Embedded Communicating Systems
provider of embedded software, hardware and system design since 1979
If you have need of support for an embedded software system, contact Embedded Communicating Systems to see if we can put together a team to satisfy your needs. Check out My Resume and my References and Projects Page to get an idea of my past projects both as a consultant and as a direct hire.I would like to recommend a great book about embedded system development and debugging, written by a friend and
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SNMP Simple Network Management Protocol CDMA Code Division Multiple Access DWDM Dense Wavelength Division Multiplexing L2 Switch Level 2 Switch CVS Concurrent Versions System client/server Source Control System Bugzilla Modem E Telemetry TABS Telemetry Asynchronous Block Serial TBOS Telemetry Block Oriented Serial Embedded Communicating Systems VxWorks GNU CGI Common Gateway Interface Graphviz SAC E2A Status and Command Remote DAS E2A Digital Alarm Scanner APR E2A Alarm Processing Remote GTP E2A General Telemetry Processor ATP E2A Advanced Telemetry Processor LADS Local Alarm Display System TCAS T Carrier Administration System SCOTS Surveillance and Control of Transmissions Systems TMAS Transmission Maintenance and Administration System TASC Transmission Alarm Surveillance and Control System ACORN E2 E2a E3 CDO Satellite Community Dial Office Satellite Remote Jedai Broadband Networks SQL Structured Query Language Structured Design Methodology 100BaseT GBE Gigabit Ethernet RAID Redundant Array of Independent Drives Redundant Array of Inexpensive Drives IIC I2C bash korn shell Telecom Analysis Systems TAS Telephone Channel Simulator Gemini Dual Terminal Emulator TASKIT TAT-9 Transatlantic Cable FT3C FT Series G DACS cellular telephone series 2 CDMA cellular base station PSOS RTXC unix linux ms-dos msdos desqview 386 assembly language MKS Toolkit Loran VOR VHF Omnidirectional Ranging 3B1 3B2 Tropaion qualcom MDM Mobile Diagnostic Monitor GPS Global Positioning System Rake Receiver multipath rayleigh fading Killington Ski Area snowmaking leslie and preston smith Vermont Technical College Goodro Lumber Company ARINC 653 SCOE ARINC 429 Woodstock Union High School ghost story ETEST E-Telemetry Test Set TBOS Test Set V.90 V.34 202T FDDI Fiber Distributed Digital Interface FAA Federal Aviation Administration cessna 152 piper tomahawk traumahawk DDS Dataphone Digital Service DSU CSU RAU Repeater Access Unit DLM T1 Directed Line Monitor DPM T1 Digital Performance Monitor TNC Telemetry Network Controller ANC Acorn Network Controller ETRT E-Telemetry Receiver Transmitter NI E-Telemetry Network Interface Forth pamela sex penelope cruz power pc 8260 packetstorm build manager voice response system NJIT New Jersey Institute of Technology microprocessor 8080 8085 8086 80188 z80 VOIP voice over Internet Protocol faxmodem facimile modem RS232 RS422 RS423 RS484 IEEE 488 GPIB General Purpose Interface Bus starlan DR6 digital radio microwave Lucent Western Electric Network Management System Element Management System TL1 ASN.1 G2 Turn Of River Lodge senior technical associate member of technical staff senior software engineer senior consultant soft modem softmodem catalog customizable design
William J. Biessman
10741 NW 45th st, apt 7
Coral Springs, FL, 33065
SUMMARY: Over 30 years and hardware,software and systems development experience, involving:
Real-time communication software and system design, including CDMA wireless systems
Embedded OS experience with VxWorks and pSOS in C and various Assembly languages, among others.
Development under UNIX and various PC environments
Microprocessor based system design (Intel 80x86 and Motorola 680x0, ARM, PowerPC)
Structured design and device driver implementation
Circuit design and interface development
EDUCATION: Bachelor of Science Degree in Electrical Engineering (Cum Laude),
New Jersey Institute of Technology, Newark, New Jersey, May 1988.
Associate Degree in Engineering, Electrical Engineering Technology (with High Honors),
Vermont Technical College, May 1979.
