STEPHEN T. NGUYEN

**** ****** ***

Plano, Texas 75025

(214) 886 – 5909

acy3tv@r.postjobfree.com

U.S Citizen

OBJECTIVE Seeking a challenging Systems/RF/Test/QA/Field/Technical Support Engineer position in Communications and Network Systems to utilize knowledge gained from education with special interest in RF, Femtocell, LTE, Wireless – Nokia and Alcatel-Lucent, Ericsson (CDMA, GSM, UMTS, 4G LTE, Systems, and Cellular Handsets), LMR (Land Mobile Radio – P25), PBX, GPS, Network, SoftSwitch, VoIP, IPTV, DSL/ADSL, Software and Hardware Development.

EDUCATION THE UNIVERSITY OF IOWA, Iowa City, Iowa.

B.S.E.E., Bachelor of Science in Electrical Engineering, 1991.

COMPUTER SKILLS

C, UNIX, Linux, SQL, ClearQuest, ClearCase, DOORS, Test Director, HP Quality Center, ADA Programming, Labview, Microsoft (Excel, Word, Power Point,…)

CCNA, BGP, MPLS

WORK EXPERIENCES

CommScope Corp., Richardson, Texas.

06/2011 - Present Sr. PON (Passive Optical Network) Technical Support Engineer

Coordinate/schedule/track engineering tasks, establish specifications for changes/additions, Pre/Post Sale Technical Support; keep customer informed of progress/changes to schedule; and provide technical support to customers at installation of new features.

Developed and planned from the concept to the product development.

Developed technical, training documentation, system interfaces, integration specification, training materials, procedures, reports problems.

Installs/troubleshooting within internal/external clients network problem in term of hardware and software issues.

Documents/plans and recommends network design and upgrade HW/SW to meet customer requirement.

Experienced with ISO; Layer 2, 3 Network Architecture technologies.

Defined drive routes (MPLS, OSPF, BGP, IS-IS, Vlan testing conditions based on project requirements.

Fixed/installed Software/hardware and monitor network faults. Schedule network maintenance after hours.

Analyzing test output, reporting bugs, verifying bug fixes, and review technical documentation based on Software Applications.

Hand on and in depth know-how of network architecture, SIP protocol, HTTP, SIP, DNS, LDAP, Streaming Protocols, RTP, RTCP, and TCP/UDP/IP, IPv4/IPv6, SNMP Management.

Experienced about next generation network technologies like: PON (E/GPON, DPoE – TWC/BHN/CableLabs, Comcast, Charter, CableVision).

Experienced with system FTTP, FTTC and FTTH for E/GPON, DPoE and ONTs (SFU-Single Family Unit, MDU-Multiple Drilling Unit-WiFi), Set Top Box (STB) testing triple play solution for voice, data and video for data down stream up to Gigabit per second.

Excellent communication skills and flexibility in job assignments.

Alcatel- Lucent Inc., Plano, Texas.

01/96 – 06/2011 Sr. Systems Integration & Test Engineer.

CDMA, GSM, UMTS, 4G LTE, LMR, RF, WiMax, IPTV, IMS, VoIP

RF Engineer

Coordinate/schedule/track engineering tasks, negotiate/establish specifications for changes/additions; keep customer informed of progress/changes to schedule; lab setup, and provide technical support to customers at installation of new features.

Performed analysis of measured data, in order to modify network design and enhance performance. Ensure the deployment of an optimum system, the service provider in line with the objective and the strategy adopts service coverage. (eg; SOW, SLA, E911 configuration management, LMR Motorola/EF Johnson, P25 700MHz digital trunk, Public Safety Answering Point – Support PSAP for new deployment phase, OTAR and OTAP, validation and testing two way radio system)

Developed test beds, test plans, test site scheduling, site survey, equipment calibration and setup, RF signal measurement and data analysis (e.g: Antenna/Tower, Tx/Rx, Repeaters, RF Coverage, RFI (Radio Frequency Interference), HF (3-30MHz), VHF (30MHz-300MHz), UHF (300MHz-3GHz).

