Farhan Hossain

Experience

• 

  Sigma Telecom Ltd.

  Jan 2013 - Dec 2015

  Core Network Engineer, Team Lead

  • Configuration, Operations & Maintenance of SIP & SS7 inter-connection between international carriers and ICX (Interconnection Exchange) operators.•Configuration of Session Border Controller (SBC) for connectivity with international carriers.•Configuration of TDM connectivity with ICX operators in SOFTX and MGW (Media Gateway).•Routing international inbound and outbound traffic based on percentage, priority of different Ingress and Egress Carriers.•Ensure smooth SDH path connectivity with different ICX operators.•Calling plan binding, applying translation for different calling plan, both national and international in SOFTX.•Troubleshoot the problem for international carriers and ANS,ICX operators on SIP/ISUP.•Based on different QoS parameters - ASR,ACD,Latency,Jitter, assure voice quality according to SLA with carriers.•Correlate with other departments-billing,carrier relations and synchronize accordingly.•Preventive maintenance and perform 2nd level analysis and provide feedback to management and related department. Show less

• 

  Sigma Telecom Ltd

  Jan 2016 - Jun 2022

  Manager, Operations & Engineering

  • Managerial:• Maintain SLA (Service level agreement) with Tier1 and Tier2 International Voice Carrier.• Keep liaison with BTRC (Bangladesh Telecommunication Regulatory Commission) officials to the purpose of revenue sharing and regulatory issues if any.• Communication with IOF (IGW operator’s forum) regarding revenue sharing, billing purpose, network planning as required.• Communication with IOS (IGW operations switch)/ICX (Interconnection exchange) operators regarding any complain from Client side, network performance assurance, redundancy planning.• Dispute management with Tier1 and Tier2 Carrier, IOS operator. Also, to synchronize data with tech, sales and billing team to ensure minimum dispute with clients also vendors.• Supervise day to day work flow of Network Operations Center(NOC).• Technical:• Configuration, Operation and Maintenance of SS7 & SIP between different ICX (Interconnection Exchange)/ IOS (IGW Operators Switch) and International Carriers. • Provide high quality voice to maintain SLA with Carriers based on different QoS parameters ASR, ACD, Latency, Jitter for IP call. • Configure TDM connectivity with ICX and international carrier in SOFTX. Applying translation for different calling plan both national and international in SOFTX. • Configuration of Session Border Controller (SBC) for End point, Ingress/Egress IP define, Call test to different ICX and Carrier, Priority based and percentage based routing for Carriers. • Configure NE40 router with IPLC Circuits, also configure BGP and PBR, ACL based routing policies to define different routing scenes as per requirement.• Configuration and maintenance of Billings Servers, NTP Servers, shell scripting in Linux Platform.• Supervise Different IP call troubleshooting and performance analysis.• Ensure smooth SDH transmission path connectivity with different IOS/ICX operators. Show less