Structured System Analysis and Design, with introduction to Object Oriented Design concepts
Programming and Data Communications
VxWorks Operating System and Tools
Qualcomm CDMA system
HARDWARE: Microprocessors: Intel (8080, 8085, 8742, 8031, 8086/186/188); MC (6800, 680x0, 68332. PowerPC 7447. 7457,MPC5125 ,); Zilog Z80; ARM, Hitachi SH3-DSP, SH4; Atmel AVR, Qualcomm 8K/13K Cell Site Modem (CSM), Analog Devices Blackfin DSP
Busses/Interfaces: IEEE 488 GPIB, SCSI. JTAG, VME, PCI, MIL-STD-1553 USB, I2C (IIC), SPI
SOFTWARE: Languages: C (extensive), C++, Korn-shell,Perl Bash, PERL/Tk, HTML, FORTRAN, Forth, Ada, Informix SQL & ACE, assemblers (Intel 8080/8085, 8086/186/188, 8742, 80960; Z80; MC680x0,SH3-DSP,SH4)
OSs: UNIX, AIX, XINU, Linux, MS-DOS, DESQview 386, pSOS, CP/M, RTXC, VxWorks, VxWorks AE653, ARINC653, ThreadX, proprietary real-time kernels, Micro-Monitor
Comm: AT&T Operations Systems Alarm Surveillance Protocols: E2, E2A, TBOS, TABS, G2 (async), Datakit, X.25, T1, FDDI, CDMA (IS95), CDMA - PCS (J-008), IS95B, ISDN, SONET, TCP/IP, SNMP, Telnet, Ethernet MAC, ARP, ICMP, UDP, Sockets, ARINC 429, Williamsburg III
Other: Operations Support Systems: SCOTS, TCAS, TASC, TMAS, TRANSVU, TRANSVU II, E3; LADS,PMAS Configuration Management: Sablime, Lucent nmake, GNU Revision Control System (RCS), Concurrent Versions System (CVS), Bugzilla, Microsoft SourceSafe,Dimensions Subversion Tools: XRAY+, PROBE+, Paradigm Debugger, Tornado, Windview Apache, MySql, Cygwin, PowerPC JTAG Emulators, GNAT
10/13 to present Envisage, Inc, On Assignment with Avionics Instruments,LLC
Designed Low-Level Requirements based Test Procedures For a Digital Starter-Generator control unit (DGCU) for a commuter jet aircraft. Developed, manual, automatic and semi-automatic procedureswith the SEHAU/NOHAU EMUL-51 Emulator analyzed,debugged and tester 8051 assembly- and Keil C-Language software components as needed to develop the emulator-based test procedures. Developed Bash scripts to aid in designing SEEHAU Emulator macros for test setup.
12/12 to 7/13 Tandel Systems, Inc On Assignment with GE Aviation
Developed High level and Low-level designs from requirements for the Cockpit Voice Recorder Interface for the Data Link Manager for an avionics system. Used Structured Analysis and design techniques. Analyzed ARINC429 Williamsburg III Bit-Oriented Protocol for the Implementation. Implemented a portable Williamsburg III library. Ported to the VxWworks AE653 platform. Implemented an out of lab unit test environment over the MinGW32 tools for unit testing the CVR subsystem. Mentored newhires
10/12 12/12 Ciber,Inc on assignment with HGST,Rochester,Mn.
Design Verification testing of a Solid State Drive (SSD) design using Hewlett Packard Psuite Test System. Wrote Perl, Bash, and TCL programs to automate test administration and results report analysis Analyzed existing and designed new Psuite scripts for new test cases. Reported test progress to project leadership. Configured Psuite Systems for subsequent test Phases.
In Preparation, Analyzed C++ Solid State Drive (SSD) code to locate source of suspected defects. Analyzed legacy TCL tools to investigate changes required to accommodate new features of new drives.
1/12 to 10/12-Black Diamond Networks on assignment with Medrad, Inc.,
Executed test protocols to verify software fixes on an electromechanical Medical device.
