Check the papers available on Voice over DSL,
Optical Networks, SONET/SDH, digital wrapper, and my latest paper which
describes the framing and multiplexing of DS1, DS2, DS3, E1, E2, and E3 signals, titled "DS1/DS3
and E1/E3 Framing and Multiplexing."
P. Michael Henderson
obtain resume in Acrobat (pdf) format, click here.
communications industry experience in engineering and
marketing management as well as product planning.
Louisiana State University
MBA, Nova Southeastern University
in almost all aspects of a communications business, including
marketing, engineering, finance, and VLSI fabrication. Experienced public speaker, have appeared on many
industry panels and made presentations at major trade shows.
– able to visualize new product opportunities and gain
acceptance for them in the corporation. Initiated the 56Kbps and the splitterless DSL modems at
on thirty-two issued patents, including a fundamental patent
on splitterless DSL operation used in G.992.2.
in a wide variety of communications technologies,
including SONET/SDH, G.709 digital wrapper, IEEE 802.17
resilient packet rings, Ethernet, analog modem modulations,
DSL, ISDN, ATM, cable modems, TCP/IP, speech processing, and
Communicator – have the ability to explain complex
technical ideas in layman’s terms. For examples, see my public papers at
interpersonal skills – work well with people from all
areas of the business.
– Maintain a high level of activity in both
business and personal life.
2003 to present
specializing in Communications Marketing.
assignments over the past year have involved preparation of
marketing plans for a startup company, presentation material for
a performance analysis company, and preparation of technical
marketing collateral for a DSL communications company.
consulted for two private investment companies to better
understand the market potential for VOIP and a multi-line DS3
2001 to 2003
TDK Semiconductor, Tustin, CA
2003 – Strategic Marketing.
Reporting to the Vice President
of Marketing, my responsibilities are to develop the product
roadmap for the TDK broadband product line and to develop strategic
product areas are DS3 LIUs and OC-1 through OC-48 SONET/SDH
transceivers. I have focused primarily on the DS3/E3 LIU area –
increasing the number of ports and adding new features such as
digital jitter attenuators and a desynchronization function.
negotiated a strategic relationship with PMC-Sierra for our
DS3/E3 LIUs, including contract negotiations and the joint
announcement. I am presently working strategic relationships
with other companies and to expand our relationship with PMC-Sierra.
conceived a new Ethernet based product called the "Personal Web
Server," built the business case, and wrote the product
requirements document. I identified potential partners and
worked to develop strategic relationships.
previously investigated the market opportunity for DS3/E3 framer
and mapper products, voice over IP products, 10Gigabit Ethernet
over copper, Ethernet over cable system cabling, and enhanced
telephony for the home products.
I also taught classes within
TDK Semiconductor on communications and authored a paper on
DS1/E1 and DS3/E3 line codes and framing.
|1996 to 2001
Newport Beach, CA
Business Planning, CTO
Responsible for product
definition in the area of SONET/SDH, optical communications,
and the emerging optical transport network (OTN). Very
knowledgeable in SONET/SDH – have taught classes in this area
within Mindspeed. Attend ANSI T1X1.5 and ITU-T meetings for
SONET/SDH and optical communications related work.
Led a multidiscipline team
investigating “The Future of the Network” to
anticipate how the data network will develop over the next
five years. Two
major areas of investigation were 1/10Gigabit Ethernet and
metropolitan area networks, including resilient packet rings.
opportunities, and did product definition, in the Voice over
DSL (VoDSL) and voice over IP (VoIP) markets, especially the
opportunity to increase the number of telephone circuits which
could be carried over a DSL line by exploiting silence
suppression. Developed queuing models to do simulations of
to 1998 – Marketing, Network Access Products.
Managed a six person marketing
team responsible for Rockwell’s $130 million central site
product business, providing modems and other communications
products to access concentrator manufacturers who supplied
over 70% of the ports shipped each year.
I initiated Conexant’s 56Kbps modem
project, which is now V.90, and managed the marketing efforts
for the central site chip set products.
I defined and managed the market strategy and business
relationships which allowed us to achieve over 50% ISP port
market share against US Robotic’s X2 technology.
developed the concepts for and initiated Conexant’s
innovative splitterless DSL technology. This work
resulted in a fundamental technology patent on splitterless
DSL operation, on which I am named as lead inventor (patent
number 6,101,216). Concurrent with my central site
marketing responsibilities, I guided the development of this
technology within Conexant while defining the launch strategy.
