Unnikuttan U
VOIP Network Engineeer
Bengaluru
Summary
VoIP and Unified Communications Specialist with 9 years of experience in deploying,configuring, and supporting enterprise-level Cisco UC solutions, including CUCM, Unity Connection,Jabber,CUBE, and Voice Gateways. Proven expertise in SIP, MGCP, H.323, and PRI technologies, with a strong track record of optimizing call routing, reducing downtime, and leading high-impact UC projects.
Skilled in vendor management, cross-functional collaboration, and delivering seamless telephony services for large-scale deployments (9000+ endpoints).
Overview
11
11
years of professional experience
Work History
Technical Specialist
HCL Tech
09.2023 - Current
- Managing IPT Cluster with 9000+ end points , ensuring 99.9% uptime.
- Implemented SIP trunk optimization, reducing call failures by 25%.
- Coordinated with vendors for PRI and SIP service escalations, ensuring SLA compliance.
- Moving, Adding, and Deleting Extensions.
- Troubleshooting and providing support for Cisco IPT for clients.
- Configuration of user features, such as speed dial, call forwarding, transfer, call park, call pickup, call forward, and Extension mobility.
- Attending various meetings involving planning and management.
- Troubleshooting of IP Phones and Third-party SIP phones.
- Configuring using Bulk Administration Tool (BAT).
- Configuration of soft key template and phone button template.
- Configuration, Monitoring, and Troubleshooting of Voice Interfaces: ISDN E1/T1.
- Troubleshooting of voice gateway protocol.
- Daily-wise health check-up (CUCM, Gateway).
- Providing timely resolution for call failure issues on the PSTN interfaces, such as SIP and PRI.
- Configuration of Extension Mobility.
- Coordinating with Vendor for PRI Related Issues.
- Conducted daily CUCM & Gateway health checks and resolved RTMT alerts proactively.
- Prioritizing and managing many open cases at one time.
Senior VOIP Engineer
ACL Digital
05.2017 - 06.2023
- Designed and implemented dial plans for multi site environments.
- Managed CUCM upgrades and patching with minimal service disruption.
- Delivered Level 2 VOIP Support , resolving escalations from global clients.
- Designed and implemented dial plans for multisite environment.
- Moving,Adding, Deleting of Extensions.
IT Specialist
Vision Plus Security Control Pvt Ltd
11.2014 - 10.2016
- Installing ,configuring and maintaining hardware and software components.
- Troubleshooting technical issues for end users and internal teams.
- Monitoring system performance and uptime, applying updates and managing backups.
- Implementing IT Security measures and ensuring compliance.
- Collaborating with vendors and other departments to align IT Infrastructure with business goals.
Education
Bachelor of Engineering - Computer Science
Anna University
Chennai05.2012
Plus Two -
Higher Secondary Education Board
Kerala05.2008
SSLC -
Board Of Public Examinations
Kerala05.2006
Skills
Cisoc CUCM, Unity Connection, Jabber, CUBE, SRST, SIP Trunking
Call Routing, Dial Plan Desigm, CSS/Partitions,Route Pattern , AAR, CAC
Bulk Administration (BAT) of IP Phones and IP Communicator
User Features such as Speed dial, Call Forwarding, Call Park
Phone Button Template, SoftKey Template
Configuration of Device Pool, Region, Location
Gained solid understanding and knowledge on various call control protocols like MGCP, H323,SIP and SCCP
Configuartion of Cisco IP Phones and third party SIP Phones
Configuring and troubleshooing of PRI (E1 and T1), ISDN, T1/E1 CAS and FX trunks
Configuration of VoIP and POTS dail-peers
Configuration of Voice Gateways (SIP, MGCP, H323)
Managing dial-plan using Route Pattern, Route List, Route Group,Local Route Group, Translation Pattern,CMC, FAC and SLRG
Class of Service and Class of restriction
Integrating Unity Connection with CUCM (SCCP and SIP integration)
Configuring of Media resources such as MOH, Conference Bridge, MTP and Transcoder
Configuring of Extension Mobility and device profiles
Various monitoring tools like RTMT, DNA and various router debug and show commands
Configuring Voicemail for LDAP users
Configuration of CAC and AAR
Configuring and maintaing SNR issues
Configuration and management of SRST and MGCP fallback
Troubleshooting of Call Routing Issues, IP Phone Registration Issues, Extesnion Mobiloty Issues
Provisioning of partitions and Calling Search Spaces(CSS)
Troubleshooting via RTMT,DNA, Debug and Show commands
Basic Terminolgies of UCCE/UCCX
Avaya PBX Support: Managing & troubleshooting
Vendor Coordination& Project Implementation
Declaration
I hereby declare that all the furnished information above is true to the best of my knowledge.
Unnikuttan U
Timeline
Technical Specialist
HCL Tech
09.2023 - Current
Senior VOIP Engineer
ACL Digital
05.2017 - 06.2023
IT Specialist
Vision Plus Security Control Pvt Ltd
11.2014 - 10.2016
Bachelor of Engineering - Computer Science
Anna University
Plus Two -
Higher Secondary Education Board
SSLC -
Board Of Public Examinations
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