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Joseph Chen
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RTP, NC
chenj@cisco.com
919-923-4119 cell
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Summary
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20 years of software
design and test experience in Voice over IP (VoIP) and wireless related
products including Cisco Unified Communications Manager (CUCM), Voice
Gateways (SIP, MGCP, SCCP and H.323), 802.11 WLAN and cellular wireless
(GSM, TDMA, CDMA, 3G UMTS). Experience in C, C++, TCL, Perl and
PHP.
Looking to lead a project
in software development or testing in the VoIP or wireless area.
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Experience
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Cisco Systems (2000 -
Present)
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Mar 2008 – Present
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Software Engineer IV /
Technical Leader
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RTP, North Carolina
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In
Government
Solutions
group focused on addressing Department of
Defense (DoD)'s unique requirements. Implementing and test global
government required features that impact Cisco public sector revenue
through the $400M mark.
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Working on VoIP technologies
including Cisco Unified Communications Manager (CUCM), IP Phones, PSTN
(FXS/FXO/T1 PRI/T1 CAS/E1) and Analog Gateways. |
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Year 2011-2012 - Currently testing AS-SIP
(Assured Services on SIP) line-side for UCR 2008 Change 3 requirements
Year 2010-2011 - Tested V.150.1 MER secure endpoints
Year 2008-2009 - Tested IPv6 on DoD features such as Multilevel
Precedence and Preemption (MLPP)
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Sept 2006 – Mar 2008
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Software Engineer IV
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RTP, North Carolina
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Team lead for Quality of Service (QoS)
feature testing effort on next generation router platform. Project
entails developing over 500 baseline test cases for functionality,
system level testing, stress, performance and scalability testing of
QoS across 9 new platforms (HW/SW changes). |
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Developing scripts for automating over 90%
of the QoS test cases using TCL language, in-house tools and 3rd party
tools (i.e. IXIA) for data and voice traffic generation.
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May 2004 – August 2006
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Software Engineer IV
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RTP, North Carolina
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SIP development testing on Cisco
CallManager Express (CCME) - leading feature testing of "Click to
Dial" functionality using Out of Dialog Refer (OOD-R) SIP primitive. |
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Led or co-led development test team in 4
VoIP projects involving Cisco CallManager (CCM), CCME and Voice Gateway
(VG224) to allow mid line enterprise customers using PBX or analog
phones to easily migrate to VoIP infrastructure. Project involved
testing and automating tests to cover PBX/Keyset features such as
caller id, call waiting, transfer, conference, park, pickup, shared
lines, modem/fax relay, etc. First project has been released in
12.4(2)T and successfully deployed to several key retail customers.
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March 2000 – April 2004
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Software Engineer IV
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San
Jose, California
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Worked on next
generation 802.11g wireless bridging product using Cisco's IOS
operating system. Area involves VLAN, association management and
inter access point messaging.
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Developed software on Cisco's
802.11 wireless LAN (WLAN or Wi-Fi) access point products – AP340/350
VxWorks based AP, AP1100 IOS based AP, AP1200 dual-mode 2.4/5Ghz AP and
AP1410 802.11a high speed wireless bridge. Worked
on VLAN and
security related features.
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Worked on Cisco's Mobile
Office Network (MNET) product, which is a combination of a GSM and
H.323 voice over IP solution. Worked on a
feature called "External Handover" which allows the user to seamlessly
hand in and out of the MNET and public GSM network (PLMN).
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Filed for patent idea
#144908 "System and Method for Performing a Handover in a Communication
System" which eliminates the need for signaling and bearer path tunnels
in wireless VoIP systems.
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Developed 3G Voice over
IP (VoIP) wireless architecture using standards set by 3GPP. Wrote system functional specifications for
next generation Home Subscriber Database and Location Service Node. Developed message flows using IEFT open
interface protocols, SIP and MGCP between network components.
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Nortel Networks (1992 -
2000)
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May 1996 – March 2000
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Senior Engineer
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Richardson,
Texas
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Project leader for
"Knowledge Based Handoff", a set of features designed to increase
cellular network intelligence for smarter and faster handoffs.
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Designed a "Hierarchical
Cell" high level design which uses multi-level cell structures and
mobile velocity information to increase call capacity in an area.
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Filed for patent idea
#RR2689 "Handoffs Based on Mobile Velocity in a Hierarchical Cell
Structure".
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In the 1997 software
release, designed and implemented Mobile Assisted Channel Allocation
(MACA) and headed integration for N=4, phase 2 (radio related) features.
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Worked on Sprint
Interoperability A-Interface, which is an open interface standard
(IS-634) between the MSC and BS. Carried a CDMA A-Interface OA&M
feature from high level design to finished status. This feature
required coding, unit and integration testing Qualcomm BS software
using C++.
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June 1992 – May 1996
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Software Engineer
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RTP,
North Carolina
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Design, develop and
modify DMS-100 software for the Multi-Vendor Interface (TR-303)
project. TR-303 (now GR-303) is the Bellcore standard for Integrated
Digital Loop Carrier (IDLC) systems that enable the interconnection of
the DMS-100 switch to a 3rd party access vehicle. This project involves
areas in call processing, provisioning and maintenance on POTS, ISDN
and in the future P-PHONES agents.
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Involved in a Generic
Service Framework (GSF) project to implement TR-303 on GSF. Responsible
for analyzing and managing interactions between GSF and TR-303
components and converting legacy DMS code to Object Oriented Protel-2
and C++.
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Carried various features
from design requirements to integration tested status. Features covered
areas in call processing, line provisioning, line maintenance, static
data, and table control. Owner of 8 switch modules for TR-303 Line
Provisioning and 10 peripheral modules for TR-303 Call Processing, PSTN
state machine and ABCD robbed-bit signaling code.
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Edicon, An Eastman Kodak
Company
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1987 – 1991 (summers)
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Summer Intern
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Rochester,
New
York
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Assisted in design and
development of an Access Control and badging system for Edicon’s
security system. Used OS/2 Presentation Manager development kit and C++
language.
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Provided software
demonstration to peers and management team.
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Generated user's guide as
well as internal development documents.
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Education
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Rensselaer Polytechnic
Institute
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May 1992
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M. Eng in Computer
Engineering
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Troy,
New York
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May 1991
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B.S. Mechanical
Engineering
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Troy,
New York
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Additional
Information
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ScrumMaster Certification
#116766 by ScrumAlliance, 2010
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Certified Wireless
Network Administrator (CWNA), 6/2003
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Cisco Certified Network
Associate (CCNA), 11/2002
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Volunteer “Chess in
School” teacher for elementary students
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Member of Swain Ski
Patrol from 1987-1991
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