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