OPERATION AND MAINTENANCE OF

OCB EXCHANGE AND ITS

PERIPHERALS

MIDTERM REPORT

SUBMITTED IN PARTIAL FULFILLMENT OF THE REQUIREMENT FOR

Six Weeks Industrial Training

at

BSNL, DASUYA, PUNJAB

(From January 2010 to February 2010)

SUBMITTED BY

AJAY SINGH

ENROLL NO. 01/07

INFORMATION TECHNOLOGY DEPARTMENT

NATIONAL INSTITUTE OF TECHNOLOGY

SRINAGAR,INDIA

Bharat Sanchar Nigam Limited-INTRODUCTION

(known as BSNL, India Communications CorporationLimited) is a state-owned

telecommunication company in India formed in October,2000. It is the oldest and the largest

telecommunication company of India .BSNL is the sixth largest cellular service provider,with

over 60.22 million customers as of MAY 2010 and the largest land line telephone provider

in India. Its headquarters are at Bharat Sanchar Bhawan, Harish Chandra Mathur Lane, Janpath,

New Delhi. It has the status of Mini Ratna, a status assigned to reputed public sector

companies in India. BSNL is India's oldest and largest Communication Service Provider

(CSP). It has footprints throughout India except for the metropolitan cities of Mumbai and New

Delhi which are managed by MTNL. As on March 31,2008 BSNL commanded a customer

base of 31.55 million Wirelines, 4.58 million CDMA-WLL and 54.21 million GSM Mobile

subscribers. BSNL's earnings for theFinancial Year ending March 31, 2009

stood at INR397.15b (US$7.03 billion) with net profit of INR 78.06b(US$ 1.90 billion). BSNL

has an estimated market value of$ 100 Billion. The company is planning an IPO with in 6

months to offload 10% to public in the Rs 300-400 range valuing the company at over $100

billion.

SERVICES:

BSNL provides almost every telecom service in India. Following are the main telecom services

provided byBSNL:

Universal Telecom Services : Fixed wireline services & Wireless Local loop (WLL) using

CDMA Technology called bfone and Tarang respectively. As of December 31, 2007, BSNL has

81% marketshare of fixed lines.

· Cellular Mobile Telephone Services: BSNL is major provider of Cellular Mobile Telephone

services using GSM platform under the brand name BSNL Mobile. As of Sep 30, 2009 BSNL

has 12.45% share of mobile telephony in the country.

· Internet: BSNL provides internet services throughdial-up connection (Sancharnet) asPrepaid,

(NetOne) as Postpaid and ADSL broadband (BSNL Broadband).BSNL has around 50% market

share in broadband inIndia. BSNL has planned aggressive rollout in broadband for current

financial year.

· Intelligent Network (IN): BSNL provides IN services like televoting, toll free calling,

premium calling etc.

· 3G:BSNL offers the '3G' or the'3rd Generation'services which includes facilities like video

callingetc.

· IPTV:BSNL also offers the 'Internet Protocol.Television' facility which enables us to watch

television through internet.

· FTTH:Fibre To The Home facility that offers a higher bandwidth for data transfer .This idea

was proposed on post-December 2009.

SOME INTERESTING FACTS:

1) There are 2 million mobile connections in rural india which is a record showing the

popularity of BSNL in rural india.

2) Bsnl supplies phone lines on lease basis to all other networks such as

reliance,vodaphone,aircel etc

3) More than 50% international calls use BSNL network.

4) It has largest pan India coverage over 11000 towns and 3 lakh villages.

5) It is te India’s no. 1 wireless service provider with more than 50% million customers.

6) It provides incredible speed of 2 Mbps.

7) It is the only mobile service provider which covers entire India which even includes

J&K, North eastern states like aprunachal Pradesh,Mizoram etc.

VISION OF BSNL:

Marketing vision of the BSNL has to be based on overall mission and vision of the organization.

The mission of BSNLis

i. To provide world class State-of-art technology telecom services on demand at affordable

price.

ii. To provide world class telecom infrastructure to develop country'seconomy.

And the vision of BSNL is

i. To become the largest telecom Service Provider inSoutheast Asia.

In dynamic environment anything permanent is “CHANGE”.So we must revise and review so

that focus is never lost.

Strong lives are motivated by dynamic purposes. -

Kenneth Hildebrand..

TELEPHONE EXCHANGE

INTRODUCTION:

The main function of an exchange is to process call from a calling subscriber and make

the connection to the called subscriber. This connection can be direct or via another

exchange. This requires all parts of the exchange to work as a unit to ensure the call is

properly handled.

