Senior Specialist

Infinite Computer Solutions; Dadri; On-site; INR 1,400,000 - 2,100,000; Full time

Job summary

Infinite Computer Solutions in India is seeking an experienced T3 Support – IMS/CS Core Expert to drive advanced troubleshooting and end-to-end support for IMS and CS Core network elements. You will handle escalations, analyze traces, and optimize call flows to ensure service continuity.

The role emphasizes resolving high-severity incidents, performing RCA, and supporting legacy CS Core components across the network.

Qualifications

• Bachelor’s degree in a related field.
• 8–10 years of experience in IMS/CS Core support.
• Experience with troubleshooting VoLTE/VoWiFi and core network elements.

Responsibilities

• Provide advanced troubleshooting for IMS and CS Core issues (VoLTE, VoWiFi, MO/MT call failures, SMS failures, Handover failures).
• Analyze call traces (SIP, Diameter, ISUP, MAP, CAP) and perform deep-dive RCA.
• Support high-severity incidents and ensure timely resolution.
• Handle escalations from Tier-1/2 NOC for CS/IMS nodes (MSC/MSC-S, MGW, HLR/HSS, STP, MTAS, CSCF, SBG, ENUM, DRA, IBCF/TrGW).
• Handle SIP registration issues, VoLTE attach failures, IMS bearer issues, and interworking problems.
• Optimize VoLTE/IMS call flows, QoS, and media negotiation.
• Resolve circuit-switched issues (2G/3G call setup, supplementary services, roaming failures).

Skills

IMS Core

VoLTE

VoWiFi

SIP

Diameter

Troubleshooting

CS Core

Network Trace Analysis

Education

Bachelor's Degree

Job description

T3 Support – IMS /CS CORE EXPERT

Role Summary

The L3 IMS/CS Core Expert is responsible for advanced troubleshooting, performance optimization, and end-to-end support of IMS and Circuit Switched (CS) Core network elements. The role involves handling complex issues escalated from L1/L2 teams, ensuring service continuity, and providing expertise for incident, problem, and change management.

With these activities, you will have a great impact on our business:

Key Responsibilities

• Provide advanced troubleshooting for IMS and CS Core issues (VoLTE, VoWiFi, MO/MT call failures, SMS failures, Handover failures).
• Analyze call traces (SIP, Diameter, ISUP, MAP, CAP) and perform deep-dive RCA.
• Support high-severity (P1/P2) incidents and ensure timely resolution.
• Handle escalations from Tier-1/2 NOC for CS/IMS nodes (MSC/MSC-S, MGW, HLR/HSS, STP, MTAS, CSCF, SBG, ENUM, DRA, IBCF/TrGW).
• Handle SIP registration issues, VoLTE attach failures, IMS bearer issues, and interworking problems.
• Optimize VoLTE/IMS call flows, QoS, and media negotiation.

Support Legacy CS Core Elements

MSC, MSC-S, MGW, HLR, STP, VLR

Resolve circuit-switched issues (2G/3G call setup, supplementary services, roaming failures).

Qualifications

Bachelors Degree

Range Of Year Experience-Min Year

8

Range Of Year Experience-Max Year

10