Analyzed a persistent VxWorks 5.5 Renaeses SH-4 Processor Work Queue Panic problem in the device. Analyzed the ESMC LAN91C111 network driver to determine why it had runaway interrupts, made modifications to prevent the situation and the related panics.
. Instrumented existing application and kernel code to capture data relevant to the panic that was not available with Windview. Implemented software (Bash and PERL)tools to aid in automation of the analyses. .Analyzed the mixed C and C++ system to localize potential causes of
the panics. Rewrote portions of the LAN91C111 driver to detect occurrence of the failure that was leading to the Work Queue Panic. and reset the device prevent the panic from occurring. Redesigned portions of the driver to prevent the problem in the first place
9/11 to 11/11: Zoom Technical Services
On Assignment with Lockheed Martin, Owego, NY
maintained, designed, and executed unit tests for portable device drivers for
PowerPC-based BSPs Designed a portable device driver for a Data
concentrator that translated analog and Digital I/O to ARINC 429 messages
terminating in an ARINC653 processor. Digested the incoming messages and
provided the application parsed data structures to offload the parsing
function. Developed a generic ARINC 429 driver Architecture. Maintained source
with TortoiseSVN and cygwin svn.Used Eclipse and Wind River Workbench
IDEs. Generated parsing information with PERL scripts.
7/11 to 9/11 Consultant, Technisource, Fort Lauderdale, Florida
Analyzed bug fixes in 68hc11 controller code for a electro-hydraulic medical system for
incorporation in a similar system used TortoiseSVN for change management
5/11to6/11 Consultant, Teknavigators Corporation,
On Assignment with Parker Aerospace, Fort Worth, Texas
Verification of Do178B Requirements Based test results data for the rudder control
system of a business jet. Required parsing of logged ARINC429 messages for
the relevant Labels and fields for the test. Wrote several PERL programs to aid
in locating the desired data in the voluminous logs. Stored analysis artifacts in
MKS Source Integrity and processed Problem Reports in MKS Integrity.
9/10 to 12/10 Consultant, Advanced Technology Innovation Corporation,
On Assignment with Goodrich, Corporation, Vergennes Vermont
Software design of a Wireless Remote Data Concentrator using an MPC5125 PowerPC
with the MQX Operating system and the RTCS protocol stack. Ported the
TWR-MPC5125 MQX BSP to support the actual target processor board
Developed C code in Code warrior as well as with Cygwin makefiles. Analyzed
and reviewed the project hardware, software and system issues. Interfaced with
MPS430 processor on 802.15.4 MAC card.
2/10 to9/10: Technisource, Grand Rapids, Michigan
Analysis of changes to Requirements-based test case DOORS Modules and test applications
(RBTs)necessary due to changes in linked HLRs and LLRs For C130 Avionics
Modernization Program C130-AMP
Performed DO178 reviews of same and proposed changes to same. Executed formal test
procedures as part of the C130AMP Certification process.
11/08 to 11/09: Consultant, Advanced Technology Innovation Corporation,
On Assignment with GE Aviation, Grand Rapids, Michigan
l participate in review of requirements based tests (HLR and LLR)
l porting of test application from one aircraft platform to another for certification effort.
l Made C Source Code modifications to address Problem reports against the Software
Common Operating Environment (SCOE) as part of the 787 Common Core
l Created Documentation in Support of developing System Integration Scenarios and
Control Coupling Analysis
4/2008 to 11/08: Consultant, Coast To Coast Temporary Services,
Phoenix, Arizona;On Assignment with Ascent Healthcare Solutions,
l Analyzed a medical device's internally stored data to determine the algorithm
the manufacturer used to prevent the device from being used more than once
so that the original data could be restored, making the device look “new”
l designed several C, Perl, and Perl/TK programs to read, display and
manipulate the stored data evaluated several methods to drive the memory's
IIC interface from a Personal computer on the factory floor
l Designed a prototype hand held instrument to read the device's memory in the hospital,
so the data could be sent to the factory The base for the design was an
AtmellUSBKEY reference design with the AT90USB1287 (AVR) single-chip
l Analyzed the implementation of a position detection sensor for a medical
catheter for the purposes developing a factory functional test for the devices.
