Abishek Raman

Experience

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  Idea Cellular Ltd

  Aug 2011 - Dec 2013

  NETWORK SERVICES ENGINEER

  • Received Innovation award for Implementing auto flash SMS feature using shell scripting in SMSC, GboIP for 35 BSC’s in Idea Karnataka.• Was responsible for design planning, configuration and maintenance of traffic from GGSN to the Internet which included equipment such as Cisco 7600 routers, switches, Juniper MX960/M10i routers and ZTE routers.• Added redundancy to the traffic destined to the internet and was also responsible for testing and deploying of IPv6 in dual-stack with IPv4 between enterprise network sites and the Internet.• Provided NOC and O&M operations for PS elements like SGSN, GGSN, LIG, Charging Gateway (CG), Infoblox DNS for the packet core Team in the Network Services Department.• Handled SMSC Fault management, SMSC SHORT CODE and VLR GT configurations in UNIX environment.• Solved complex technical problems on live customer GPRS networks• Strong understanding and working knowledge on campus networks including VLAN, Trunks & VTP, layer 2 switching, spanning tree protocol, Inter-VLAN routing. • Strong understanding and working knowledge with GPRS concepts (PDP/attach procedures, APN, GTP, GRX , e2e QoS etc) and interfaces(Gn, Gp , Gi, GboFR , GboIP, Gx, Gy, Gs, Gf, iuPS, iuSS7, SIGTRAN etc ) • Was involved in commissioning of GPRS Lawful Interception implementation (LIG) including testing. Show less

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  NSN - Nokia Solutions and Networks

  Dec 2013 - Jun 2015

  PS CORE Specialist

  • Global Service delivery team member and supported EPC-LTE, 2G and 3G Packet Core nodes.• Accepted Technical Query cases from customer and provided Technical answers and solutions to customers.• Analyzed the number of Open customer defects as a part of software release and raised customized requests and coordinated with the R&D team for bug fixing / SW related issues.• Handled Emergency Incidents and submitted the Root Cause Analysis (RCA) and technical notes to the customers.• Involved in Troubleshooting and Configuration changes for Packet core nodes- Flexi-NG(GGSN and SAE GW), DX-200 & ATCA (SGSN and MME), Flexi-ISN• Involved in troubleshooting under MS by testing and analyzing traces on interfaces- Gb, IU, Gn, Gr, S1-MME, S1-U, S6a, S11, S5 and S8.• Performed Unit testing, System testing, defect analysis and log file analysis, identified and reported faults in a unit or a sub system.• Involved in troubleshooting of issues related to (MM) Mobility Management & (SM) Session Management. Show less

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  University of Pittsburgh

  Jan 2016 - Dec 2016

  Graduate Student Assistant

  • Responding to students’ e-mails about queries regarding admission process.• Perform a variety of administrative tasks including preparation of Power Point presentations, data entry and analysis, web site development, collating marketing materials and presentations.

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  AT&T Labs, Inc.

  Jun 2017 - Jan 2018

  LTE/IMS Service Assurance Engineer

  ● Was responsible for End to End CVoIP Inter-operability testing with various mobile operators.● Performed load testing on IXIA tool for virtual ISBC testing and used IRIS tool for troubleshooting call flow.● Worked on LTE(4G) end-end service verification delivering voice and next generation services from IMS-based platform for both wireline and mobility subscribers.● Worked on Platform testing on Metaswitch ISBC. Configuration management and change management of ViSBC.● Performance testing of IMS Show less

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  T-Mobile

  Feb 2018 - Jun 2022

  Senior Architect, Network Performance and Analytics

  ● Produced and reported Weekly Executive Dashboard to C-suite executives by gathering KPI data and trends for National Planning and Performance Intelligence Team to use in making organizational decisions.● Currently working on 5G SA Core Optimization and VoNR Readiness● Worked with Big Data engineers, domain experts, business stakeholders, and technical partners to develop and launch smart dashboards, reporting tools, and analytics.● Developing and Evolving IMS Core performance for nodes like CSCF, TAS and SBG (ATCF).● Created a KPI Performance framework to support T-Mobile’s unified communication and collaboration (UCC) products like Business Hub Connect.● Analyzing the impact of new major SW release and HW upgrades for the IMS Core System through the Lab Validation and First Office Application Process.● Analyzed network statistics and trends of the IMS core network to determine areas of improvement both for customer experience and network efficiency such as operational improvement, capacity maximization and performance analysis consistency.● Collaboration with cross functional teams to develop the specifications for IMS Core network emphasizing on Network Performance Measurement and Optimization.● Working with equipment vendors to design and develop product feature definitions as per T-Mobile network requirements emphasizing on Network Performance Measurement and Improvement by leveraging the understanding of the system protocols and data flow working of IMS core network.● Coordinating and aligning regional and Tier2 investigation and troubleshooting of network issues, identified through network statistics and KPIs, and using network probes such as Tektronix IRIS and other tools like NetScout (NBA,NG1).● Creating clear documentation on performance guidelines for the IMS core network. Developing and providing technical data for incorporation into internal presentations that can translate technical issues into business impact. Show less

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  Cisco

  Jul 2022 - now

  Senior Product Specialist, Private 5G