TCS is Hiring for Network Voice Admin(Cisco UCM)

Mode Of Interview:- Virtual

Date Of Interview:- 20-08-2026

location:- Chennai/Delhi

Notice Period:- Immediate joiner

Exp:- 4-6yr

Must Have:-

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

JD

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

Cisco Unified Communications

Manager (CUCM)

Cisco Unity Connection (CUC)

Cisco IM & Presence (IM&P;)

Cisco Expressway

Cisco CUBE/Voice Gateway

Cisco Webex/Microsoft Teams Voice

Recording Servers

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

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

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

Familiarity with VMware-based UC deployments.

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

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

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

Good-to-Have

Ability to work effectively in a 24x7 support environment

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

Responsibility of / Expectations from the Role

- Provide operational support for a large-scale Cisco Unified Communications (UC)



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

📌 Network Voice Admin(Cisco UCM) (Chennai)
🏢 Tata Consultancy Services
📍 Chennai