l Designed test fixtures for analyzing the position sensor system.
l Reverse engineered the three-channel Preamplifier board for the medical
device for the purpose of developing requirements for interconnection with
laboratory and factory instruments
2/2007 to 4/2008 Medical Leave
3/2006 to 1/2007: Consultant – Technisource, Kalamazoo, Michigan; On
assignment with Smiths-Aerospace in Grand Rapids, Michigan,
C-130 Aircraft Modernization Program and 7E7 Tanker programs
·Reverse-engineered a PC-based software tool (implemented in Microsoft
C++) used to control a JTAG In-Circuit Emulator automatically with
·Created program documentation and a user manual required to satisfy
DO178B certification requirements for the qualification of test tools
·Prototyped a Perl-TK replacement for the tool. Wprote a Lint-Like syntax checker in PERL to analyze existing scripts to find obscure undocumented language errors
·Analyzed crashes of the VxWorks AE653 based application The problem
originated with an exception at the application level and caused a
cascade of processor exceptions which corrupted kernel memory and led to a Work Queue Panic.
·Developed core dump and analysis tools needed to support the failure
analysis to gather data outside of the scope of Windview
·Assumed the support role for the structural coverage test scripts for the
built-in –test (BIT )Feature
·Participated in the implementation of a software download Feature for the
VxWorks AE653-based application
·Assisted others in various tasks related to BSP and Driver Development
8/2005 to 3/2006: Consultant – Tropaion, Mountainside, New Jersey; On
assignment with Sarnoff Corporation on a Software-Defined Radio project.
Advanced a prototype system to implement a MAC bridge allowing Ethernet
frame forwarding over the air.
· Reconstituted configuration management for the suspended project
with CVS on Linux
· Selected software development tools to support changes
· Analyzed the current hardware C++/C ARM controller code, the C DSP
· Studied the application for use in UAV and other battlefield applications
· Designed a MAC layer state machine that compensated for errors over
· Optimized the ThreadX C++ ARM code to increase throughput
· Added a simple FLASH file system for storing operating parameters
· Multi-threaded the system to increase throughput
· Implemented an ARP Cache for both the Ethernet and RF interfaces to
· Implemented processing of incoming ARP messages from the Ethernet (C++)
· Implemented generation of ARP requests to support outbound frames(C++)
· Implemented processing of incoming IP messages from the Ethernet interface (C++)
· Implemented processing of incoming ICMP PING messages from the
Ethernet interface (C++)
· Implemented forwarding from Ethernet to RF based upon contents of
RF ARP Cache
· Implemented incoming UDP messages, provided a port subscription
mechanism to support UDP sockets by threads
· Implemented PERL/Tk GUIs under Xwindows on Linux laptops as well as laptops running Cygwin X to support setting radio parameters from
either Windows or Linux hosts
· Implemented radio log capture tool for both Windows and Linux over
· Ported MicroMonitor to the ARM radio platform and used it to download software updates
· ARM development with the aid of Green Hills compiler and JTAG
· Analog Devices Blackfin ADSP-BF533 development with the aid of
Analog Devices VisualDSP++ compilers and APEX USB Ice Emulator
· Software maintenance with Cygwin and Linux tool kits including Bash,
Vi, X-Windows, TightVNC, CVS, WinMerge
5/2004 to 8/2005: Consultant – Technisource, Kalamazoo, Michigan
On assignment with Smiths-Aerospace in Grand Rapids, Michigan, C-130
Aircraft Modernization Program and 7E7 Tanker program
·Participated in requirements process for synchronizing time and
ARINC653 partitions schedules on multiple PowerPC VME modules.
·Designed device driver to distribute timing from a timing master to timing
slaves. Debugged driver and executed tests as part of a DO178B
·Debugged problems associated with the VxWorks AE653 operating
system configuration and with application configuration.
