SUNIT KUMAR BHATTACHARYA

856-***-****

ac29kv@r.postjobfree.com

Career Objective:

Seeking the position of a Telecom lead wherein my extensive knowledge and experience in the field of telecommunication can be utilized towards the growth and development of the organization.

Experience Summary:

Organization : Infosys Technologies Ltd,

Duration : March 2013 to till date

Designation : Senior Systems Engineer

Place of work : United States (~ 1.5years) and India (~3years)

Clients : Comcast Cable Inc

Technology and Core Competencies:

4.5 years’ experience in the telecom domain – VOIP Infrastructure, Architecture, development and Testing.

Excellent knowledge on VoIP and related protocols like SIP,IMS, SCCP,SCTP, RTP, MGCP (Network Call Signaling), MEGACO (H.248), ENUM, DNS, DHCP, RADIUS, DIAMETER, SNMP

Strong base on legacy SS7 network - ISUP, SIGTRAN, TCAP

Worked on the virtualization of

Worked extensively on the IMS (IP Multimedia Subsystem) platform and excellent knowledge of IMS 3GPP standards

Excellent vendor management skills. Worked with multiple VoIP vendors like GL, Huawei, Alcatel-Lucent, Ericsson, Empirix, NOKIA, CISCO etc.

3 years’ experience in VoIP Network testing and implementation - Voice SIP Infrastructure, IMS (Residential and Business Features), SS7 Protocol Stack

Worked extensively on MGC (Media Gateway Controller), MGW (Media gateway), BTS (Billing & Traffic Server) & COM (Centralized operation Manager) as part of MGCF; a gateway for SIP to ISUP conversion and vice versa

Worked extensively on Voicemail and IVR platforms.

Worked extensively on VoIP testing tools like SPECTRA2, SIPp etc.

Have worked on the tools like HP Quality Center, JIRA, Empirix Hammer, IRIS, JIRA, WireShark, Sevone and various other telecom tools.

Strong Knowledge on ENUM, IRDB database concepts, CNAM, LNP, Toll-free Concepts

Worked on Automating various voice related features for both residential and commercial IMS through Hammer Visual basic (used in Hammer) and Java (used in GL)

Strong base on IP networking basics (IP switching/routing, VPN, Firewalls etc.)

Good knowledge on databases like Oracle, SQL etc.

Sound knowledge of various telecommunications areas like Call Handling, Routing concepts, Call Processing, Various Telecom Services like E911, Call forwarding services, Call Return, Automatic Recall, Three-way calling, speed dial services, Call-waiting, Local Number Portability, Number Redirection Services, Call Distribution, Call Parking.

Strong knowledge on Charging functions and Billing Servers (DIAMETER and CDRs)

Strong problem solving, planning, communication and customer service skills.

Possess excellent programming knowledge in Java, Python, Linux, JavaScript, and VB script.

Educational Summary:

Achieved Distinction in Bachelor of Technology degree in Electronics and Telecommunication from Heritage Institute of Technology, Kolkata, India in the year 2012

List of Projects worked on:

1.Client : Comcast Cable Inc., Mount Laurel New Jersey, US (March 2013 – till date)

Role

Senior Systems Engineer, Project Lead

Projects

MGC (Media gateway Controller), MGW, BTS,COM; all the MGCF components; legacy SS7 networks

-Virtual Media Gateway Rehoming

-CISCO ITP to NOKIA STP migration

-SIP Infrastructure – Design and Architecture

-IP Multimedia Subsystem Design for Comcast

-Wholesale Voice SIP/VoIP network Design and Architecture

-CALEA (Lawful Enforcement) Design

-VoIP Least Cost Routing Design

LNP & ENUM implementation on MGC

Responsibilities

-MGCF is a Gateway that works as a SIP to ISUP converter and vice versa

-Call Routing Design and Architecture of SIP Routing and Wholesale Voice Infrastructure involving Session Border Controllers, SIP Proxies and VoIP Routing Engines

Standard patch upgrade & certification on all NOKIA/ALU components (MGC,MGW,BTS,COM)

-IP Multimedia Subsystem Routing Design

Feature request submission and design/implementation review

-Coordination with different teams like QA, Operations, Deployment

-Vendor Management

Production and lab issue debugging

Routing implementation of both inbound and outbound off net calls

911 call flow and routing implementation and validation

Technology Stack :- Java,Python,Node.js, bootsrap, linux, VB

ProtocolsUsed : IMS,SIP,SS7,Diameter,SCCP,SCTP,Radius,DHCP,SNMP,MEGACO,ENUM,SIGTRAN,TCAP

2.Client : Comcast Cable Inc (March 2013 – Jan 2016)

Role

Senior Systems Engineer

Projects

XARC Development

Responsibilities

i) Developing Automation Testing Framework using bootstrap, Javascript

ii)Automating Voice test cases and integrating with the framework with Python, Shell script & VB script

iii)Developing script to validate voice features in Hammer (traffic generator) through Hammer Visual Basic

Awards and Recognitions

-Won Several awards within the company (STAR Awards)

-Client recognition for one of the most valuable players in the organization

Employment Information:

Employment Status : Full Time

Valid H1-B till : 08/05/2018

Reference:

Will be pleased to provide upon request.

The above furnished details are authentic.

Place : Mount Laurel, NJ

Date : 11/9/2017 (SUNIT KUMAR BHATTACHARYA)

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