Knowledge Base

Title Authors Category Updated
A G.hs Handshaking Protocol Analyzer For ADSL Matthew Langlois

A protocol analyzer is a device that non-intrusively monitors bi-directional communications on a link, demodulates the physical layer signals, and captures the raw binary data for subsequent state and timing analysis. There are no commercial products currently available that perform this function for ADSL link initialization procedures. In this project, a MATLAB application was developed that enables capture (via a digital sampling oscilloscope) and protocol analysis of the first segment, known as handshaking, of the ADSL link initialization procedure. The protocols of interest are ITU-T G.994.1 (G.hs), which defines the activation and handshaking procedures used by complaint ADSL equipment, and ITU-T G.992.1 (G.dmt), which defines the physical layer requirements of ADSL equipment utilizing the Discrete Multi-Tone (DMT) line code.

Theses December 14, 2001
ADSL Systems - An Overview Praveen Reguraman (UNH-IOL)

An overview of ADSL systems that includes network architecture, protocol architecture, typical ADSL implementations, RFC1483 bridging, PPP over ATM over ADSL, and PPP over Ethernet over ADSL.

Tutorials June 26, 2012
ADSL Tutorial Matthew Langlois (UNH-IOL)

This tutorial provides an overview of ADSL technology and focuses on the physical layer as defined in ANSI T1.413-1998. From the 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 existing copper infrastructure that connects nearly all populated locations in the world. In addition, DSL is inherently secure due to its point-to-point nature."

Tutorials June 26, 2012
DSL Crosstalk Simulation and Calibration Tim Clark (UNH-IOL)

The performance of DSL transceivers can be impaired by interference from other transceivers operating over wires in the same binder group. It is therefore important to test DSL transceivers in the presence of crosstalk, which can be simulated in a programming environment such as MATLAB. The simulated crosstalk can then be exported to an arbitrary waveform generator (AWG) for injection onto the line through a high-impedance noise injection circuit. This document describes a method of crosstalk simulation and calibration whereby white gaussian noise (WGN) is passed through a frequency-domain filter that gives the noise the spectral characteristics of crosstalk. The crosstalk is calibrated by measuring its power with a vector signal analyzer (VSA) and adjusting the output level on the AWG to achieve the desired noise power. By using MATLAB to estimate the simulated crosstalk power in the same manner as the VSA, the calibration can be performed in MATLAB without taking actual measurements.

White Papers May 11, 2004
DSL Physical Layer Testing Lincoln Lavoie (UNH-IOL)

An overview to DSL Physical Layer Testing.

Tutorials February 24, 2012
GPON: Why Conformance and Interoperability Testing are Key Lincoln Lavoie

An overview of Gigabit Passive Optical Networks (GPON) conformance and interoperability capabilities. A brief introduction to the power of PONs.

Tutorials June 27, 2012
Newton Harry Newton with Ray Horak contributing editor

From the back cover: "I wrote this book for those of us in the world's most exciting industries - telecommunications, networking and the Internet. I deliberately didn't write a book that only geeks could understand. I wrote a business book that you and I could understand. I explain the technical concepts in non-technical , business language that anyone in business (whether buying, selling or investing) should be able to understand. Some of my definitions are short. Some are encyclopedic. My focus is 720 practical. What the term means. What the technology does. What benefits the technology confers. which pitfalls to watch for. Use this book in your day-to-day business life. Dip into it before a meeting with a vendor, a customer, a broker or a boss. I've got 19 years in this book. My readers and my contributing editor, Ray Horak, have contributed enormously over the years. By now, all of us have made this dictionary pretty darn good. I'm proud of this edition."

Recommended Textbooks June 26, 2012
VDSL Modulation Schemes: MCM vs. SCM Tim Clark (UNH-IOL)

This presentation provides an overview and comparison of the two proposed VDSL modulation schemes.