·Designed and built and configuration tools to augment the Wind River
AE653 Tornado tool chain using Bash, PERL, and PERL/Tk
·Participated in the configuration management and build processes for the
·Mentored other developers with respect to VxWorks development
·Debugged problems associated with the interfaces between the
automated test system and the VME chassis.
·Analyzed VME and PCI bus problems in the Tundra/Universe and
Marvel/Galileo implementation. Proposed solutions to bandwidth
·Integrated a SeaWeed OpenGl Device Driver for the 3Dlabs P9 graphics
processor to the VxWorks AE653 environment. The driver served a
PMC Mezzanine card on the PowerPC host VME card.
11/2000 to 3/2003: Senior Software Engineer - Jedai Broadband Networks,
Inc. Red Bank, NJ
Jedai was a start-up company that develops IP/voice access network elements for
the cable TV industry
· Led software architecture team for the Alpha products. Directed the work of and
contributed to the team developing the Alpha ONU product (a simple OC48
DWDM to OC12 multiplexer).
· Worked with a technology partner developing the software for an
OC12/100BaseT access device
· Worked with an outside contract design firm for an OC12/OC3 multiplexer.
Prepared the common portions of the OC48/OC12 multiplexer for use on the
· Solved software tools issues for the above products due to multiple development
platforms (Sun, Windows), multiple compiler and build tools. Set up a web based
software documentation library so that all necessary schematics, data
sheets, and specifications were available from all locations. Encapsulated all
information for each project on dedicated pages so that new hires could be
brought up to speed easily without taxing the time of the veteran developers.
· Worked with system architecture teams for the Alpha access, aggregation, head
end terminals, and Element Management System using my experience in
software, electronic, system, mechanical, and system management design.
Continued participation in the later products as the teams expanded.
· Designed and implemented the source code control system for all embedded
software products. This involved configuring and maintaining the CVS client/server
control system with a Windows 2000 server and a Linux server and Windows NT and
Windows 2000 clients. Added an Apache server and many CGI programs to
generate reports of CVS source change activity. The tools aided generating
reports for deliveries to system test.
· Applied the Bugzilla bug-tracking software for change management on a Linux
server. Customized the tool for our methodology. Integrated the Bugzilla
MySql bug database with CVS using Bash and SQL scripts. This integration
required developers to indicate which bug was associated with the changes,
verified that the bug was assigned to the developer attempting to commit the
change (and preventing the commit if necessary), and annotated the Bugzilla
bug report with the list of changed files, the file revision numbers, and the
commit comment entered by the developer.
· Developed software build systems for both developers and the production
environment for all projects. This entailed makefiles, wrapper scripts, automatic
build daemons triggered from CVS commit activity, as well as the packaging
required for delivering the software to the factory. Integrated build systems
provided with purchased software components. Evaluated a number of GPL
software development tools (code browsers, editors, debuggers, code
generators, cross-compilers, network analyzers) to reduce the purchased
license costs for Jedai, and to reduce the management overhead of purchased
· Designed a web-based Element Management System prototype around the Net-
SNMP, Cygwin, and Apache products. This product would include an SNMP
MIB browser and simple graphical representations of the customer network and
network element configurations. Special CGI programs provided for
provisioning Jedai element features that were not easily configured with the
· Designed a number of Web-base CGI tools to manage miscellaneous
development databases (prototype inventory and allocation, MAC address
9/94 to 11/2000: Senior Consultant - Tropaion Inc., Matawan, NJ
11/98 - 11/2000: On assignment at elemedia/Lucent Technologies, Holmdel,
Software-only Modem Development. Responsibilities and contributions
· Direct modifications of the development of a V.34/V.17 software modem to
be more readily distributed in a binary software library form.
· Defined and implemented the split between the modem library code and
sample user code. Prepared sample applications for delivery to customers.
· Assisted product management in product definition, feature delivery plans,
configuration planning, and negotiation support.
· Defined and executed configuration and build processes to control the quality
of deliveries to the system test organization and the customer.
· Ported the modem to several hardware platforms.
· Designed a software instrumentation technique that allowed non-intrusive
MIPS measurements down to the function level.
