1. J. Cioffi, T. Starr, P. Silverman, Digital Subscriber Lines, Prentice-Hall, Upper Saddle River, NJ, 1998.
2. American National Standard – T1.601-1992, Integrated Services Digital Network (ISDN) – Basic Access Interface for Use on Metallic Loops for Application on the Network Side of the NT (Layer 1 Sepcification), New York, 1992.
3. American National Standards Institute Technical Report TR28 (see also Bellcore Technical Advisories T1-NWT-001210 and 001211), New York, 1994.
4. American National Standard – T1.413-1995, ADSL Metallic Interface Specification, New York, 1995, Please see Issue-2, if available, T1.413-1999.
5. VDSL System Requirements Report, ANSI Document T1E1.4/98-043R2, June 1998, Huntsville, AL, Rev 14a. See also ETSI technical specification TS101-270-1 (1998-04), European Telecommunication Standards Institute, Sophia Antipolis, France.