Joseph Chen

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Currently involved in IPv6 testing of DoD voice features such as Multilevel Precedence and Preemption (MLPP), Assured Services SIP Trunk (AS-SIP) and V.150.1 secured endpoints.

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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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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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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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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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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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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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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.