CALL PROCESSING ARCHITECTURE

The main function of the exchange is to process subscriber calls. The exchange does this

by connecting an incoming line or trunk to another line or trunk.

However call processing involves much more than simply connecting subscribers. In

order to process the calls the exchange must perform four basic switching function.

• Supervision:

• Detects and reports service requests, acknowledgements and requests to terminate

service.

• Signaling:

• Transmits information about lines and trunks and information about other aspects of

call handling to control switching equipment.

• Routing:

• Converts address information to the location of the corresponding call line or to the

location of a trunk on the way to that line.

• Alerting.

• Notifies a subscriber of incoming calls.

BASIC CALL TYPES

Subscriber calls are grouped in two categories that distinguish one call from another. These

categories are referred to as call types. The basic call types are:

• Intra exchange calls: - these are calls between two subscribers served by the same

exchange. These calls are normally line to line calls.

• Inter exchange calls: - these are calls that involve two or more exchanges. Within a

given exchange there are different types of inter exchange calls.

An outgoing call is a call that goes out of the exchange via a trunk. If the call originated

in the same exchange, it is called an originating outgoing call.

An incoming call is a call that comes into the exchange via a trunk.

A tandem call is a call that comes into the exchange on one trunk and leaves the exchange on

another trunk. Thus a tandem call is both incoming and out going.

CALL PROCESSING STAGES:

An intra exchange call which is the simplest of the call types mentioned above, progresses

through four basic stages :

FIG:BASIC CALL STAGES IN INTRA EXCHANGE CALL

• Idle

• Digit reception and analysis

• Ringing

• Talking

While inter exchange calls are more complex and there call processing stages are somewhat

different as shown below:

FIG:BASIC CALL STAGES IN INTER EXCHANGE CALLS

TELECOMMUNICATION SYSTEMCOMMUNICATION

Communication is the process of establishing connection or link between two points

for information exchange.

OR

Communication is simply the process of conveying message at a distance or communication is

the basic process of exchanging information

The electronic equipments which are used for communication purpose , are called

communication equipments. Different communication equipments when assembled together

form a communication system.

Typical examples of communication system are line telephony and line telegraphy, radio

telephony and line telegraphy, radio broadcasting, point to point communication, computer

communication, radar communication, television broadcasting, radio telemetry, radio aids to

navigation, radio aids to aircraft landing etc. The earliest communication system namely line

telegraphy originated on eighteen fourties (1840s). In addition to this ,line telephony came a fey

decades later whereas radio communication could become possible in the beginning of

twentieth century on invention of triode valve. Radio communication was further greatly

improved during World War 2It became more widely used through the invention of transistor,

integrated circuits (ICs) and other semiconductor devices in the subsequent years. Also, in

recent years, communication has become more widespread with the use of satellites and fiber

optics. Today there has been an increasing emphasis on the use of computers in

communication.

Telecommunication system requires electrical energy for conversion of speech signals to

electrical signals, exchange switching, and transmission over a medium.

What are the components of communication system?

Source converter media destination

Different components of communication system in detail:

SOURCE: it is a originating point at which communication system in detail.

For example: when two person talking with each other from different places, then they are talk

with each other through a system called telephone which we say ‘A source’.

CONVERTER: It is a component of communication system that convert voice signal to

electrical signal.

For example :when a person is talking with another person through a source called telephone

than his voice is not reached to another person. A condition occur at which voice signal is

converted to electrical signal is called converter.

MEDIA: media is a component of communication system that is applied to convert the voice

signal to electrical signal. for example OFC{optical fiber cable}.

CONVERTER: at this stage reconversion takes place. It is a component of communication

system that convert electrical signal to voice signal. for example, when two man talking with

each other through telephone than one man can hear the voice of other man through converter.

DESTINATION: Destination is simply defined where system terminate. it is the point where

we receive the signal from a source called telephone on the other hand we say it receiver called

destination.

POWER SUPPLY: It should be noted that in exchange there must be 24 hours power supply.

In telecom system,dc power supply is only used.

-48v to -55v{dc}

it should be noted that there must be 24 hours power supply or power supply should not be cut

off for a minute. if this situation is ignore than there must be a great damage in exchange. as a

result exchange will destroy.

