Tcom - Network Support Senior Specialist

NTT
Bengaluru
Workplace: OnsiteFull timeFunction: Solutions Engineering & Sales EngineeringEducation: bachelorsSkills: []

Own advanced telecom/UC administration for Cisco-based environments, including CUCM clusters, dial plan design, SIP trunking, and SRST survivability. Tackle complex L2 escalations with incident resolution and RCA, ensuring UC redundancy, failover, and disaster recovery. Coordinate UC security and E911/regulatory compliance, lead upgrades and migrations, and produce HLD/LLD documentation and SOPs. Serve as the primary liaison with Cisco TAC and carrier vendors for L3 escalations.

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FursaFursa
NTT
NTT
3 weeks ago

Tcom - Network Support Senior Specialist

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Source: Company careers pageValidated by: Fursa AI
Last checked: 15 hours agoStatus: Live
Reposted: first listed 15 hours ago

Job Summary

Own advanced telecom/UC administration for Cisco-based environments, including CUCM clusters, dial plan design, SIP trunking, and SRST survivability. Tackle complex L2 escalations with incident resolution and RCA, ensuring UC redundancy, failover, and disaster recovery. Coordinate UC security and E911/regulatory compliance, lead upgrades and migrations, and produce HLD/LLD documentation and SOPs. Serve as the primary liaison with Cisco TAC and carrier vendors for L3 escalations.
Location: Bengaluru
Workplace: Onsite
Employment Type: Full time
Job Function: Solutions Engineering & Sales Engineering
Seniority: Mid level

Key Responsibilities

  • •Perform advanced UC administration and operations such as call routing, numbering-plan optimization, feature configuration, and complex incident/problem ownership with RCA and permanent fixes.
  • •Support UC integrations and interoperability across SBCs, CUBE, PSTN providers, and contact center solutions (UCCE), ensuring compatibility across hybrid UC environments.
  • •Design and implement Cisco UC architectures including CUCM clusters, SRST sites, SIP trunking strategies, and dial plan configurations; produce HLD/LLD documentation for deployments and migrations.
  • •Enforce UC security measures, participate in E911 configuration, and support regulatory compliance audits.
  • •Plan and execute UC version upgrades, product migrations, and infrastructure refresh projects, while coordinating with Cisco TAC and carrier vendors for L3 escalations and reviews.

Key Requirements

  • •Deep hands-on experience administering Cisco Unified Communications Manager (CUCM), including design, deployment, and cluster management.
  • •Expertise administering Cisco Unity Connection (voicemail) and Cisco Emergency Responder (E911).
  • •Proven dial plan design skills (E.164 numbering, global route patterns, SIP normalization).
  • •Strong experience with SIP trunk management and SRST site-survivability configuration.
  • •Hands-on knowledge of CUBE (Cisco Unified Border Element) and voice gateway deployments (TDM, PRI, SIP), plus VoIP protocol knowledge (SIP, RTP, SRTP, MGCP, H.323).
Experience:TelecommunicationsVoIPUC&CEnterprise IT
Education:Bachelor's in IT or Telecommunications
Certifications:Cisco CCNP CollaborationCisco CCIE CollaborationITIL v4 Foundation
Tech Stack:Cisco Unified Communications Manager (CUCM)Cisco Unity ConnectionCisco Emergency Responder (E911)CUCM clustersSRSTSIP trunkingDial planE.164SIPRTPSRTPMGCPH.323Cisco Unified Border Element (CUBE)Voice gatewaysWebexMicrosoft Teams voicePythonPowerShellAnsible

Company Brief

NTT
Dimension Data, operating under NTT Ltd, provides managed IT services, cloud and data center solutions, networking, cybersecurity, and digital transformation services to enterprise customers worldwide.
Industry: Professional Services
Company Size: Enterprise (1,001+ employees)
Revenue: USD 1B+
Growth: Established Company
Valuation: Public Company (Market Cap in USD)
Headquarters: London, United Kingdom
Founded: 1983
WebsiteLinkedIn