Performed microwave interference analysis as prior to actual RF transmission from a base station of a wireless network, remove or relocate microwave links to avoid any interference caused by the wireless system.

Experienced with Nera; Microwave radio relay systems, telecommunications management networks, and mobile satellite communications systems (VSAT)

Defined the requirements and establish the design criteria to identify the network planning tools to use and the required databases.

Identified base station sites for system coverage provision, and perform site surveys with other network implementation teams, in order to verify suitability of the sites for zoning acquisition and construction.

Implement high performance operational wireless networks which include initial RF network design, re-design, regular design reviews, RF build verification, system RF acceptance, IRAT (Inter Radio Access Technology) procedures (Handover video to GSM/UMTS, 2G vs 3G HO), optimization and continuous technical support to all deployment teams.

Interacted with Software Development team when receive problems or tracking problems. Keep teammates informed about any problems seen while testing, test tool (TEMS, Actix, Agilent).

GSM, UMTS, 4G LTE, RNC/UTRAN, CS/PS Engineer

Contribute and work closely with the sales team (Pre/Post-Sales), customers, NOC, TAC, and technical teams by providing architecture, promotion packages, system specification documentation for the E2E, Femtocell, LTE requirements and road map information related to products covered by the role.

Developed test beds, test plan, test procedures/scripts, test cases, regression test, MOPs, GUI, UAT/ATP, Client/Server Web Application, API,, HP Quality Center, Test Director, Spirent Test Center based on test requirements extracted from hardware and software functional specifications, and product required documents.

Developed technical, training documentation, training materials, procedures, reports, and Computer Based Training (CBT) products.

Working knowledge of Database (SQL, Oracle, Sysbase), OS (Windows, Unix, Linux, Solaris, AIX).

Experienced in deployments with Layer 2, 3 technologies, RLC, RRC, DPCP, TCP/IP, IGMP, RTP, RTSP protocols.

Automated and manual testing; QXDM, Data KPI and tools, analyzing test output, reporting bugs, verifying bug fixes, and review technical documentation based on Software Applications.

Experienced testing and troubleshooting products CDMA/EVDO, GSM, UMTS, HSDPA, GPRS, SGSN/GGSN (Gr, Gn, Gi, Ga Interface), UMA, WiFi, OSS, BSS/RAN, OMC/RAN, BTS/NodeB, IuCS, IuPS, Iur, Iub,…

Experienced in debugging, analyzing, capturing, and generated software problem reports when test case failures in Gn, Gi, Gr, Ga link, GPRS (SGSN/GGSN) network, IP phone, Handset SIP Phone.

Experienced and understand in UMTS wireless infrastructure protocols in IP core, data, IP QoS, and L2/L3 IP network architecture.

Strong knowledge in IP based networks, Cisco 7609 (MAR/OAR), Cisco 12410 (IAR), Cisco 4948/6509 (OAS), BGP Internet Service, OSPF, MPLS,…

Create/Prepare/Update work orders/Trouble tickets/Status (Remedy, PVCS, DDTS, ClearQuest, ClearCase…) report for every issues related to systems or components, address customer request/issue include installation/configuration, software/hardware upgrade throughout demo/trails/migration to customer labs and production.

UMTS – NPI, Worked on Nokia-Siemens and Alcatel-Lucent Wireless, Ericsson/Nokia (BSC/RNC and UTRAN), and T-Mobile on GSM, HSDPA, GPRS, UMA (Alcatel/Spatial)

UMTS – NPI, Configuration/Provisioning/patching/software upgrade and turn up BTS/Node B, BSC/RNC Wireless Media Gateway (WMG) and Wireless Soft Switch (T1, SS7, CAS, BRI, ISUP, AAL2, AAL5 Verified all calls M-M, M-PSTN, HON 2G-3G

WRAN Integration (NodeB-9313/1120, RNC-9370, Integration/Rehome, RNC re-balancing, T1 Adds, MOP creations, validation, troubleshooting, providing support (new, expansions, re-configurations with NDI services).