Parts of exchange:

1) Switch room(operation and maintenance center)

2) MDF{main distribution frame}

3) FRS{fault record system}

4) Power plant

5) E/A room {engine and alternator room}

6) Cash counter

7) Mobile section

8) Transmission

9) AC plant room

10) Customer care center

11) TRA branch{telephone revenue account}

During first three month i work in M.D.F room and study the power supply system in

general.

Supply system of exchange:

It is clear that in telecom system only DC power supply is used because of the following

reasons:

1. harmonics of AC may effect the speech signals.

2. Relays used in telecom system are more sensitive to DC than AC.

3. transistors and IC’s etc,being unidirectional devices, the use of DC has become

necessary.

4. arranging standby source to AC is difficult compare to DC for which secondary cells

5. can be used as S/B source.

6. Not hazardous to human life.

-In the exchange it should be noted that uninterrupted power supply is used. Simply its mean

that in the exchange 24 hours power supply is required that means the power supply should not

be cut off for a minute. for this we use another source called secondary or standby source which

comes in work when main source destroy.

-For any uninterrupted power supply system two sources are required. that are main source

or secondary source {or standby source}.

What is main source?

-Main source or normal source is one which supplies power to the load round .Normal

source is the source which is always in work. For example, in the Engine and alternator

room there are two ht panel, two transformer or two generator. from them one is called

main source which is always in work.

What is standby source?

Secondary or standby source is one which supplies power to the load only during the

absence of power from normal source. For example in the E/A Room there are two ht panel,

two transformers or two generator. each source is two. from them one is called main source

which is always in work or the other is called standby source which play a role in the

system when main source is destroy.

Sub-station room

Discussion about HT PANEL:

In the HT panel there are present a relay or a circuit breaker. There are present two HT

panel one is called main HT panel and other is called standby HT panel. Standby HT

panel works in the absence of main source. It should be noted that PSEB transfer 11K

supply to HT panel.

Transfer of 11K 3 phase AC supply to the transformer:

Now 11K 3 phase AC supply transfers to the transformer where it converted into 420K,3

phase AC supply. there are also present two transformers which play a role in the similar

manner that is the HT panel.

Control panel:

Now the transformers are connected to the control panel where all the switches to control

the transformer and generator are located.

GENERATOR: Generator is also connected to control panel .there are two generators

which are connected to the control panel. From them one is called main generator or other

is called standby generator.

Conversion of AC voltage to DC voltage:

Rectifier is used to convert AC voltage to DC voltage. It is simply defined as to arrive the

strength of weak signal.

OMC ROOM {operation and maintenance center}

All type of controlling is done by OMC room, which consist of a computer as a terminal

Interface. OMC room environment temperature between 20 degree to 24 degree C.

OCB exchange works under Unix operating system, for communication between human

and exchange through PC using windows NT environment. The terminals control all the

operation through commands.

PC: With the help of PC we check all the status of exchange hardware. It show the alarm

on terminal , if any critical problem in the exchange .All the facility, provided to the

subscribers through this terminal .The exchange data can also be analysis by DBMS

packages like FoxPro and visual FoxPro. For official work, on this pc terminals used the

software package MS office 2000{ MS-word,MS-excel,MS-access}. On the exchange

media OFC{optical fiber cable}PCM can be create, delete or modify and controlled by this

terminals.

From OMC room Now New communication technology like WLL{wireless local loop}are

control from the pc terminals. The version of WLL is the best that is CDMA{code division

multiple access}.WLL has many advantages in landline, It is very successful technology.

In the exchange media 4 terminals attached with exchange .These four terminals are

interconnected through exchange. these four terminals are:

1. CV12. CV23. CV34. CV4

CV stands for visual control

These four terminals are interconnected through exchange if any terminals has been linked

down, we can up the terminals with the help of other terminals. Number of terminals attached

to the exchange is depends upon the ‘How many number’ of user can be communicate with

exchange.

PC terminals increase or decrease at any time:

Parts of PC:

1. CPU2. VDU3. keyboard4. mouse5. CPU contains the following parts:

HDD,FDD,CD-ROM, etc.

For producing the hard copy, a DOT MATRIX 24 PIN and 132 columns printers is used.

These printer are direct attached with PC terminals Individual printer attached to the

individual PC terminals. One laser printer is used only for printing the official documents.

INTERNET: In OMC ROOM on PC terminals access the internet using a modem and

telephone line. Modem used for modulation and demodulation of data. Now ISDN

{integrated service digital network}technology used for high rate transferred of Data.

