REHAN AHMAD

acxykt@r.postjobfree.com, Cell: +1-973-***-****

Address: Shrewsbury Green Drive, Shrewsbury, MA 01545

Professional Summary:

Project Management / Service Delivery Management

Mobile Core ( EPC / IMS Core)

IMS/ EPC / SIP/VoIP/ VoLTE/ LTE / RTP/RTCP/IP / SIGTRAN /UMTS / GSM / SS7 / OSS

Technologies

Interfaces in Core network: Iu-CS, Iu-PS, Mw, Cx etc

UE Registration flow and call flwo in LTE and UMTS

Experience in Telco network Elements: SIP Servers, IMS(P-CSCF,I-CSCF,S-CSCF,TAS), MME,

SBG, BGCF, MGCF, MSC-Server, HLR, MGW, RNC, and BSC, OSS, CALEA

SIP, Air interfaces and protocols

Knowledge of TCP/IP, IPv4, IPv6

Ability to analyse the traces of Wireshark and Iris and analyse the issue

Performance reporting for Voice Core and Packet Core (IMS, MME, eNodeB) nodes related to

capacity, utilization and quality.

Knowledge and understanding of the connectivity and interface towards IN & Billing Network.

Knowledge of the protocols CAP, SIP, Diameter, LDAP and Web Service Protocols.

Virtualization principals, openStack and event flow architecture

SIGTRAN, ISUP, SCTP, IP, OSPF, RTP, Q.931, GSM Protocols, GSM-R protocols

ENIQ Script basic skills and Extract the reports

IT/Telco Skills:

Well versed with MS Office 2003/2007, Business Object, MS Access, IP Networking (CCNA

training)

Database in SQL

Working knowledge of Linux

MS Excel, macros, visual basic

Protocol Testers K14, Iris, Wireshark

Excellent skill on bulk scripting

Unix based servers and applications handling

Virtualization and cloud principles : openstack and eventflow architecture

Python scripts for the automation

Education: B.E. Electronics, MNR Engineering College, India

Visa Status: H1B

Professional Experience:

May15 May16, LTE VoIP Engineer at T-Mobile Inc, Parsippany NJ

Environments: LTE Testing, IMS, MSS, Blade Cluster (BC), MGw, MSC-S, IMS, P-CSCF, I-CSCF, S-CSCF, SBG,

ATCF, TAS, SS7, SIP, VoLTE, EPC, MME, 3GPP, LTE, KPI, Performance, ACME SBC(SBI/SBA), Linux, Modem,

Test, CALEA, Lawful intercept

Role:

Mange the BSS interfaces and coordinate with Billing ( BSS)

Testing support for Mitel IMS and Ericsson voice core network SIP servers. MME, IMS, BGCF, MGCF, TAS

Support for IMS & MME nodes ( Mitel, ACME & Ericsson, Nokia)

LTE testing for the registration and call flow and feature test

Hands on experience on VoIP network elements such as SBG & SBC

Troubleshoot call flows, protocols and interfaces for IMS & EPC, MME

Analyse and troubleshoot the issue with other networks

KPI Analysis of the VoIP, IMS, MME and MSS

Interaction and meeting with internal customer for the issues and planning

Creating test plan scripts VoIP deployment

Fix the equipment faults ( hardware / software/ configuration)

Support for the data centres for the HW issues

Troubleshooting of the network as well as inter operator calls.

Roles of various network elements like MME, IMS, CSCF, TAS, BGCF, MGCF

Creation of Support application by PHP, OSS.

Create the scripts for the automation tests.

Call flow packet analysis using Iris and Wireshark

Apr14-Apr15, friendsLane Indonesia as Telecom Analyst at Tangerang, Indonesia

Environments: IMS, MSS, Blade Cluster (BC), MGw, MSC-S, IMS, P-CSCF, I-CSCF, S-CSCF, SBG, ATCF, TAS,

SS7, SIP, VoLTE, EPC, MME, 3GPP, LTE, KPI, Performance, ACME SBC(SBI/SBA)

Role:

Technical Analysis of the LTE/UMTS/GSM technologies

Preparation of the tutorials

Website Management

Case analysis of the Business

Dec09-Mar14, Ericsson India/Indonesia as Specialist Core Lead

Environments: IMS, MSS, Blade Cluster (BC), MGw, MSC-S, IMS, P-CSCF, I-CSCF, S-CSCF, SBG, ATCF, TAS,

SS7, SIP, VoLTE, EPC, MME, 3GPP, LTE, KPI, Performance, ACME SBC(SBI/SBA), CALEA, Lawful intercept

Role:

Performance reporting of the SIP Servers & Voice Core Nodes (IMS/MSS/BGCF/MGCF/TAS) & MME

Corrective and preventive Maintenance of VoIP / SIP / IMS / MSS/ SBI ACME and Ericsson/ MME

Configuration and troubleshooting of MSS connectivity towards the IN

Troubleshooting of VoIP network.

Troubleshoot the issues by packets tracers like Wireshark and Protocol Testers

The maintenance and troubleshooting of the billing server connectivity.

Troubleshoot the reasons of call failure and Handover

Hardware troubleshooting for CP, APG and other modules

Responsible for all Planned Work activities of IMS/ MSS Network

Ensure Zero NCs or process deviations for IMS / MSS core Network

To direct and guide resources

To Manage and control operational costs

Nov08-Nov09, Airtel, Aircel & Uninor as Consultant Core at (Meerut, UP/North East/ Patna,

Bihar)

Role:

Performance reporting of the SIP Servers & Voice Core Nodes (IMS/MSS/BGCF/MGCF/TAS).