Experienced in OSS, Node B, RBS (Sun/Unix, Moshell/AMOS, ProComm, HyperTermial, Citrix, UltraEdit, FTP, Telnet,…)

Experienced in IOT, call processing, Node B, RBS (Moshell/AMOS), RNC, (CIQ/Data Fill, Rehome, scripting, expand Iub links, configure/activate UCU card, and perform T1 add on…)

Verified/Tested MSN and RBS - working T1’s, IMA link, Alarms, AAL2 paths, Traffic Descriptor in Tellabs and Alcatel (e.g: UBR/PIR/MIR in 5620 Network Management, ATM-7670, Tellabs 8860 Multiservice Router).

Verified/Tested RNC/NodeB/MSN - Healthcheck, Pre_check, Post_check, T1 verification, ETMC card, create IMA group, and add corresponding to IMA links, T1 status in MSN (Multiple Switching Node) and RBS, VC (IMA1&2 for ATM transport configuration).

IPTV, CVoIP, IMS Engineer

Experienced about IPTV (AT&T - Uverse) is provided in conjunction with VOD (Video On Demand) and may be bundled with Internet Service referred to as Triple Play service such as Web access and VoIP.

Experienced about next generation network technologies like: PON (EPON/GPON – TWC/BHN/CableLabs) – eg; GPON-Gigabit Passive Optical Network (single optical fiber is typically 32 and it consists of OLT (Optical Line Termination) at the service provider’s central office and a number of ONUs (Optical Network Units) near end users.

Testing Lightspeed 7750 (IP Routing-BSR-Broadband Service Router), 7450 (Ethernet Switch-BSA-Broadband Service Aggregator), 5620 SAM (GUI-Oracle DB), 7330 (FTTN Access), 7340 (FTTP Access), 5526 AMS (Access Management System), etc… Comprehend/assess networking/product issues as related to Triple Play (IP Architectures) integrated solution, defined by Alcatel & End Customers.

Develop test plan and test execution, ATP (Acceptance Test Procedures) for IP Service Assurance and Analysis of Connection with test modules support IPTV, VoIP, FTTx.

Experienced with system FTTP, FTTC and FTTH for GPON, BPON and ONTs (SFU-Single Family Unit, MDU-Multiple Drilling Unit-WiFi), Set Top Box (STB) testing triple play solution for voice, data and video for data down stream up to Gigabit per second and HDTV

Systems Test Engineer VoIP, IMS

Responsible for defining, scheduling, development maintenance, and custom release based on major feature releases, plus specifications for changes/additions for new and existing products based on customer feedback.

Developed and planned from the concept to the product development.

Developed test plans, test procedure, and test cases for VoIP, PS/CS Call, IMS/Push-To-Talk/Push-To-Show, and PoC features based on specifications, 3GPP Standards, MRS.

Experienced in testing tool DebugMux, Wireshark/Ethereal, Empirix, TSP, Package capture and analysis, DNS and global load balancing.

Hand on and in depth know-how of VoIP, IMS architecture, SIP protocol, HTTP, SIP, DHCP, DNS, LDAP, Diameter, Streaming Protocols, Presence, RTP, RTCP, XCAP/XML, and TCP/UDP/IP, IPv4, SMTP, SNMP Management.

Developed test plan, test procedures/scripts, test verification, UAT, (automation and manual) based on test requirements extracted from hardware and software functional specifications, and product required documents. (eg; HP/Mercury Interactive testing tool – Quality Center/Test Director).

Developed C/UNIX for coding, debugging, and testing (SUN, HP 9000/3070).

Experienced in writing scripts for automated test suits for regression, stress test, and documentation test results using TAPI (Tcl/tk), TestExpert, Test Director,…

Experienced SoftSwitch, Broadsoft testing, hands on testing with VoIP, VoATM, Voice networks using H.323, and voice response systems (T1/E1, SNMP, Codec G.711, G.729) and deploys automated test voice products (TDM, SS7, CAS, BRI, ISDN, DTMF, VGW, MGCP, GWC, H.248, AIN, Cisco).

