ADSL/SDSL Technology

2 days

DSL Introduction
In preparation for understanding DSL technology this introduction covers the local loop bandwidth availability, modem principles, modulation techniques and line codes. It also explains noise issues.

The xDSL Family
Outlines the differences between the DSL technologies and introduces ADSL, HDSL, RADSL, VADSL, VDSL, and SDSL.

How ADSL Works
An in-depth look at ADSL technology, including ADSL bandwidth usage, implementation, standardisation and the ADSL Infrastructure.

ADSL Framing and Encapsulation
Introducing the fast and interleaved frames and superframes. Explains how the frame structure is used, especially for Voice transmission. Also covers encapsulation modes, RFC 1483, L2 tunnelling and ATM mode.

Further Developments
A look at the enhanced standards - ADSL2, ADSL2+ and VDSL - to see the progress made to give customers the high-speed connectivity in today's market.

Subscriber Access
Looking at security, multicasting, PVC and SVC support. Also examining the infrastructure outlining the role of the DSLAM (Digital Subscriber Line Access Multiplexer), the use of HFC (Hybrid Fibre Coax) and its implementation.

A description of how SDSL operates technically and a look at the structure and modulation methods used. Also a comparison of the ITU standard and the ETSI standard.