Patent ID: 7072449

Claim:
A method of establishing a transmission power level for signals transmitted in a conductor in an environment where signal interference is present between said signals in said conductor and separate signals carried in a proximate conductor, said method comprising the steps of: determining a reference signal interference level at an end of said proximate conductor from a reference signal capable of being propagated from an opposing end of said proximate conductor; and determining a transmission power level for said signals to provide a signal interference level based on said reference signal interference level; and wherein said transmission power level is determined utilizing a transmission power level function that is dependent on frequency of said signals, and said transmission power level function is expressed as: VDSL PSD ⁡ ( f ) = ADSL FEXT ⁡ ( f ) - 10 ⁢ ⁢ log ⁡ ( K FEXT × L c × ( 1 49 ) 0.6 × f 2 ) + Atten ⁡ ( L c , f ) where VDSL PSD (f) is said transmission power level for said signals, L c is a common loop length of said proximate conductor with said conductor carrying said signals. K FEXT is a coupling constant for said conductor, f is said frequency of said signals, Atten is a first attenuation function for signals propagated through said conductor dependent on L c and f and ADSL FEXT (f) is said reference signal interference level.