BATTERY AND POWER PLANT

The power plant is usually referred as’heart’ of telecom systems

1.signaling 2.switching 3.transmission

----three basic requirements for power supply:

a. reliability of the components

b. free from noise and humidity

c. sensitivity

Source of Power: 1.AC mains 220V single phase or 440V 3 phase 50 Hz.

2.S/B{standby}-S/B power supply like generator sets.

Types of power plant:

1.low size:5-12amp

2.medium:25-50amp

3.Large size:100-180amp

Parts of power plant:

1.Battery charger

2.Float rectifier

3.Switching cubical

4.Invertor

Battery charger +Filter circuit works as float rectifier.

Three way to use Battery:

1.charge discharge system

2.Standby battery system

3.Float battery system

-In OCB Exchange two battery SET A and SET B are used having the capacity of one set is

2000 amp/h. One set of battery consist of 24 cells. The Voltage of one cell is 2.15 to 2.20.

In OCB exchange used a VRLA Battery{value regulated lead acid}Battery used for

maintenance free.

Battery charge range from 44V to 65V.The maximum volt in one cell 2.56V

WORKING: Exchange required a load 51.5+_0.5

Hence exchange required -46V to –52V for working.

DESCRIPTION OF VARIOUS BLOCKS• DP (Distribution Panel)

Distribution point box commonly know as D.P. box is a terminal arrangement where

under ground cable pairs are connected to overhead wires or drop wires for providing

connections at subscribers premises.

It is a cast iron box with a facility for termination of distribution cable on pins fitted on an

insulating plate. The distribution cable pairs can be connected to these pins by soldering

at the rear. The overhead wires are connected by means of screwing nuts provided on the

front side of insulating plate.

Types of D.Ps.

There are two types of D.Ps. suitable for external/internal use. These are called internal

D.P. and external D.Ps. and are generally available in 10 or 20 pair sizes.

Location of D.Ps.

External D.Ps. are fitted on posts by means of suitable size of U backs. Internal D.Ps. are

fitted in side buildings on the wall at suitable location. In case of multi storied buildings

where the telephone demand is very high, the distribution cables or some times even the

primary cabled are terminated on distribution frames at suitable location, from where the

distribution cables of 20 pairs or 10 pairs sizes are taken to different floors or block and

terminated on 10 or 20 pair subs D.Ps. Individual wire are further provided from the subs

D.Ps. to the location of the telephone.

• Pillar

Pillar is fabricated from steel or cast from casings enclosing a frame-work on which cable

terminal boxes are mounted. The term "pillar" is used with reference to a flexibility point

where MDF's cables and DP's cables are interconnected.

• MDF (Main Distribution frame)

The Subscriber's lines enter an exchange through a number of large capacity U/G cables,

each of which serves a different part of the exchange area. The numbers given to the

subscriber's lines do not bear any relationship to the geographical location of the

subscriber. Hence, the exchange numbers included in any one cable are entirely

haphazard. Moreover, as subscribers cease to have telephones and new subscribers are

connected, the exchange numbering of the external cable pairs is constantly changing. On

the other hand, all lines within the exchange are in strict numerical order. It is, therefore,

necessary that some means must be provided for temporary connection between the two.

This conversion from the geographical order of the external pairs to the numerical order

within the exchange is carried out on a main distribution frame. MDF is separately

explained in another section.

• Exchange

Card is a basic functional unit of the exchange. Various cards are utilized for various

purposes e.g. Subscriber cards are utilized for termination of subscriber's cables coming

from MDF.

• PCM

Various subscriber's cables coming out from the subscriber's cards (After processing) are

terminated into the DDF (Digital Distribution Frame) located inside PCM in between

these two PCM tag block is there, which provide connectivity between these two.

Various DDF's cables combine together and terminated into the OFC module (which is

combination of electrical to light converter (Multiplexer and Demultiplexer). PCM is

separately explained in another section.

MAIN DISTRIBUTION FRAME

INTRODUCTION

To obtain flexibility in interconnecting, external line plants and the exchange equipment

and between different circuits in the exchange itself, certain arrangements is made by the

use of iron frames. These iron frames are called main distribution frames, intermediate

distributions frames or combined main and intermediate distribution frames, depending

upon their functions.

MAIN DISTRIBUTION FRAME (M.D.F.)

The subscriber’s line enter an exchange through a number of large capacity cables, each

of which serves a different part of the exchange area. The numbers given to the

subscriber’s lines do not bear any relationship to the geographical location of the

subscriber. Hence the exchange numbers include in any one cable are entirely haphazard.

