Arnab Basu Email & Phone Number

>Leading a team of 7-8 members responsible for the operation and maintenance of DSX International Roaming.>Conducting trace analysis and resolved roaming issues for both incoming and outgoing roamers.> Participating in LTE migration activities (DRA) in response to customer demands.> Monitoring carrier networks using KIBANA and reported any abnormalities.> Addressing customer complaints related to 3G and 4G/LTE services.> Engaging in troubleshooting calls with customers regarding Diameter link down or congestion issues.> Collaborating with international partners and vendors to manage roaming agreements, ensuring compliance with contractual obligations and service level agreements (SLAs).> Providing expert technical support for roaming-related incidents, troubleshooting issues, and coordinating with internal teams to resolve them promptly.

>Managed Operations and Maintenance of Packet Core Nodes for OPTUS Australia.>Troubleshot hardware-software alarms for MME (Ericsson), EPG (Ericsson SSR), and PCRF (Openet).>Conducted trace analysis and resolved roaming issues for both incoming and outgoing roamers.>Executed configuration tasks for MME and EPG upgrades (Offload/Onload) and PCRF plan modifications.>Configured DNS settings, including APN and NAPTR records, and managed GGSN/EPG configurations for APN creation.>Performed daily health checks on network elements (MME/SGSN, EPG/GGSN, DNS, PCRF, DSR) via CLI and GUI to ensure 100% node availability.>Planned and maintained weekly backups of all Packet Core Nodes.

>Managed Operations and Maintenance of Packet Core Nodes for FLOW (Jamaica/Barbados/Antigua/Cayman).>Contributed to KPI reports for GGSN/EPG and MME/SGSN.>Troubleshot hardware-software alarms and FM activities for MME (Ericsson), EPG (Ericsson), and DNS (IPWorks).>Configured MME settings, including IMSI configuration and LAC-RAC definitions.>Executed DNS configuration tasks, such as APN creation, forward zone management, and NAPTR record modifications.>Managed GGSN/EPG configurations, including APN creation and public APN flush.>Performed corrective and preventive maintenance along with daily health checks of network elements (MME/SGSN, EPG/GGSN, DNS).>Addressed all roaming issues for in-roamers and out-roamers.>Planned and maintained weekly backups of all Packet Core Nodes.>Facilitated knowledge-sharing sessions for team competence building.

>Optimized KPIs, including authentication request success rate, IP pool utilization, and CCA/CCR success rates.>Managed PCRF plan modifications, including additions, deletions, and updates in PCRF, SPR, and Rule-GUI.>Conducted daily utilization and health checks of all Packet Core nodes.>Handled customer complaints related to connectivity issues, PCRF profile concerns, and username/password mismatches.>Ensured daily maintenance and monitoring of all PACO nodes.

>Monitored live alarms for RAN, Circuit Core, and Packet Core systems.>Supported multi-vendor equipment, including Ericsson, Huawei, and Nortel.>Created trouble tickets via OneTm/Acut and ensured closure within SLA.>Recognized faults and troubleshot alarms using Winfiol and Citrix.>Send daily Outage and Health Check Reports for all islands.