Patent ID: 9246546
Filing Date: 2016-01-26
CPC Classification: H04B,H04J,H04M

Claim Text:
1. A method of calculating a set of values specifying a virtual noise mask, the method comprising: receiving a plurality of measurements of noise levels experienced at a digital subscriber line transceiver at each of a plurality of frequencies at different times, and for each frequency calculating a combined value based on a plurality of measurements taken at different times; and generating the set of values specifying a virtual noise mask in dependence upon the combined values, wherein the virtual noise mask specified by the calculated values is applied to a digital subscriber line connection associated with the transceiver at which the measured noise levels were experienced for use in a subsequent resynchronization of the transceivers of the connection, wherein such a mask is only applied in the event that more than a predetermined number of resynchronizations greater than two have occurred on that line within a predetermined period of time.