Moreover, as subscribers cease to have telephones and new subscribers are connected, the

exchange numbering of the external cable pairs is constantly changing. On the other

hand, all lines within the exchange are in strict numerical order. It is, therefore, necessary

that some means must be provided for temporary connection between the two. This

conversion from the geographical order of the external pairs to the numerical order within

the exchange is carried out on a main distribution frame.

Functions of M.D.F:-

1. It is a testing point. There are two sections of this frame. One is called the exchange side

and the other is called the line side. If we have to check any fault we first check the exchange

side that if there is any jumper fault or some other break point. If there is no fault we check the

line side. We do this with the help of the wedge and testing handset. Some times we give the

loop to lineman to test the continuity of the line side. If he does not get the dial tone in

exchange side frame that means there is inside fault i.e. port of subscriber card is faulty.

2) It is an interface between exchange and outdoor networks.it is an interface between

exchange and external telephone network.To connect the outdoor network with exchange we

use jumper wire from exchange side to line side to provide connection from exchange to

subscriber end

3.Main distribution Frame acts as a safety point of exchange. There is a Gas Discharge tube

(GD) that acts as a safety measure for the exchange. GD has an inert gas inside it which starts

conducting when some high potential voltage comes across it. GD has its other point earthed.

So the whole current flows to the earth instead of flowing to the exchange side. Like this it

protects the exchange from over currents and over voltages flowing from the external network,

which can easily damage the exchange. The currents flow to the earth through GD and hence

protect the exchange. The complete MDF is also earthed to extend the further safety. We use

copper strip to provide the earthing as copper has low resistance value.

4.Main Distribution Frame permits the flexibility to provide the new connection. As anymodule

of exchange side can be connected to any vertical of line side that means any directory number

of exchange can be installed in any area. We can also shift the directory number from one space

to another space by changing the wire in the MDF.

5.Main distribution frame acts as a distribution point. All distribution of the subscriber numbers

is done from the MDF.

6.Main Distribution Frame acts as a termination point. As the whole cable from the exchange

side terminate at this point and the whole network from the external side terminate at this point.

MDF combine the switching equipment and external plant.

All the line with in the exchange in is strike in numerical order .Two conductor Jumper wire is

used in MDF {white and red}

FACILITIES PROVIDED BY M.D.F.

The M.D.F. provides for the following requirements:

• A means for permanently terminating the external cables.

• For mounting the protective devices connected to the incoming circuits.

• Providing the connection between the exchange side and the line side by the jumpers.

• An interception point for use in connection with fault locating tests. • M.D.F one side is exchange side and other line side.

In MDF as there are two sides one is exchange side other is line side exchange side consist of

Tag block in which each point is identified as NE (equipment number).In each Tag block there

are 128 termination point and numbering of these Tag blocks start from 0 and go up to number

depends upon the number if rack in the exchange. If there is only main rack this numbering will

go from 0 to 15.NE has 3 fields Rack-CN-Port number. As one CN consists of 128 subscribers

so the termination of one CN requires one Tag block. So NE at third point in 0Tag block is

written as 1-0-2 Here rack no. 1 CN no. is 0 & port no. is 3.Similarly in line side one

termination point is called pair. Pair has also three fields vertical-Tag block-Port number.

Number of vertical depends on the capacity of the exchange and Tag block numbering is 1 to 9

and 0 to127 and port number from 0 to 127. It can be written as 1-2-3 . Here 1 is the vertical

no. 2 represents the tag block and 3 the pair no

Main distribution frame is mainly divided in two parts.

(1) Vertical Side or Line side

(2) LEN side or Exchange side

VERTICAL SIDE

. All the part from vertical side to the subscriber are generally called outdoor section.

. 1 vertical has 10 tag block.

. Each tag block has 20 rows and each row has 5 tags. So each tag block has 100 tags.

. Connection between vertical side & subscribers are provided by jelly filled cables.

. This wires are first terminated in cabinet box, then according to requirements the

group of the wires (e.g. 200 wires, 100 wires etc.) are terminated in pillar box & from

here connections are given to the subscribers via DP box.

EXCHANGE SIDE:

• All the parts from LEN to the exchange is called indoor section.

• The connection of subscriber from exchange is terminated on this side of MDF.

• In 1 tag block there are 128 tags. Each tag block is divided in 16 tags. each tag consist of 8

subscriber links.

