Abdul Subhan Mohammed                                                                                           

masubhan@gmail.com

Cell: 404-358-6466

Atlanta, GA

 

Summary:

 

•         Over 12 years of professional experience in the telecommunication industry; as Delivery Lead and Senior Technical Architect responsible for Integrating, Testing and deploying VoLTE, IMS, IP Telephony, OSS/BSS, Unified messaging, eSRVCC, CSFB, E911, IRAT LTE, 3G, 2G, and Collaboration networks.

•         Worked on multi-year, multi-phase program to systematically overhaul legacy voice services on to modern communication services infrastructure.

•         Worked closely with business units and the technology teams for constant improvements.

•         Experienced in the identification and definition of business and design requirements in order to identify and define testable requirements.

•         Act as a subject matter expert and technical lead for IMS/VoLTE service deployment for GM/OnStar including eSRVCC, CSFB, E911, IRAT LTE, 3G, 2G.

•         Responsible for Planning, Designing, Installing, Upgrading, Integrating & Supporting complex Mobile LTE, 3G, VoLTE, IMS and messaging networks.

•         Experience in integrating Diameter Signaling Routers (DSR/DEA), Policy Control Routing Function (PCRF) and Subscriber Data Management (SDM) with core networks.

•         Experience in VOIP, IP Telephony, Voicemail/Unified Communications Application servers, Audio/Video Conference applications servers, Data Collaboration, Solaris, NetApp, Procom, Linux, VMWare, Routing, switching, VOIP with strong Cisco hardware/software experiences.

•         Extensive experience in test effort estimation, resource allocation, risk/contingency planning, project planning, execution, tracking, creating and providing management with detailed documentations on all testing results, defects identifications and resolution

•         Responsibilities include troubleshoot, maintain, upgrade, and provide solutions to complex hardware/software problems.

•         High-level understanding of Software-Defined Networking (SDN), Hypervisor, Network Function Virtualization (NFV) and Network Virtualization (NV).

•         Responsible for creating Acceptance Test plans, platform migration plans, Upgrade plans and delivery plans.

•         Good knowledge and experience with layer 2 technologies like Ethernet, VLANs, Spanning Tree protocol.

•         Aggressive solver, technically precise, Analytical Thinker, Sharp troubleshooting skills, excellent written and verbal communication skills, especially with respect to technical documentation/support. Proven track record as an individual contributor and as a member of a team.

 

Education and Certifications:

•         Master of Science (Computer Science)

Osamnia University, Hyderabad, India.

•         CCNA

•         PMP (Project Management Professional) certification course

 

Hands-on Technical Skills:

 

Voice over LTE (VoLTE), IP Multimedia Subsystem (IMS), RCS, LTE, Evolved Packet Core, Circuit Core, Packet Core, Subscriber Data Management (Registers), AAA, SS7, SIP, Diameter, VoIP, CRM, Billing, 2G, 3G, I-HSPA, 4G, Cisco Switching and Routing.

 

• Voice Gateway and Signaling •

• SIP • SS7 • MGCP • SBC • E1 • PRI • CAS • R2 • ISDN • H323 • FXO • SCCP • FXS • RAS • T1 •

 

• Protocols •

• SIP • Diameter • SS7 • MGCP • RTP • CRTP • H.323 • R2 • ISDN • IPX/SPX • Net Bui • TCP/IP • RIP v1, v2 • IGRP • OSPF • BGP • EIGRP • Frame Relay •

 

• Voice CODEC •

• G711ulaw • G711alaw • G729 • G723 •

 

• Call Admission Control •

• Location-based • RAS-based • SRST• Find-me-Follow-me • Auto Attendants • Call Forwarding/Diversion • Hunt groups •

 

 

• Operating Systems •

• Sun Solaris 5.8, 5.9, 5.10 • VxWorks • Red Hat Linux 6.0, 6.2, 7.0 • Dos 5.0, 6.0, 6.20, 6.22 • Windows 3.1, 3.11 • Windows 95, 98, ME, 2000, XP • Windows NT 3.51, 4.0 Standard/Enterprise Server Edition • Windows 2000 Standard/Advanced Server Edition •

 

• Hardware •

• HP C7000 enclosure servers • Sun Netra • Cisco Router’s (1700, 2600, 3600, AS5300, AS5350, AS5400, 7200) • Mereon Media Server • Teles iGate • Orion • Valiant • Quintum • Nuera • Mobiline • Sipura • Satellite/ISDN Modems • Compaq • Dell • IBM • HP • Notebooks and Servers •