7/96 - 11/98: On assignment at Philips Consumer Communications,
Worked on CDMA cellular wireless telephone development. Responsibilities &
· Analysis of IS95A call processing code that was started by a former
Japanese partner of Lucent
· Ported that code from the original platform to the newer Lucent platform, and
from a Microtech Research Incorporated (MRI) compiler to a Borland
· Developed configuration management and build processes spanning from
the UNIX Sablime configuration management system to the Window 95/NT
build and emulation systems
· Developed PC-based support tools to support logging and debugging of call
· Helped convert the call processing code from the IS95A standard to J-008
· Developed data mining tools to help analyze physical layer and call
processing performance from data logged from the phones during drive tests.
· Worked on porting code from initial 80188 microprocessor-based phone to
one using an ASIC containing an ARM processor core.
· Evaluated Qualcomm MSM3000 mobile chip associated software for
incorporation into a phone
9/94 - 7/96: On assignment at AT&T, Network Wireless System Business Unit.
Served as liaison between AT&T and Qualcomm on a joint effort to port CDMA
cellular modem driver code. Responsibilities and contributions at Qualcomm’s
Colorado location included:
· Represented AT&T’s view during architectural, design and code reviews.
· Transferred information between companies.
· Set up a Bell Labs-like development environment for the Qualcomm
· Trained Qualcomm personnel on developing under UNIX.
· Contributed to porting cell driver code. This entailed: porting from the MSDOS
based Intel 80960 C compiler to the MRI Unix-based C compiler, and
then to the MRI C++ compiler; from a locally produced kernel to pSOS+; from
a complex chip set to a more integrated chip.
· Redesigned subsystems that were not part of the Qualcomm deliverables.
· Built a revision control system, and coordinated revisions
· Integrated modem systems, integrated and tested the modem with AT&T’s
cell code, and supported the modem implementation at AT&T after
completion of Qualcomm’s contract.
Responsibilities at AT&T’s Whippany, NJ facility included: Integrated modem,
operating system, and other support subsystems with the cell application code
developed by AT&T; integrated the cell code with the switch; and participated in
first 13KB CDMA call.
4/93 to 9/94: Consultant - Computer Horizons Inc., Clark, NJ
Developed test plan and procedures for large multi-host RAID disk subsystem.
Developed script-based, multi-tasking test system under AIX and X Windows on
the RS6000 for RAID system verification. The system used normal file
operations, raw device I/O, and direct SCSI I/O operations (via the SCDISK
driver) to verify and characterize RAID algorithms, design validity, throughput,
and response time. The system used parent/child relationships,
communicating via semaphore-protected shared-memory segments and pipes.
Administered several RS6000 computers being used for test positions.
Developed driver for analog to digital conversion interface on a 68332 based
circuit pack. Designed build procedures for entire project and converted the
Microtek XRAY monitor to run on the board. Developed conformance testing
procedures to support the development of a VME FDDI network card for
commercial aircraft use. Responsible for electrical, mechanical, environmental,
and software conformance. Specified the software design of a VME host
controller used to test the FDDI card. Ported FDDI code to a VME MC68020
CPU card and provided sufficient stub software so that card could emulate
FDDI card operation well enough to test the VME controller card. Produced a
PC-based script-oriented test system that managed tests executing on the
FDDI card, the host, and various peripheral cards.
12/92 to 4/93: Member of Technical Staff - Integrated Network Corp.,
Designed automatic test execution program, used as the basis for developing a
test fixture for testing circuit boards during manufacturing process. The system
included a series of drivers, abstract circuit board component models, and
canned algorithms to test circuit board models. Defined screen objects for
simulating various types of input and output devices that the tester would be
manipulating or reading.
Using the ASCII description language, the test designer described: test fixture
hardware in terms of the device driver connections; the circuit under test in
terms of the circuit models; the test procedure in terms of the objects
manipulations provided by the canned tests; the screen layout in terms of the
supported indicator types. The test execution program read and checked the
test specification, built the display screen indicators and menus automatically,
and prompted the tester for test execution.