When it became clear that the industry was
focusing on DMT DSL technology, I helped identify potential
technology partners and assisted in the creation of an
alliance with Pairgain to obtain rights to their Falcon DMT
|1978 to 1996
||AT&T Paradyne, Largo, FL
1992 to 1996 –
of a development organization of 24 engineers, including
hardware, software and DSP engineers, in the development of an
innovative voice and data communications system.
Worked closely with Microsoft and Novell to
integrate this product into Windows NT and Novell NetWare
NetConnect, and with a T1/ISDN PRI board manufacturer to
develop drivers for these operating systems.
Responsible for a development budget of $3 million.
1987 to 1992 – Software Development.
a group of software engineers in the development of leased and
dial modem products. Championed the company’s entry
into the dial modem business and managed the development of
the first product offering, the DataPort dial modem product.
championed the development of a
simultaneous voice and data modem, based on an innovative
modem concept, called VoiceSpan, developed by two AT&T
Paradyne Engineers. Announced
at Comdex in November 1993, the DataPort 2001 Multimedia
Communicator won “Best of Comdex” and was featured in
Popular Science’s “100 Best Products of 1994.”
1985 to 1987 – Product Planning.
for three product areas: Response (a minicomputer product), PIX/PIXNET (a
specialized packet switch product), and CRT terminals. Developed an overall product strategy and was the
architect of two new products, PIXNET XL, a high performance
packet switch for IBM mainframes, and PDX, a multifunction
workstation capable of emulating multiple different terminals.
1978 to 1985 – Engineer. Helped
design a real time transaction processing operating systems,
initially assigned to the file management system. Was
promoted to supervisor after one year, heading up development
of the file management system.
Patents and Papers
Patents – Thirty-two US patents
switching for DSL signal transmission” (continuation of 6,151,335)
7,110,720 “Local area internet
6,975,585 "Slotted synchronous
frequency division multiplexing for multi-drop networks"
6,754,233 “Method and apparatus for transmitting data between a
central site and multiple data subscribers”
6,731,653 “Method and apparatus for handling multiple data
subscribers at a central site”
“System and method for distributing enhanced telephony service
to customer premises equipment”
6,711,138 “Digital subscriber line/home phoneline network
6,694,125 “System and method for extending the range of a base
6,686,755 “Methods for wireless testing of integrated circuits”
6,683,888 “Method and apparatus for establishing modem
connections over a packet network”
6,678,375 “Efficient use
of wire for data communication system”
6,647,109 “Network telephony”
6,546,098 "System and method
for distributing enhanced telephony service to customer
6,531,982 “Field unit for use
in a GPS system”
6,493,355 “Method and
apparatus for the flexible use of speech coding in a data
“Method and apparatus for sensing an audio signal that is
sensitive to the audio signal and insensitive to background
noise” (continuation of 6,072,882)
6,400,968 "System and method for extending the range of a base
6,353,666 “System and method for providing an enhanced audio
quality telecommunication session”
6,353,413 “Multi-function universal controller and locator
“Method and apparatus for wireless testing of integrated
“Cable modem optimized for high-speed data transmission from
the home to the cable head” (continuation of 5,986,691)
“Constant envelope modulation for splitterless DSL
“System and method for a monolithic directional microphone
“Use of converging beams for transmitting electromagnetic
energy to power devices for die testing”
“Modulation switching for DSL signal transmission”
“Splitterless digital subscriber line communication
6,072,882 “Method and apparatus for sensing an audio signal
that is sensitive to the audio signal and insensitive to
“Battery charger and power source employing an environmental
energy extractor and a method related thereto”
“Cable modem optimized for high-speed data transmission from
the home to the cable head”
5,983,271 “Method for processing asynchronous low level
protocols in a communications
device to offload the main processor”
“Controlled simultaneous analog and digital
“Dial restoral method and apparatus”
|Papers – Publicly Available at
Personal 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
"DS1/DS3 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. These are not plesiochronous
signals so multiplexing requires a technique to handle the
different clock rates of the signals being multiplexed.
The line codes are described in an appendix.
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. Written for a young friend who
plans to study EE at Georgia Tech starting in 2002.
of SONET/SDH” 2001. Gives a detailed explanation
of SONET and SDH, down to the octet level. Also
discusses SONET rings and recovery from fiber and node
This paper was used as Chapter 6 in the book
Telecommunications Technology Handbook by
Daniel Minoli, published in 2003.
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.
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
during one peak month. Averaged several hundred
downloads per month on the Mindspeed web site.
over ADSL” 2000. Extends the analysis done in
“Eliminating the Last Mile Bottleneck” to ADSL circuits.
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.
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.