Adsl spec

ADSL_Tutorial[1]ADSL TUTORIAL
Matthew J. Langlois, University of New Hampshire InterOperability Laboratory 121 Technology Drive, Suite 2, Durham, NH 03824 USA. Extracted from the Introduction and Chapter 1 of A G.hs Handshaking Protocol Analyzer For ADSL, a Master’s Project by Matthew J. Langlois, May 2002. INTRODUCTION The demand for high-speed data networks in the “last mile” has driven the need for robust, interoperable, and easy to use multi-vendor Digital Subscriber Line (DSL) access solutions. DSL collectively refers to a group of technologies that utilize the unused bandwidth in the existing copper access network to deliver high-speed data services from the distribution center, or central office, to the end user. DSL technology is attractive because it requires little to no upgrading of the existin