 

• Soft Switches •

• Cisco Call Manager 4.0 and 5.0• Mera • Asterisk • Sylantro • Carrius • HiQ • Sysmaster •

 

• Storage •

• NetApp ONTAP (2020, FAS270, FAS270c) • Procom • EMC •

 

• Web Server’s •

• IIS 3.0, 4.0, 5.0 • Apache Web Server • Java Web Server • Web logic •

 

• Database •

• Oracle 9i • SQL Server 6.0, 6.5, 7.0, 2000 • 

 

•Monitoring Tools & Analyzers •       

•MRTG • PRTG • Ping Monitor • ORION Solar winds • Nagios • Cacti • IP-Tools • Host Monitor • What’s Up • LAN Guard •

 

• Telnet Software •

• Secure CRT • CRT • Putty •

 

Professional Experience:

 

Cox Communications (Employer GlobalLogic Inc)              June 2015 – Jan 2016

Delivery Lead

Responsibilities:

·   Responsible for Orchestrating and Governing IMS Program testing efforts for effecting 100+ applications including IMS and Voice Network Systems, OSS, BSS, Service Assurance and Security and Alarming systems.

·   Managed war room activities, involved with command center, and on-going support and business process reviews and updates of issues/defects/etc as needed. 

·   Developed test plan and test strategies and ensured sufficient coverage for both Positive & Negative testing 

·   Performed functional decomposition of requirements for developing Test Cases using HP Quality Center/ALM 11.0 

·   Analyzed system requirements and created test cases and test scenarios against Business rules 

·   Utilized all possible resources to gather accurate requirements 

·   Facilitated QA daily calls meetings/calls, updated, followed up, escalated overdue issues, and maintained agenda 

·   Assisted the Production Support Organization leadership team in reducing the number of production tickets and reduced defects backlog by 85%. 

 

 

 

AT&T (Employer GlobalLogic Inc)  June 2013 – December 2014

Senior Technical Architect

Responsibilities:

·   Act as a subject matter expert and technical lead for IMS/VoLTE including eSRVCC, CSFB, E911, IRAT LTE, 3G, 2G. 

·   Write technical description, design, and architecture documents. 

·   Develop technical presentations, network diagrams and proposals. 

·   Manage and host online meetings and work with cross-functional teams from different AT&T offices around United States to deliver the project.

·   Develop testing strategy and writing of test execution manual.  

·   Lead a group of testing engineers to execute the test cases. 

·   Mentors and provides technical guidance and explains advanced concepts to others in the team.  

·   Troubleshoot escalated defects found during testing by analyzing traces from both Packet Core and IMS using JDSU, Techtronic’s IrisView, QXDM, and Wireshark. 

·   Conduct knowledge transfer meetings and present the VoLTE solution to AT&T’s automotive customer GM/Onstar.

 

Tekelec (Employer GlobalLogig Inc)February 2012 – March 2013

Professional Services

Responsibilities:

•         Responsible for Planning, Designing, Installing, configuration and administrating Tekelec’s Diameter Signaling Router(DSR/DEA), Policy Control Routing Function (PCRF) and Subscriber Data Management (SDM), HP C7000 enclosure servers, Cisco and HP switches.

•         Responsible for Integrating and Interoping Tekelec’s products in LTE, 3G, & IMS networks.

•         Maintained, owned and updated Standard troubleshooting procedure, Acceptance Test Plans, End-to-End test plans.

•         Work closely with personnel of partners and end customers to set and meet their expectation, handle and resolve escalations and earn customer satisfaction.

•         Worked closely with LTE, 3G and IMS interfaces like S6a, S6d, S9, Sh, Gx, Gxx, Rx, Cx, Dx, Dh, Rf, Gy and Ro.

•         Conducted complete project scoping, business requirements definition, project management, and delivery. Implement next-generation network architectures, Voice over IP, and quality of service (QoS) measures on IP networks.

•         Familiar with MME, HSS, PCRF, SGSN, GGSN, PGateway, AS, P-CSCF, S-CSCF/I-CSCF and OCS/OFCS.

