Abdullah Al MonsurElectronics & Telecomunication Engineering North South University**

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Company Overview Assigned Tasks Achievements

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Company Overview**

Bangla Phone Limited (BPL) is a licensed telecommunications company operating in the country since 2004.7000 kilometers long nationwide fiber optic transmission networks in Bangladesh.Directly linked with the submarine cable landing station in Cox's bazaar.**

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Services provided by BPL :1. Data connectivityE1STM-1Ethernet2. Internet service3. International Internet Gateway (IIG)

The theme of Bangla Phone is Connect Anytime Anywhere.

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Transmitter: Optical MultiplexerReceiver: Optical MultiplexerMedium: Optical Fiber

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Topology : Ring

Protocol : SDH (Synchronous Digital Hierarchy)Network Protection : SNCP (Sub-network connection protection)

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CompanyOptical Network (km)Bangla Phone (BPL)7000Summit Communications Limited (SCL)13,200Metronet5400Fiber@Home7788

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Test Faulty MUX (Multiplexer) Operation & Maintenance At Switching Room New Circuit Implementation

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Software : Ez viewer Hardware : A faulty & healthy MUXStep's:Check AC/DC power sourceSet a new IP and ping to confirmShort the ETH port and NM port of the faulty MUXSet up a link between two MUXCheck OLOS from both the ends Configure the services : ETH services (2G)E1 services (3G)

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Sync & check the generated alarmsSend a byte from healthy MUX to faulty MUX

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Maintenance:24 hour network monitoringCustomer complainOperation:Software : Optimex imanager T2000 for monitorongTo solve customer problem Ez Client **

Problems: Fiber cutLink downWrong configurationPower down of MUX .

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**Reason:Fiber cuts come from construction companies and excavators due to their construction work.Trucks and other vehicle-related damages fiber cable.Natural Disasters (High winds, storms.)Maintenance:Maintenance team go to site to reconnect

**Reason:Put wrong IP in MUX.Gateway not selected.Service configuration problem

Maintenance: Using Ez client to reconfigure the MUX

Power Down:This problem occur due to switching off the MUXFaulty MUX:Producing critical alarm**

**Pass mismatch:If wrongGateway orservice is notdropped in theMUX.

Equipment requires- 1.LMFIT MUX (Depend on customer demand).2.OLT, ETH, DC Power, AC Power card3. Circuit Breaker4.Power Cable5.Optical Fiber Cable6.Grounding Cable Etc.Process-The circuit is develop physically by OSP teamDesigned in the Ez Client softwareMUXS are set up in the customer endMUX configurationPinging MUX from switching room MUX**

**Achievement

Know the structure of optical networkHow to maintain optical networkDifferent types of protocolLearn to use Ez Viewer,Ez Client,Optimex imanager software to make network & maintain the network.

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