Analyzed new technologies and solutions, visioning new technical possibilities and educating R&D, marketing and management.

02/92 – 01/96 DSC Communications Corporation, Plano, Texas.

Sr. Systems Integration & Test Engineer

Coordinate/schedule, develop, interface with multiple internal group, and support full range of technical/product development requirements to resolve problems associated with failing test cases

Developed test plans, test cases, configuration, controlling test systems, analysis products for support of system test and evaluation (SUN, HP-9000).

Integration and test a large high level software/Network Management Systems, testing of Switching Systems and Network Protocols (SS7, PBX, ATM & Frame Relay (Frame/Packet Switching, Cell Relay/ATM), TCP/IP, ISDN, SONET).

Worked on SONET measurement STS-1, OC-1 up to OC-48 transmission and multiplex testing, alarm stimulus/response testing, overhead and path trace programming and display, and clear channel OC-3 testing.

Worked on ATM measurement with variable rate cell generation for DS1, DS3 or OC3 rates, cell delay, cell loss count, cell loss ratio, traffic and performance analysis, alarm monitor, PVC, SVC, CAC, SNMP, MIBs, LMI, Congestion Handling, and ejection (AAL1, 3&4, 5, and VP/VC rates).

Worked on Switch/Cross-Connect systems. Integration and test of large software/Network Management Systems; computer network and network protocols.

Experienced in writing scripts for automated testing (LoadRunner, WinRunner, SUN, HP).

Knowledge of the purpose and process for reviewing specifications, design documents and code.

Experienced in problem tracking tools, coordinating and supporting failure review, analysis, corrective action, and hand-on experience in the lab environment.

Worked as both an individual contributor and as part of multi-disciplinary teams

Excellent communications and customer skills.

06/89 – 01/92 Network Engineering Consulting, Iowa City, Iowa.

RF/System Engineer – Nortel Networks Division.

Performed analysis of measured data, in order to modify network design and enhance performance. Ensure the deployment of an optimum system, the service provider in line with the objective and the strategy adopts service coverage.

Developed test plans, test site scheduling, equipment calibration and setup, RF signal measurement and data analysis.

Performed microwave interference analysis as prior to actual RF transmission from a base station of a wireless network, remove or relocate microwave links to avoid any interference caused by the wireless system.

Defined the requirements and establish the design criteria to identify the network planning tools to use and the required databases.

Identified base station sites for system coverage provision, and perform site surveys with other network implementation teams, in order to verify suitability of the sites for zoning acquisition and construction.

Implement high performance operational wireless networks which include initial RF network design, re-design, regular design reviews, RF build verification, system RF acceptance, optimization and continuous technical support to all deployment teams.

Excellent technical and verbal communication and interpersonal skills.

ACHIEVEMENT Certificate of Achievement in the Supervisory and Management.

ATE Systems, T-Berd 224, Fire-Berd 6000, Sage 903A, Oscilloscopes, INET, SS7, Understanding Wireline & Wireless, Data Network/Communication, LAN/WAN Networks, Networking, Network/Spectrum Analyzer, Signal Generator, Power Meter, Antenna, Tx/Rx Signal, IPv4, GSM (Rhode & Schwarz - CMU 200), WSS (Wireless Soft Switch), WMG (Wireless Media Gateway), Nethawk Analyzer, Distributed Network Analyzer (HP-DNA), Spirent Test Center, Empirix/Hammer Analyzer, Wireshark, Empirix XMS Analyzer, Abacus 5000, UMTS, SGSN/GGSN, GPRS, HSDPA, TEMS, Actix, Agilent, Flexi BTS, Anite Nemo, Nera.

ALU FTTN 7330, 7340, 7342, E/GPON, Light Speed IP Routing 7450, 7750

AWARDS & Outstanding Honor Mathematics and Sciences, The University of Iowa.

ACTIVITIES Member of Institute of Electrical and Electronic Engineering (IEEE), The University of Iowa.

Interested in travel, swimming, soccer, and reading scientific materials.

REFERENCES Available upon request.

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