•On the vertical side there is 100 tag in one vertical tag block where as on the LEN side there is

128 tags on each LEN block. The reason for this difference is that there is always a reserve

of spare capacity in the external cables to cover fluctuations in the distribution of the

subscribers lines as between the different localities served by the cables

DIFFERENT TYPES OF FAULTS:

The faults are given below which are established in communication of subscriber with

exchange.

LOOP FAULT:-If two wires are joined together because of improper connection,

storming air etc. then this type of fault occur.

EARTH FAULT:-If two wires get scrape at some places and if this wire comes in

contact with tree, pillar or any metal objects then this type of fault occurs.

CABLE FAULT:-For outdoor connections, jelly filled wires are used which are affected

by natural causes such as rain, earthquake etc. At such time this fault occurs.

DISCONNECT FAULT:-This type of fault occurs due to the breaking of wires between

the vertical side & LEN side.

LOCATION OF FAULTS

This can be determined by putting pack up or wedge.

If pack up is put in one of the tag of LEN side and if dial tone is received only upto the

LEN side then fault is in the outdoor side and if tone is received from the subscriber only

upto the vertical side then fault is in the indoor side.

This faults are also identify by either subscriber line tester or by using the computerized

programme.

PROTECTIVE DEVICE USED ON M.D.F.

• Fuses

These are the devices used to protect apparatus and wiring from excessive currents.

A fuse is a small length of thin wire which melts if there is an excess of current and

disconnect the equipment before possible damage.

The rated current of fuse is the maximum current which it can carry without melting or

fusing.

The types of fuses used for connecting line to equipment are:

(1) Glass type

(2) Gate type

GAS DISCHARGE TUBE (GD TUBE)

In case of heavy lighting discharges or induction of high voltages, gas discharge

protectors are used as protective device to protect the communication lines and

equipments from damages due to high voltages. The gas discharge protector essentially

consists of two of three tungsten electrodes sealed in a special glass envelope or ceramic

envelope containing a mixure of inert gases , mainly neon. In case of three pin G.D.

tube, Two of the electrodes are for connections to the lines and third is the earth electrode

and in case of two pin device, one electrode is connected to a limb of a line and other

electrode is connected to earth. If the potential difference across the electrodes rises to a

certain critical value, the gas is ionized and becomes conducting. This condition will

continue till the potential difference across the electrodes falls to the extinction voltage

value.It conducts till 200mA but when current reaches 350 mA thn it acts as insulator.

For voltages less than striking value, it will not conduct. For normal operating voltages

on the lines, it offers extremely high impedance and thus does not introduce any

transmission loss.

APPLICATIONS:-

• MDF mainly provide connection between outdoor and indoor.

• MDF is basically the protection system for exchange.

• It uses Fuse as a protection device which prevents to reach the high current from

outside to exchange.

• It uses Gas Discharge Tube (GD Tube) which provide protection against high

excessive voltage.

MDF Tools :

1)Wrapping Gun

2)Vacuum cleaner

3) Drill machine

4)subscriber line tester

5)Wedge

TRAINING PROFILE

Operation and Maintenance

Operation and Maintainance Control Department is responsible for proper operating conditions.

If in any case the trouble occurs – it is diagnosed- the fault is analyzed, card restoration is

carried out, and if the problem still persists, a detailed introspection reveals the fault then

replacements are carried out as desired.

At Dasuya SDC the OCB-283 system switch is installed of CIT ALCATEL.To this

switch 4 PC terminals called CV1,CV2,CV3,CV4 are connected.There is GSM BTS,WLL

CDMA BTS,PSTN connected to this switch.

Work Profile during first three month:

1) To carry out work execution in indoor for broadband using DOTSOFT intranet.

2) To swap contents of one mobile to another, to block up incoming/outgoing of mobiles using

KENAN FX software which is interfaced to mobile switching system at jallandhar.

3) To check new orders of lines.enquiry about telephone number,ISDN numbers is carried on

DOTSOFT.

4) Jumpering in M.D.F. room for new lines and also for broadband connections.

5) To handle complaints of customers about faulty telephone numbers at M.D.F room and

troubleshooting them by checking which fault is there like replacing faulty GDs with right

one,or replacing broken jumper wire.

6) Tocreate dynamic locking at ports in line side of the desired subscriber by dialing

124abcdabcd from that port using handset

7) To configure modems at houses of subscribers who applied for broadband connection.

LIST OF WORK ORDERS ON DOTSOFT FOR BROADBAND CONNECTION