Job Description

TCS is Hiring for Network Voice Admin(Cisco UCM)

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Mode Of Interview:- Virtual

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Date Of Interview:- 20-08-2026

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location:- Chennai/Delhi

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Notice Period:- Immediate joiner

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Exp:- 4-6yr

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Must Have:-

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CUCM, CUC, IMP, Cube, SIP, Cisco Expressway, Cisco Webex and MS Teams Voice

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JD

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Good understanding and experience working with one or more of the following:

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Cisco Unified Communications

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Manager (CUCM)

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Cisco Unity Connection (CUC)

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Cisco IM & Presence (IM&P;)

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Cisco Expressway

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Cisco CUBE/Voice Gateway

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Cisco Webex/Microsoft Teams Voice

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Recording Servers

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Strong understanding of SIP, RTP, SCCP, VOIP calls and hands-on experience on Cisco IOS CLI.

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Good knowledge of dial plans, call routing and voice gateway concepts.

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Experience troubleshooting voice quality issues, registration failures and SIP-related issues. Experience using Cisco RTMT for monitoring and troubleshooting.

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Familiarity with VMware-based UC deployments.

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Basic understanding of networking concepts including TCP/IP, DNS, DHCP, NTP, VLANs and QoS.

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Knowledge of certificates like PKI, Certificate management, CSR generation, certificate renewal, security concepts and TLS in Cisco Collaboration environments.

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Familiarity with ITIL processes including Incident, Problem and Change Management.

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Good-to-Have

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Ability to work effectively in a 24x7 support workplace

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And collaborate with cross-functional teams. Exposure to service transition projects, especially right after a Greenfield UC deployment.

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Responsibility of / Expectations from the Role

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- Provide operational support for a large-scale Cisco Unified Communications (UC) and Collaboration environment via ticketing tool (Service Now)
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- Monitor and support Cisco Collaboration infrastructure to ensure high availability and service continuity.
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- Troubleshoot and resolve incidents related to voice, video and collaboration technologies within defined SLAs.
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- Support Cisco Unified Communications Manager (CUCM), Cisco Unity Connection (CUC), IM & Presence (IM&P;), Cisco Emergency Responder, Cisco Expressway, CUBE/VG and Cisco Webex.
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- Support Microsoft Teams Voice and hybrid collaboration solutions integrated with Cisco UC.
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- Manage and troubleshoot SIP trunks, dial plans, route patterns, route lists, translation patterns, media resources and call routing.
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- Perform user provisioning, endpoint configuration, phone registration and MACD (Move, Add, Change, Delete) activities.
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- Troubleshoot call failures, one-way audio, registration issues, codec mismatches, media path issues, and SIP signaling problems.
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- Analyze logs, traces, RTMT data and diagnostic information to identify root causes and restore services.
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- Participate in incident management, problem management and change implementation activities.
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- Perform health checks and proactively identify potential issues within the UC infrastructure.
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- Work closely with Network, Security, other vendors and customer teams during incident resolution and planned changes.
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- Participate in knowledge transfer (KT) and service transition activities.
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- Maintain technical documentation, SOPs, operational runbooks and knowledge articles.
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- Participate in on-call support and maintenance activities as required.
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📌 Network Voice Admin(Cisco UCM) (Tamil Nadu)
🏢 Tata Consultancy Services
📍 Tamil Nadu