes the frequency response of the exchange loop; and y represents the distance from the cabinet system to the exchange system where f B E and B E is a common bandwidth.