Customer Support Maintenance
Resume:
Gurcharan Singh
::*************@*****.***
Summary
Efficient and responsible professional having experience of 6.5 years in troubleshooting of CS Core/VOLTE. Proactive in solution designing, planning, implementation and customer support.
Skills Summary
Strong knowledge on testing wireless network technologies such as LTE/Volte, IMS, SIP, DIA, GTP for messages transmission.
Knowledge of 3G/LET/Volte network, routing and all type of signaling and call flow concept of VOLTE/VOWIFI. Experience in troubleshooting of Diameter, TCP & UDP Protocol related issues by Analysing Interface & User traces.
Ability to work independently, under pressure and challenging environment with cooperation and team spirit.
Act as escalation point towards various network major vendors like Nokia, Huawei, Ericsson to troubleshooting, expedite, and resolve network issues and business impacting problems.
Knowledge of 2G/3G/EPC/5G network, routing and all type of signalling and call flow concept of EPC/VOLTE/VOWIFI
Experience in troubleshooting and Trace analysis of all IMS/EPC call flow scenarios.
Experience in troubleshooting of Diameter, GTP (GTPv1 and GTPv2), TCP & UDP Protocol related issues by Analysing Interface & User traces.
Project Management handling activities related to upgrades, expansion, feature extension, patch loading, configuration changes etc.
Review suitable Method of Procedure (MOP) documents for changes made on the CS/IMS nodes and help in preparation for the same and implement those MOPs.
Tools and Technical Skills
CBIS, CBAM, CBND. NTAS (Virtual) and CSCF – CFX 5000 (Virtual and bare metal)
SBC, PCRF, SGW, PGW, MRF, IMSGW.
Testing Tools – Wireshark, Putty, Secure CRT
Work Experience
Contract -- Freedom Mobile Limited (Toronto, ON)
Role : Sr. Engineer.
Duration : Nov 2021 – Present
Responsibilities:
In depth knowledge of IMS Architecture, Troubleshooting, Deployment & third part integration, skill of nodes P-CSCF, S-CSCF, I-CSCF, TAS and SBC, HSS, HLR.
Good Knowledge of IMS/EPC architecture with E2E call flows.
Proficient in handling Network Issue of Fault and Configuration management of Multivendor EPC/IMS Nodes (Nokia) CUPS CMG/SAEGW, cMM, DDE, PCRF, TAS, SBC, CFX & ePDG.
Performing O&M FM/CM task for complete IMS/EPC network elements.
LTE/VOLTE test case designing, reviewing test plans/test cases, test execution, validating and documenting.
E2E SIP Connectivity established with STIR & Shaken (mobileum server) and Metaswitch SBC, in order to avoid Spam calls.
Implemented E2E connectivity for NG911 with other operators like Bell and Telus.
Activity participating in all testing procedure in order to compliance STIR & Shaken and NG911 project.
Using lab to reproduce/understand production issues/problems to collect additional logs for vendor investigations and find/validate any suitable workaround or corrections.
Participate, as Core Network SME, in ad-hoc Special Projects with Wireless Technology and Engineering teams for network integrations and launch of new services.
Verify the documents (HLD) submitted by vendor.
Participation in inter domain technical issue assessment and fault analysis and correction for various cloud EPC/IMS network elements.
Collecting Wireshark logs, Analysis and troubleshooting for any error message/ code.
Root Cause Analysis for the defects raised in each release and designing new test scenarios for scenario coverage.
Working closely with next level support teams in order to provide timely resolution of faults.
Review suitable Method of Procedure (MOP) documents for changes made on the CS/IMS/EPC nodes and help in preparation for the same and implement those MOPs.
Implementation the changes required in nodes or network in Maintenance Window in which sometimes traffic migration also includes.
Last Employer : Nokia India Pvt Ltd.
Role : Sr. Engineer. Location : Gurgaon, INDIA
Duration : Jan 2014 to Apr - 2019
Responsibilities:
Switch Operations for FCAPS (Fault, Configuration, Administration, Performance and Security) management.
Performing routine, preventive and corrective maintenance on Network Elements including MGW, MSS and HLR.
Maintenance Troubleshooting of Critical, Major and Minor Alarms
Established SS7 connectivity of switch, IN and STP.
BSC/POI Creation, BSC Re-homing and subsystem management over MSC.
Emergency/Case handling with NSN with proper coordination and requirement,
Traffic analysis, KPI maintenance (ASR, SCR, LUSR, PSR), CDR Management, providing HLR Dump.
Working closely with next level support teams in order to provide timely resolution of faults.
Implementation the changes required in nodes or network in Maintenance Window in which sometimes traffic migration also includes.
Collecting Wireshark logs, Analysis and troubleshooting for any error message/ code.
Root Cause Analysis for the defects raised in each release and designing new test scenarios for scenario coverage.
Upgrading CS and PS network elements with the help of Nokia.
Routine O&M activities such as carrying preventive maintenance procedures, detecting, analyzing & rectifying any fault of HLR, SGSN, GGSN, MSC, MSS, MGW and GCS.
IREG SPOC for Idea Haryana, roaming (IR24, IR32 & IR35) Testing & supports in new International and National Roaming tie-up launch.
Coordinate with global product support teams and customer to deliver corrective and/ or preventative solutions within the target dates.
Troubleshoot/Analysis issues discovered during IREG testing and raise them to the appropriate team either internally (CS/PS/IN Engineering) or externally (SS7 signaling providers, interconnect carriers and Roaming Partner.
Diagnosing faulty hardware in system through MMI & replacing the same with a new or repaired hardware.
Development of scripts in Linux and C++ to reduce the time and automize some tasks.
Routine O&M activities such as carrying preventive maintenance procedures, detecting, analyzing & rectifying any fault of HLR, MSC, MSS, MGW’s & GCS.
Programming and Tool Language
Wire shark, Tshark, tcpdump.
LINUX- understanding of basic LINUX.
Basic knowledge on SQL and python scripts
Secure CRT, Putty, WINSCP, FTP, Nokia NetAct and Ultra edit.
Educational detail
Bachelor of Technology (Electronics & Instrumentation) from IET Bhaddal Ropar, Punjab
Ontario College Graduate Certificate (Project Management) from Conestoga College, Kitchener, Ontario.
Ontario College Graduate Certificate (Wireless Network Infrastructure) From Conestoga College, Cambridge, Ontario
Professional Synopsis
Demonstrated ability to work independently, as well as collaboratively with onsite team.
Highly self-motivated and self-directed.
Able to prioritize and execute tasks in a fast-paced, high-pressure environment.
Excellent written, oral, and interpersonal communication skills in English.
DECLARATION
I hereby declare that the above-mentioned information is correct to the best of my knowledge.
Gurcharan Singh
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