Tutorials October 2, 2002
Why And How To Test IPv6 Interoperability Timothy Winters

Check out this podcast as we discuss why testing v6 is crucial, and look at interoperability initiatives including the USGv6 program, a NIST effort to spur v6 adoption. Topics discussed include:

  • Why IPv6 interoperability testing is important
  • What gets tested and why?
  • How IPv6-only deployments are impacting interoperability testing
  • How has IPv6 testing impacted overall deployment of IPv6
  • Why USGv6 has been critical to IPv6 adoption
  • Why IPv6-only is likely to happen sooner than expected
  • What should IPv6/IPv4 feature parity look like
External Links August 13, 2018
10 Gigabit Ethernet Alliance 10 Gigabit Ethernet Alliance

Link to the 10 Gigabit Ethernet Alliance main page.

External Links June 29, 2012
10 Gigabit Ethernet Clause 48 Tutorial Vinod Venkatavaradan

Clause 48 overview

Tutorials December 12, 2001
10 Gigabit Ethernet Clause 49 Tutorial Sowmya Luckoor

N/A

Tutorials October 22, 2001
10 Gigabit Ethernet Clause 50 Tutorial Andy Baldman

N/A

Tutorials December 13, 2012
10 Gigabit Ethernet Clause 53 Tutorial Eric Lynskey

See Title.

Tutorials October 22, 2001
10 Gigabit Ethernet Deficit Idle Count Tutorial Eric Lynskey

Overview of deficit idle count

Tutorials October 22, 2001
10 Gigabit Ethernet MAC Tutorial Rupert Dance

N/A

Tutorials October 21, 2001
1000-T Jitter Test Channel Jon Beckwith

Subclause 40.6.1.1.1 of the IEEE 802.3 Standard defines a test channel to be used in the testing of the jitter on the reference clock of 1000BASE-T devices. The channel consists of two short segments of 120m UTP Category 5 compliant cable, along with one (or two, if necessary) long (the exact length is dependent upon the attenuation of the entire channel) segment of 100m UTP Category 5 compliant cable. The channel is to meet or exceed the insertion loss, crosstalk, and return loss requirements as specified in clause 40.7. The objective of this paper is to outline and describe, in detail, the specifications defined in subclause 40.6.1.1.1 of the IEEE 802.3-2002 standard for the Jitter Test Channel, and observe the results of the testing of a completed test channel. Included are plots, outlining the characteristics of the constructed test channel, along with the limits of each specific test.

Tutorials September 24, 2014
1000BASE-T Physical Coding Sublayer (PCS) Overview Bob Noseworthy

GE 1000BASE-T, Physical Coding Sublayer (PCS) functional basics and overview.

Tutorials February 29, 2000
1000BASE-T Technology Overview Adam Healey

N/A

Tutorials November 19, 1998
1000BASE-X Physical Coding Sublayer (PCS) and Physical Medium Attachment (PMA) Jon Frain

A brief tutorial describing the 1000BASE-X PCS and PMA sublayers that are defined in Clause 36 of the IEEE 802.3 Standard.

Tutorials April 13, 2012
100BASE-TX: Physical Medium Dependent

An overview of the 100BASE-TX PMD created by the UNH-IOL.

Tutorials June 28, 2012
10BASE-T Medium Attachment Unit

An overview of the 10BASE-T Medium Attachment Unit.

Tutorials July 5, 2012
10Gig Link Fault Signaling Eric Lynskey

Short overview of how 10Gig link fault signaling works.

Tutorials September 5, 2013
40 Gigabit Ethernet and 100 Gigabit Ethernet Technology Overview John D’Ambrosia, Force10 Networks, David Law, 3COM, and Mark Nowell, Cisco Systems

Overview of 40 and 100 Gigabit Ethernet Technology; provided by the Ethernet Alliance, June 2010

External Links July 5, 2012
802.1ad Provider Bridges UNH-IOL Bridge Functions Consortium

This presentation provides a high level overview and introduction to Provider Bridges.

Tutorials June 27, 2012