REHAN AHMAD

acxykt@r.postjobfree.com, Cell: +1-973-***-****

Address: Shrewsbury Green Drive, Shrewsbury, MA 01545

Corrective and preventive Maintenance of VoIP / SIP / IMS / MSS

Configuration and troubleshooting of MSS connectivity towards the IN

Troubleshooting of VoIP network.

Troubleshoot the issues by packets tracers like Wireshark and Protocol Testers

Sep08-Oct09, Telecom Vanuatu Limited as Expert at Core Port Vila, Vanuatu

Role:

Setup NOC for enhanced process

Performance reporting of the MSC/IN/VAS

Corrective and preventive Maintenance of MSC/IN/VAS

Configuration and troubleshooting of MSC/IN/VAS

June08-Aug09, Airtel as Consultant Core at Lucknow, Uttar Pradesh, India

Role:

Performance reporting of the SIP Servers & Voice Core Nodes (IMS/MSS/BGCF/MGCF/TAS).

Corrective and preventive Maintenance of VoIP / SIP / IMS / MSS

Configuration and troubleshooting of MSS connectivity towards the IN

Troubleshooting of VoIP network.

Troubleshoot the issues by packets tracers like Wireshark and Protocol Testers

Dec07-Jun08, MTN, Ghana as Core Network Engineer at Accra Ghana

Role:

Troubleshooting of AXE 2G & 3G network including hardware and software faults

Fault management and configuration management of MSC-S / MGw/MSC / BSC

Generated C7 (LSL AND HSL), SIGTRAN and traffic addition to MGw and MSC-S

Connectivity maintenance and troubleshooting towards the IN network.

Modification in the IN triggering table.

Link maintenance from MGw to the IN network.

Developed daily, weekly, and monthly routines which including backing up CDR records, A-log files, APG, &

CP on tapes

Conducted acceptance test of Ericson core nodes and NE expansions

Performed operation & maintenance activities for GSM, 2G & 3G Networks, AXE Nodes MSC, MSC-S,

BSC, SCP, STP, HLR, FNR (APZ21240 / 50, APG40 NT / 2003) MGw & RNC

Upgraded software for ACA loading

A-number analysis and IN Triggering table modification

Aug06-Nov07, Mobily as NOC Engineer at Riyadh, Saudi Arabia

Role:

Handled 24X7 Surveillance for the nodes MSC, MSC-S, GMSC, HLR, FNR, STP& SCP, MGw/ RNC

Worked in Shift in Mobily OMC and imparted training to the local staff

Followed-up and rectified problems related to systems media, Sites & IN / VAS, AIR, CCN

Carried out primarily troubleshooting of the problem in core nodes and BTS sites

Developed strategies for the high load conditions like Ramadan and Hajj

Handled BTS rehoming and carried out A Number analysis/ B Number Analysis/ IMSI Analysis, Pre Analysis,

EOS codes

Oct05-May05, Ericsson, Indonesia as System Engineer MSC/BSC at Jakarta, Indonesia

Role:

Conducted network audit and route analysis and ensured O&M support for AXE810, AXE10, IOG20 and

APG40 (WinNT) based systems

Reviewed and implemented software releases & approved configuration change requests

Provided Level 2 support for regular issues and updated Surveillance Team of developments of referred

alarms

Overloaded control configuration change implementation and developed & reported CSR

Performed call out for the field engineers for in case physical intervention of the faults

Carried out routine preventive maintenance task in the network such as System Backup and clear the alarms

from the systems

Upgraded BTS software

Feb05-May05, Ericsson, Indonesia as System Engineer MSC/BSC at Jakarta, Indonesia

Role:

Conducted network audit and route analysis and ensured O&M support for AXE810, AXE10, IOG20 and

APG40 (WinNT) based systems

Reviewed and implemented software releases & approved configuration change requests

Provided Level 2 support for regular issues and updated Surveillance Team of developments of referred

alarms

May01-Feb05, Saudi Telecom as System Engineer at Jeddah, KSA

Role:

Carried out operation & maintenance of AXE-10/ AXE-810 based Ericsson MSC/BSC for alarms,

faults/abnormal conditions of AXE systems (both MSC/BSC)

Collected traffic data for MSC/BSC, performed statistical analysis, resolved the cause of call drops & low

success rate in rout and cells and coordinated to rectify them

Carried out real time analysis of all network alarms and fault management in AXE

Involved in troubleshooting the exchange faults and replacement of hardware

Handled system backups on optical disk, tested and coordinated the international roaming

Directed system back-up reload verification from OD to IOG 20C/APG40 and system

Coordinated with STC-Transmission (Riyadh and Jeddah) for PCM link, media related problems

Jul00-May01, Koshika Telecom as NSS Engineer as Kanpur, India

Role:

Operation and Maintenance of Alcatel OCB283 switch, VLR, HLR, and OMC

Routing of calls in cost effective manner

Maintenance of PCM links for R2/ SS7 signalling

Performing various tests for purpose of measuring traffic and analysing the reasons of call failure

Created and analysed the hourly, daily and monthly traffic report

Oversaw congestion in PCM links and recommended measures to overcome them

Monitoring and Managing charging data files being transferred to the Billing system

Subscribed administration in HLR and AUC

Ensured regular backups of various NSS entities

REHAN AHMAD

acxykt@r.postjobfree.com, Cell: +1-973-***-****

Address: Shrewsbury Green Drive, Shrewsbury, MA 01545

Co-ordinated for the connectivity with other Cellular/Landline operators

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