 

Movius Interactive Corporation (Employer GlobalLogic Inc)          March 2005 – February 2012

Team Lead & Manager Product Support

Responsibilities:

•         Responsible for Planning, Designing, Installing, configuration and administrating Voicemail/Unified Communications Application servers, Audio/Video Conference applications servers, Data Collaboration, Solaris 5.8, 5.9 and 5.10, NetApp ONTAP, Procom and Linux servers.

•         Maintained, owned and updated standard troubleshooting procedure, install guide, upgrade planner, employee training program, and CRM tools management.

•         Work closely with personnel of partners and end customers to set and meet their expectation, handle and resolve escalations and earn customer satisfaction.

•         Oversee all operations and functions of support group providing technical support to more than 200 carriers and enterprise customers. I was technical Prime for KPN(Netherlands), ComHem(Sweden), Orange(France), Du(Dubai), STC(Saudi Arabia), Mobily(Saudi Arabia), Qtel(Qatar), Telecom Malaysia(Malaysia), NEC(Japan), KDDI(Japan), NTT(Japan), Setar(Aruba), Cemig(Brazil), CBeyond(USA) , Cablevision(USA) and Sprint(USA).

•         Monitor daily activities and KPI’s (Key performance indicators) to ensure compliance with all SLA's (Service level agreements).  Compile and analyze data, prepare weekly and monthly reports on cases and outages for senior management.

•         Conducted complete project scoping, business requirements definition, project management, and delivery. Implement next-generation network architectures, Voice over IP, and quality of service measures on IP networks.

•         I have also developed disaster preparedness assessments and recovery plans. Developed specs and project plans for redundant storage, backup systems, and point-of-recovery planning.

 

Ping2Ring Int’lAug 2003 – March 2005

Senior Support Engineer

Responsibilities:

•         Designed, implemented, supported, and documented a backup datacenter LAN and WAN.

•         Part of the Network Services team in a Cisco LAN/WAN & AS400 environment supporting 200 remote branches utilizing ATM/Frame-Relay and EIGRP.

•         Configured, implemented, and supported a Cisco controller based Wi-Fi solution.

•         Provided project management assistance for data center cabling, documented all network drawings using Visio.

•         Developed and documented standards for network configurations, roles, responsibilities, and disaster recovery configurations as well as network security standards for network devices.

•         Implemented an NTP solution, configured SNMP and Sysloging of all network devices.

 

 

Major Projects Handled

 

Verizon MultiVendor IOT (Ericsson, Alcatel-Lucent, Cisco and NSN)

Description: - To consolidate and optimize all of the Mobile and IMS networks Verizon decided to streamline Diameter traffic. They selected Tekelec’s Diameter Signaling Router and wanted all of their Network vendors to Interop and come up with Gold standards in Lab so that DSR can be deployed in production. Being the lead engineer on this project I interacted with all vendors on specification and timers of all Ericsson, Alcatel-Lucent, Cisco and NSN.

Responsibilities are as follows:-

·   Discuss specifications with all vendors and agree on timers.

·   Install DSR servers in lab and test Diameter interfaces of all Vendors.

·   Create scenarios as that of Verizon production network and simulate in lab with vendor elements.

 

Rogers LTE Roaming

Description: - Rogers Communications Inc. is one of Canada's largest communications companies, particularly in the field of wireless communications, cable television, home phone and internet with additional telecommunications and mass media assets. Rogers used Tekelec’s Diameter Signaling Router to launch LTE Roaming with Roaming vendors. They used DSR Mediation and Topology Hiding features to hide core networks with roaming vendors and partners.

Responsibilities are as follows:-

·    Worked with installing DSR in lab and integrate with production Ericsson MME and HSS.

·   Test attach and call-flow in lab with Ericsson MME and HSS.

·   Perform complete end-to-end testing, Mediation and Topolgy Hiding with Diameter Agent.

·   Install DSR in production environment.

 

Mobily Audio/Video conferencing solution deployment (2010 – 2011)

Description: - Mobily is the fastest growing mobile communications and technology provider in the Kingdom of Saudi Arabia. Movius provided integrated video conferencing solution for wireless and enterprise users.  A wireless 3G user, video hardphone user, video capable softphone user and IE based web user can all join in one meeting. Huawei video gateways were used for wireless and video hardphone users. Collaboration features were also offered and so collaboration supplication servers were also installed. IN Billing was done using Diameter protocol and SMS and SMTP was used for all notifications.

Responsibilities are as follows:-

·   Provide integration documentation, call-flow documentation, firewall port filter specifics, install guides and test cases.

