of the papers below are in Adobe Acrobat format. To read them
you need the free Acrobat reader, available by
clicking the icon, below.
I have listed the papers I think will be most popular first.
Many of these papers have my old e-mail address - I haven't
gone through them and modified the e-mail address. My
new e-mail address is
to Optical Networks”
2000. Starts with the basic
physics of light, then uses these principals to explain how
lasers and photo detectors operate. Discusses optical
fiber and the various operating bands. Explains how
optical communications is used in the network. Gives a
basic introduction to SONET and digital wrapper. This
has been a very popular paper, with almost 750 downloads
(from the Mindspeed web site) during one peak month. Averages several hundred
downloads per month. A companion presentation is
2001. Gives a detailed explanation
of SONET and SDH, down to the octet level. Also
discusses SONET rings and recovery from fiber and node
failures. A companion presentation is available here.
All of the presentations noted on this page are available in PowerPoint,
with speaker notes. Send me an e-mail to request them in
This paper was used as Chapter 6 in the book
Telecommunications Technology Handbook by
Daniel Minoli, published in 2003.
and E1/E3 Framing and Multiplexing” 2002. Describes how
digital communications signals are multiplexed.
Specifically this paper looks at the North American DS1
through DS3 and the European E1 through E3 frame and
multiplexing structures. Originally, these were not plesiochronous
signals so multiplexing required a technique to handle the
different clock rates of the signals being multiplexed.
The line codes used for each rate are described in an appendix.
"Fundamentals of Telecommunications - Voice"
"Fundamentals of Telecommunications - Data"
2014. I worked on these presentation in 2014 and never
really finished them. But there's some good information
in them and that's why I'm putting them here on the web site.
They're fairly large files.
Web Server" 2003.
Describes a way of enhancing a residential gateway to include
a web server function. This product would allow
residential broadband customers to host their personal web
sites without the disk space limitations of most broadband
Equations for High School Students” 2002. Provides
the mathematical background for a high school student to
understand the basics of differential equations. Starts
with a discussion of the natural number e, then gives a
detailed explanation of complex numbers, the complex number
plane, and algebraic manipulation of complex numbers, leading
to Euler’s equation. A short review of differential
calculus is given leading to the actual discussion of
differential equations. A additional paper,
Logarithms", is a supplement to this paper.
Error Correction in Optical Networks” 2000. Explains the
forward error correction techniques now standardized in ITU
recommendations G.707 and G.709. The paper was written
about the time G.709 was first approved and does not include
the changes to G.709 since February 2001. A companion
presentation is available here.
the Last Mile Bottleneck”
1999. A queuing analysis
of voice over HDSL, assuming that silence suppression is used
on the voice channels. A closed form M/M/1 analysis is
provided, along with a non-closed form simulation. A
companion presentation is available here.
2000. Extends the analysis done in
“Eliminating the Last Mile Bottleneck” to ADSL circuits.
Data Transmission across the PSTN” 1997. This
paper was written during the “56K War” before the V.90
standard was developed. It explains how modems work and
how 56K technology differs from traditional modems. This
paper received very wide circulation and was posted on many
ISP sites during the early days of 56Kbps modems.