Training report On Bharat Sanchar Nigam Ltd

ASWINKUMAR.RECE -PRE Final year

Company Profile

Head Office

AN Introduction Of Bsnl TypeCommunication Service ProviderAvailabilityCountrywide except Delhi & MumbaiOwnerThe Government of IndiaFounded19th century, incorporated 2000Websitewww.bsnl.in

Industry Information

Sector Communication

Industry Telecommunications

Financial Highlights

Fiscal Year End: March

Revenue (2009-10): 32,045 Crore (US$7.15 billion)

Employees (2010): 299,840 (March 31, 2009)

Key People Chairman & Managing Director: Rakesh Kumar Upadhyay

BSNL Services Cellular Service Basic Telephone Services Internet 3G Intelligent Network IPTV VVoIP FTTH Leased Lines Helpdesk

Exchange• Equipment which effects

interconnections of telephone is known as switching equipments.

• The switching centre, which houses the terminating & switching equipments is known as telephone exchange.

Types of exchanges:

1. E10B (Electronics 10 Binary)2. OCB (Optical cable B)3. 5ESS (5000, Electronic sub-subscriber)

Typical exchange consist of following sections:

MOBILE SECTION

MDF

TRANSMISSION SECTION

MICROWAVE

POWER STATION

BROAD BAND

COSTUMER CARE

SECTIONS

Mobile section

The Basic Transmission Procedure: 1. BSC: Base Station Controller2. BTS: Base Station TRANSCEIVER3. MSC: Mobile Switching Center4. HLR: Home Location Register5. VLR: Visitor Location Register6. AUC: Authentication Center7. EIR: Equipment Identity Register8. SC: Short Message Center9. OMC: Operation and Maintenance Center

This section has two parts: GSM CDMA

MDF

MDF stands for Main Distribution Frame.

It is divided into two parts :

VDFHDF

Transmission sectionThis section deals when a caller picks up the receiver, gets the dial tone and how the call is made and processed.

Caller D.P. Pillar

MDFExchange

TAX Exchange MDF

PillarD.P.

Receiver

The call is transmitted from telephone to

Power station

The main parts of Power station is:

Batteries

UPS (uninterrupted power supply)

Charging –Discharging unit

Inverter – Converter unit

The Structure of Optical Fiber

Extremely Pure Fused Silica – Very Low Loss for Long Distance Transmission

Core – Higher Refractive IndexCladding – Lower Refractive IndexBuffer Coating: Mechanical Protection

What is Fiber Optics?

Fiber Optics = Fiber + Optics

In Essence: Light Guided in Optical Fiber

A Simple Fiber Optic Communication Link

Laser Coupled Into Fiber

Photodetector

1. Laser2. Optical Fiber3. Photodetector

Fiber Has More Bandwidth Than Copper

Max. Transmission Distance

Copper Fiber

100 Mbit Ethernet 100 meters 40,000 meters

1 Gigbit Ethernet 100 meters 70,000 meters

10 Gigbit Ethernet 100 meters 80,000 meters

Fiber Connector Type

E 2000

FSMA FDDI

MPO BICONICMT- RJLC

STFCSC

Wavelength Division Multiplexing

WDM = Wavelength Division Multiplexer

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