·   Install application servers and all other network components of Movius.

·   Fine tuning applications to make video conferencing work.

·   Integrate with Huawei Video gateway.

·   Integrate with Brocade web load balancers.

·   Integrate with SMSC gateway.

·   Integrate with IN Billing server.

 

STC Saudi Arabia NSN HiQ integration with SSO (June 2011 – September 2011)

Description: - Headquartered in Riyadh, Saudi Arabia, Saudi Telecom Company (STC) is the largest telecommunications company by market capitalization, total revenue and number of employees in the Arab State region. On hosted solution platform STC was looking at Movius to Integrate with NSN HiQ for managed services visa SSO (Single Sign On). HiQ was using Movius API’s to gain access via SSO and customize Movius end user interface. Both Unified Messaging and Conferencing solutions were integrated with HiQ along with Collaboration and content rich features.

Responsibilities are as follows:-

·   Articulate integration plan.

·   Coordinate with STC engineering in installing and get acquitted with Movius SDK and API calls.

·   Upgrade systems to latest version of software.

·   Integrate with HiQ SSO portal over HTTPS.

 

ComHem complete hardware and software upgrade along with relocation (August 2009 – May 2010)

Description: - About 40 percent of Swedish households are connected to Com Hem's network and have access to the widest range of TV, HDTV and On Demand services. Com Hem also provides affordable and quality services for high-speed broadband and telephony. To cope with expanding telephony business needs ComHem had to expand existing voicemail and Unified messaging platform. They planned to move all telephony systems to a secure location. As per required they wanted to upgrade hardware, upgrade software, change IP addressing plan, relocate servers to new secured data centre.

Responsibilities are as follows:-

·   Document technical aspects of overall project with each step defining maintenance hours and service outage hours.

·   Install new hardware afresh and install application in upgrade mode.

·   Renumber IP addressing based on new IP plan.

·   Perform complete testing on new cluster.

·   Decommission old equipment and close project.

 

CBeyond disaster recovery model (Jan 2007 – October 2007)

Description: - In USA CBeyond is one of the biggest hosted solution companies for Unified Messaging in enterprise market. They planned their entire network in disaster recovery model with two core networks in Atlanta & Dallas. Application servers were configured to talk to two networks using CCPU uplink. MS was configured using card level redundancy. NetApps were made redundant using VLAN tagging.

Responsibilities are as follows:-

·   Write the complete procedures for each of the activity.

·   Re-install all application servers as in IPU there is no easy way to relocate servers.

·   Add player node to cluster.

·   Install uplink on all application servers.

·   Configure MS SCC cards on two different networks.

·   Configure VLAN tagging on NetApps

 

KPN custom TUI (Feb 2005 – March 2007)

Description: - KPN (Royal Dutch Telecom) demanded for change in legacy TUI implementation. I was responsible for the project from early stage from support. KPN has requesting huge change in customization of complete TUI menu structure and call flow.

Responsibilities are as follows:-

·   Get customer requirements and design TUI menu structure.

·   Take requirements to engineering by following internal professional services channel.

·   Get release dates from engineering and communicate to customer.

·   Request for allocation of service slots to get the new version of custom patch installed on lab.

·   Test the new patch and get the new defects. This process continued for long time back and forth.

·   Finally getting all issues resolved and customer signoff.

 

KPN subscriber migration (July 2006 – May 2007)

Description: - While customer base at KPN was increasing very fast, managing 500K subscriber in two sites was becoming difficult in terms of load for both Unified Messaging application and HiQ. To over come this, another site was proposed at Amsterdam and 150K of original Amsterdam site was planned to migrate to new site in Amsterdam. As Siemens moves DN in HiQ, UM subscriber migration also has to happen at same time. Challenges in hand were to minimize the downtime and at the same time all 150K has to be migrated along with their settings, messages and address books. 

Responsibilities are as follows:-

·   New migration tools was developed for this type of migration where working subscribers can be migrated from one system to another system with all settings, messages and address books intact.

·   Get the 500k subs data from customer and test newly developed tool in lab and note timing of each step.

·   Submit tool with expected timelines from local lab.

·   Then for full proof convince customer also to test the tool in customer lab.

·   Final migration in one night.

