Knowledge Base

Title Authors Last Update Category
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.

May 11, 2004 White Papers
Design and Implementation of iFCP Claire Kraft

iFCP is one form of storage over TCP/IP that allows hosts and Fibre Channel storage devices to communicate directly. It is an encapsulation protocol that dictates the means by which Fibre Channel frames become the payload in an iFCP message. In addition, iFCP introduces a few new types of messages for purposes of control. This thesis is comprised of the design and implementation of iFCP end devices. The initiator has been implemented as a software module that behaves like a Fibre Channel Host Bus Adapter with an attached encapsulator. The target has been implemented as a stand-alone software program that acts both as an encapsulator and as a Fibre Channel switch that is attached through a generator to a Fibre Channel disk.

May 1, 2004 Theses
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.

September 24, 2014 Tutorials
EFM OAM Tutorial Kevin Daines

Tutorial generated by the IEEE EFM task force.

March 1, 2004 Tutorials
MPLS World Congress 2004 MFA and EANTC

This interoperability evaluation focused on the transport of differentiated services on a multi-vendor MPLS backbone supporting MPLS traffic engineering. The MPLS World Congress 2004 demonstrated differentiated services over MPLS and MPLS traffic engineering. Multi-vendor MPLS/BGP VPN\'s and Layer 2 Ethernet VPN\'s (Martini and VPLS) were configured to prove that services were traffic engineering-enabled and could process differentiated services.

February 23, 2004 White Papers
OSRM January 2004 Chris Volpe, Ichiro Inoue, Kaori Shimizu, Yumiko Kawashima, and Tom Dimicelli

The first OSRM event, held at the University of New Hampshire InterOperability Laboratory (UNH-IOL), provided an aggressive carrier-class environment for GMPLS testing including several GMPLS interworking scenarios that had not been achieved in previous multi-vendor test settings. The testing, conducted by the UNH-IOL OSRM test group, involved a variety of test cases that focused on stability testing, control channel fault handling and data channel failure recovery.

January 26, 2004 White Papers
Clause 24: 100BASE-X Physical Coding Sublayer (PCS)

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

January 1, 2004 Tutorials
Clause 37: Auto-Negotiation David Estes

An introduction to the Clause 37 Auto-Negotiation Process.

January 1, 2004 Tutorials
Clause 28 & 40 Auto-Negotiation: An Introduction to the Auto-Negotiation process Jeff Lapak

A brief introduction to auto-negotiation created by the UNH-IOL.

January 1, 2004 Tutorials
Clause 40: 1000BASE-T Physical Medium Attachment (PMA) Sublayer

1000BASE-T PMA overview (location in the OSI stack, interface with PCS, interface with Auto-Negotiation, PAM-5 Encoding Scheme, PMA Sublayers Functionality and Functions, and PMA Electrical Specifications).

January 1, 2004 Tutorials