Line Impairment: Detection of Home's Bridge taps (ATU-R) and Crosstalk (ATU-C)From VOCAL Data & Telephony Software point of view, frequency and time domain probing are very important functions that should be provided within T1.413. The lack of these features could impact the deployment of the xDSL modems especially for developing countries. xDSL modems will be sensitive to line impairments and cross-talk with other lines carrying ISDN, T1/E1 or even other xDSL modems. The reason to ask for including this facility in the T1.413 Issue 2 standard is to assure interoperability between the different companies' design.
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