 

Casema MS geo redundancy model (April 2007 – Dec 2008)

Description: - Casema has requested for a plan on Unified Messaging application in which they need Media Server in geographical redundant and load sharing mode. To make this functioned we recommended migration of NAS (Network Attached Storage) from Procom to NetApp. With 4 nodes cluster of application servers at Den Haag and one MS and NetApp in Den Haag and another MS along with another NetApp in DeMeern was installed. Both NetApp was configured for snap mirroring. At a time one NetApp is active and other one in snap mirrored and standby mode.

Responsibilities are as follows:-

·   Configure and deploy new NetApp in Den Haag.

·   Migrate NAS from Procom to NetApp was the first step.

·   Get the right IP plan for new MS and NetApp in DeMeern and check latency, because the MS at DeMeern was also talking to NetApp at Den Haag.

·   Install and configure new MS and NetApp in DeMeern

·   Configure 4 node application clusters to talk to both MS.

·   Configure snap mirroring for both NetApp of Den Haag and DeMeern.

·   Test failover for proof of concept and get customer signoff.

 

IMAP integration with external mail server at ComHem (March 2006 – May 2006)

Description: - IMAP integration with customer mail server at ComHem was completely under my supervision. ComHem cable operator in Sweden has Unified Messaging solution from IP Unity and as package they also provide free mail ID to each subscriber from another mail server. Later they bought IMAP integration from IP Unity and the plan was to add profile from IP Unity mail server to external mail server and the communication will happen over IMAP. Each subscriber of ComHem will get one email ID and that will contain two profiles one will be regular mail profile and another will be voice mail profile.

Responsibilities are as follows:-

·   Develop a plan with diagrams of data flow and procedural documentation.

·   Work with co-location firewall management to open appropriate ports.

·   Provide bulk provisioning awk tool to enable IMAP for existing mailbox.

·   Provide custom API provisioning samples for new subscribers.

·   Work with external mail server administrator to add voice mail profiles.

 

Transit Route for Middle East (Assisted in this Project July 2004 – Sept 2004)

Description: - Transit route connecting from customer premises (NYC) to last mile (Middle East) was executed under my supervision, designed to terminate transit traffic for complete Middle East. 2 E1 IPLC (Flag) on HDLC technology were used for IP. Signaling design was ISDN--H.323—SS7. 16 E1’s was incorporated and was successfully deployed.

Responsibilities are as follows:-

·   To coordinate with service providers (FLAG) and Telecom company.

·   To coordinate with complete Team of technicians involved in execution.

·   Designing of project in diagram form and in process of escalation with responsibilities keeping in mind the outcome of technical limitations.

·   Reporting and updating to managements involved in process.

 

Pre-Paid, Post-Paid, Origination & Termination for Iraq based company

Description: - Designing of complete voice communication over IP for Iraq based client was a good experience to work with log based billing. Both way calling from wholesale VOIP carriers & Telco companies to end user and corporate Pre-paid and Post-paid customers was build.

Responsibilities are as follows: -

·   Designing feasible setup for both way traffic on VSAT based IP link in more then 8 cities.

·   To coordinate with Teleport for all links (made all links up with good EB/no with single VSAT engineer).

·   To coordinate and monitor availability of hot destination with A-Z destination calling provider.

·   Designing of project in diagram form and in process of escalation with responsibilities keeping in mind the outcome of technical limitations.

·   Reporting and updating to managements involved in process.

 

Accra Termination with IPLC (Assisted in the Project July 2004 – March 2005)

Description: - Designing termination route to Accra from customer premises (NYC) to last mile (Accra) on E1 IPLC from BTNAccess was successfully laid for 16 E1 Termination. Signaling design was ISDN--H.323—R2.

Responsibilities are as follows: -

·   Responsible to handle complete project from initial installation to till dated maintenance.

·   To coordinate with service providers (BTNAccess) and Telecom company.

·   To coordinate with complete Team of technicians involved in execution.

·   Designing of project in diagram form and in process of escalation with responsibilities keeping in mind the outcome of technical limitations.

·   Reporting and updating to managements involved in process.

 

Teles iGate GSM gateway Installations (Assisted in this Project November 2004)

Description: - Training, Designing, Installation & Consultancy services were provided to SOFTEL (Dubai), Icall (India) & AlIraqGate (Iraq). Trained 5 engineers on Teles GSM systems.

Responsibilities are as follows: -

·   Complete training from basic assembling to high end configuration.

·   Responsible to work sometimes with lay man to make network up and running.