Requirements
Perform advanced troubleshooting for SIP call failures, PRI/E1 link issues, and SBC problems. Resolve P1/P2 incidents within MTTR targets and conduct root cause analysis. Requires strong knowledge of SIP, RTP, ISDN PRI, VoIP codecs, TCP/IP, QoS, and experience with NMS/EMS tools, packet capture tools, CLI troubleshooting, and ticketing systems.
Description
Job Title – Voice Network L2 Engineer / VoIP Specialist Company – TCS (MEA)Location – Doha, QatarJob type – Full timeAbout Us:Tata Consultancy Services (TCS) is an IT services, consulting and business solutions organization that has been partnering with many of the world's largest businesses in their transformation journeys for over 50 years. TCS offers a consulting-led, cognitive powered, integrated portfolio of business, technology and engineering services and solutions. This is delivered through its unique Location Independent Agile™ delivery model, recognized as a benchmark of excellence in software development.A part of the Tata group, India's largest multinational business group, TCS has over 616,171 of the world's best-trained consultants with 157 nationalities in 53 countries. For more information, visit www.tcs.com and follow TCS news at @TCS_News.Job Description:Key Responsibilities1. Advanced Troubleshooting & Fault IsolationPerform deep-dive troubleshooting for: SIP call failures, call drops, one-way/no audio issuesPRI/E1 link issues (LOS, LOF, slips, framing errors)SBC (Session Border Controller) issuesSoftswitch / IMS-related signaling failuresAnalyze: SIP call flows (INVITE, BYE, REGISTER, etc.)RTP media path issues (latency, jitter, packet loss)Identify problem domain: Core voice networkCustomer CPE / IP-PBXCarrier interconnectAccess/backhaul network2. Incident Resolution & Service RestorationOwn and resolve P1/P2 incidents escalated by L1Drive restoration within defined MTTR targetsPerform: Call flow tracing and log analysisSIP ladder analysis and debuggingPRI circuit validation and diagnosticsLead troubleshooting during major voice outages3. Protocol & Signaling ExpertiseStrong working knowledge of: SIP, RTP, RTCPISDN PRI (Q.931 signaling)VoIP codecs (G.711, G.729, etc.)Analyze: Registration issuesCall routing misconfigurationsCodec mismatch / negotiation issues4. Root Cause Analysis (RCA)Perform detailed RCA for: Call drops / failure spikesRecurring voice congestionIntermittent quality degradationIdentify root causes such as: Network congestion / jitterMisconfigurationRouting / dial plan issuesISP/carrier-related faultsProvide Corrective & Preventive Actions (CAPA)5. Change & Implementation SupportValidate and support: Voice routing changesSIP trunk configuration updatesPRI migrations / provisioningSoftswitch / SBC upgradesPerform impact analysis, pre-checks, post-validation, and rollback planning6. Vendor & Carrier CoordinationCoordinate with: OEMs (Cisco, Avaya, Ribbon, Audiocodes, etc.)SIP/PRI carriers and service providersHandle TAC/vendor escalationsTrack resolution and ensure timely closure7. Performance & Quality ManagementMonitor and analyze: Call success rate (ASR, ACD)Call quality KPIsPacket loss, jitter, latencyIdentify and resolve chronic voice quality issuesSuggest optimization: QoS tuningBandwidth optimizationRouting improvements8. L1 Support & Technical GovernanceProvide technical guidance to L1 teamValidate L1 troubleshooting and escalationsEnhance: SOPsKnowledge base articlesTroubleshooting frameworks9. Major Incident ManagementLead bridge calls for critical outagesDrive coordination across: Network teamsCarriersEnterprise customersEnsure: Timely updatesImpact assessmentQuick restorationRequired Technical SkillsCore Voice ExpertiseStrong knowledge of: VoIP / SIP / RTP protocolsPRI / ISDN signalingIP Telephony & Call ControlIMS / Softswitch architectureNetworking KnowledgeTCP/IP, subnetting, routing basicsUnderstanding of: QoS (voice prioritization)MPLS/Internet transport impact on voiceTools & PlatformsExperience with: NMS/EMS toolsPacket capture tools (Wireshark preferred)CLI-based troubleshootingTicketing tools (ServiceNow/Remedy),Application Deadline: 20-Sep-2026Privacy Note:https://www.tcs.com/connect-with-tcs/privacy-policy