3/90 to 6/92: Senior Consultant - Tropaion, Inc., Matawan, NJ
Modified an SCO UNIX tty device driver, which provides an interface allowing
Arabic character sets to be displayed on a variety of terminals. Modified driver
to accept color commands from the user application, to get color control
command strings for destination terminal from terminfo database, and to control
colors of the destination terminal.
Consultant to AT&T on assignments that included:
· Developed LADS 1.0 PC-XT based alarm monitoring system for telephone
central offices. Duties included analyzing the proprietary AT&T E-Telemetry
alarm protocol and devising a method to eavesdrop on the alarm traffic using
a PC. The binary alarm data was to be mapped to alarm naming information
extracted from the AT&T TMAS operations support system. Analyzed the
TMAS Informix database structure and wrote appropriate K-shell, Informix
SQL, ACE, and C programs.
· Developed PMAS 386/PC-based system to monitor alarm and performance
monitoring data for a trans-Atlantic fiber-optic transmission system.
Implemented AT&T TABS-AS&C and TABS-Path-PM protocols on an eight-port
expansion card. The system used DESQview 386 API to provide multitasking
window-management and menu execution needs. Used MKS Toolkit
to provide K-shell user interface windows and dial-in capability. The system
logs alarm events, thresholds and performance data, provides history and
present-state summary reports. Currently in use in 5 countries.
· Developed LADS 2.0, which required modifying system to support 4 ETelemetry
facilities, 8 remote display terminals, and external aisle pilot
indicators. E-Telemetry facility was re-engineered to allow LADS 2.0 to
monitor the protocol to extract information like LADS 1.0, but to take over the
polling functions in the event that the E-Telemetry central stops polling.
Tasks included selecting modems, bridges, PC-controllable facility switches,
remote terminals, and electrical and mechanical design of the interconnects
between these components. The LADS 1.0 was ported to the PMAS
DESQview/MKS platform and expanded to support the multiple facilities and
external pilot panels. The Informix code was expanded as needed and data
compression was used to speed the database transfer process. The
database and log reporting techniques of the PMAS & LADS 1.0 systems
were merged and expanded to support needs of different customers.
11/87 to 3/90: Design Engineer - Telecom Analysis Systems, Eatontown,
Designed high speed synchronous/asynchronous serial communications test
set. Duties included functional specification, designing multiple-80C188
processor boards, porting XINU operating system to the boards, and designing
system architecture and application software. Managed work of 2 other
programmers. Brought product design from concept to manufacture. Designed
software tools, startup code, and libraries necessary to allow use of an MSDOS
native compiler for embedded code development for the system. Code
modularity and portability allowed 60% to 70% of the 80K lines of code
representing the operating system, ASYNC and GPIB control interfaces, and
front panel menu system to be ported to a new ISDN test set on a similar
hardware platform in 2 afternoons.
6/79 to 6/87: Technical Associate to Member of Technical Staff - Bell
· Participated in software specification and operational firmware design for
80188 based "wrapper" processor board used in modems. Responsible for
system analysis, analyzing implementation of communications protocols,
designing unit front panel menu control system, and designing program
building tools to support 80188 code cross-development on UNIX.
· Designed an 8085-based surveillance terminal for AT&T Operations
Systems. Defined software and hardware architecture and participated in
software design for a 80186 based protocol converter that concentrates four
E2A protocol links to a single point-to-point link with a UNIX host processor.
· Designed an IBM PC based E2A protocol communications analyzer.
· Participated in architecture design of new AT&T UNIX based Operations
Support Systems. Had primary responsibility for defining the
hardware/firmware/software architecture and components necessary for the
distributed communications fabric used by the systems for event gathering.
Analyzed, performed needs evaluation and specified network configurations
of private multipoint data facilities, dial-up networks, data multiplexers, and
· Developed system test tools on UNIX, PC and embedded platforms. Did
extensive development on Hewlett-Packard 64000 and 64700 processor
development systems. Wrote an MS-DOS API to run on an Intel 80188
based co-processor board to allow simple embedded-DOS applications to
run on the board without modifications. Ported XINU operating system from
LSI-11 to run under MS-DOS.