Vishwas Tiwari

Experience

• 

  Ericsson

  Jul 2011 - Oct 2012

  Engineer first level

  BSS Engineer working for fault surveillance of BCCH CELL LOGICAL incident reported on Alarm list viewer and report it to Incident Manager and circle team in case of critical and emergency outage with proper RCA while taking care of KPI/SLA parameter as per process.Expertise in Network administration ,CCNA certified , worked on unix based command using various tool like secure crt,Winfol and putty.Worked for projects Sprint Nextel, a US 3rd largest service provider company and typically based on CDMA technology and Aircel India a domestic service provider based on GSM technology to produce better network quality and compliance. Show less

• 

  Nokia

  Nov 2012 - May 2013

  Engineer

  To logically configure various BSCs remotely as per customer requirment and perfom various activities such as Bsc diagnose ,Pcu card upgradation ,Bsc rehoming etc by using reflection tool based on unix commond.Working for Bharti Airtel Africa project as a network engineer to produce better services and deliver compliance.

• 

  Ericsson

  May 2013 - Oct 2015

  Software Quality Assurance Engineer

  Project Description:< Ericsson MTAS 13A is an IMS application server for first-line voice and multimedia communication services. Ericsson Multimedia Telephony Application Server (MTAS), our Session Initiation Protocol (SIP) application server for IP telephony and multimedia, meets all necessary large network telephony requirements.< Telephony Application Server (TAS) acts as proxy servers, originating user agents, terminating user agents, orB2BUA.< They have SIP signalling capabilities and are directly involved in the call's signalling flow.< They receive SIP message from the S-CSCF and parse them. Similarly, they generate SIP messages and sendthem to the S-CSCF.< IMS TAS is uniquely equipped to offer service parity and synchronization with the circuit switched (CS) network,enabling a consistent service offering to the user regardless of the access type and service network. Show less

• 

  GS Lab

  Nov 2015 - Jun 2017

  Software Engineer

  Working as QA engineer for SIP/Voip signalling for various feature test scenario

• 

  Mavenir

  Jul 2017 - Feb 2019

  Senior Member Of Technical Staff

  Responsible for testing and deployment of IMS core network element such as SBC, TAS and S-CSCF.ATP testing, Bug reporting, Configuration checks, Customer interaction etc. Supporting in network critical issues, restoration, implementing changes during planned events and preparing root cause.

• 

  Nokia

  Mar 2019 - now

  Senior Solutions Specialist

  Currently working as Solution Architect in Nokia to handle different VoLTE/IMS/VoNR projects.. Suggesting solutions to the customer, dimensioning & providing resources & HW/SW size requirement of the IMS network. . Suggesting new features which can value add to the customer, planning & optimisation within the network. Preparing HLD and LLD document required to the customer. . Experience in cloud, Docker, Kubernetes, 5G, IMS, Openstack etc.. Deploying TAS,BCS,MCS,SMSF,NEF for one of the US client on AWS.. Loading image, creating ECR repository,tagging & Pushing image to the repository server.. Preparing Charts with the help of LLD available, preparing values.yaml, Policy, rolebinding and secrets.. Doing basic troubleshooting during the deployment and Testing.. Done integration with AMF,NRF IMPSMGW, UDM and SMSC for SMSoNAS testing.. Taking logs on worker nodes, analyzing the issue and making changes on config file.. Performing upgrade, applying patch and all the othe other LCM activity.. Good understanding of AWS, docker and google cloud platform.. Nokia L3 5G Core Architect Certified. Show less