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A PRACTICAL REPORT ON OCB283 SWITCH ROOM

SUBMITTED TO MANOJ GUPTA

HOD ECE AIET

SUBMITTED BY SANJEEV KUMAR ECE EC\07\89 AIET

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MTNL(MAHANAGAR TELEPHONE NAGAR

LIMITED)

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INTRODUCTION

In 1911 first telephony system introduced in India with manual exchange

In 1926 first automatic exchange was established

First MTNL was set up on 1stapril 1986 It has more than 10 million customers 103138.2 million investment by MTNL on

set up

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ROLE AND LOCATION

ROLE Alcatel 1000 E10 provides all modern communication services: Basic Telephony, ISDN (Integrated Services Digital Network), Centrex, digital cellular radiotelephony and all the Intelligent Network applications.

It handles all accepted signaling systems in a current total of over 80 countries and is built in accordance with recognized international standards.

According to application According to region

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Packet

Switching

Transact Free call

Intelligent

Netw

ork

Mobile

Telephony

Visio conference

BroadbandATM

ALCATEL

1000 E 10

ISDNTM

N

Tele

com

mu

nica

tion

s

Man

agem

e

nt

Net

wor

k

Min

itel

Vide

otex

tVa

lue

Add

edNe

twor

k Se

rvice

s VA

N’S

Alcatel 1100

Alcatel 1400

Alcatel 900

Alcatel 1000

Asynchronous

Transfer

Mode

Alcatel 1300

Alcatel 1100

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BACKBONE OF TELECOMMUNICATION

CNECNE

CSN

CNE

PSTN/ISDN

Alcatel

E

1000

10

SSP

SCP

SCP

SCP

IN – Intelligent network

Service control

point

Service switching point

NMC/SMS NetworkManagementcentre

Service managementsystem

TMN Telecom Management network

CSN

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Services provided

Call handled Subscribers facilities Analog Digital Services access switching functions Operation\maintenance functions General performance

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Channel associa.

Telephone network

DATA network

Value added

network

Operation and

maintenance network

PABX

NT

ALCATEL 1000 E10

1

2

3

8

7

6

54

CCITT N07 NETWORK

EXTERNAL INTERFACE

ALCATEL 1000 E10

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GENERAL FUNCTIONAL BREAKDOWN

SUBCRIBER

ACCESS

SUBSYSTEM

CONNECTIONAND

CONTROL

OPERATIONAND

MAINTENANCE

OCB283

DATA

NETWORK

TELEPHONENETWORK

VALUE ADDED NETWORK

CCITT N07 SIGNALLING

NETWORK

NT

PABX

OCB 283

ALCATEL 1000 E10

OPERATION AND MAINTENANCE

NETWORK

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FUNCTIONAL ARCHITECTURE OF OCB283

SMX

PU

/PE

ET

A

CO

M

TR

PC

TX

MR

GX

MQ

OM

Subscriber Access Subsystem

Alarms

Circuits and recorded

announcement equipment

TMN

PGS

LR

LR

LR

BT

UR

M

CSNL

CSND

(CSED)

COMMUNICATIONMULTIPLEX

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HARDWARE ARCHITECTURE OF OCB283

SMX

STS 1 x 3

CSNL

CSND

CSED

Circuits and announcement

machine

LR

SMT

( 1 TO 28) X 2

SMA

( 2 TO 37)

SMC

2 TO 14

1 TO 4 MAS

1 MIS

SMM

1 x 2

LR

LR

AL

TMN

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Redundancies

Redundancy at the SM and ML level

Multiplex redundancy

Power supply redundancy

Time base distribution redundancy

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STANDARD CONFIGURATION

Small (P) configuration

Medium configuration

Large (GD) configuration

Compact (C3) configuration

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GENERAL ARCHITECHTURE OF SMC

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SOFTWARE ARCHITECHTURE

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DEFENCE

A station detects its own faults

A station is monitored from the outside

A OCB 283 station is a confinement unit

A station possesses a status

A station is a reconfigurable unit

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TOKENS AND RINGS

GENERAL FEATURS OF TOKEN RING TOKEN RING COUPLER DESCRIPTION OF OPERATION

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COMMUNICATION

SMM

SMC

SMA,SMT,SMX

MIS 16Mbps

4&16Mbps

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ALARM COLLECTION

The system that records and displays the alarms is responsible for collecting the signals induced by alarm loops, by tele command transmissions (supervision, miscellaneous tele commands) and reception of command signals (reception tele commands).

The system comprises 1 to 4 Alarm Collection and Display circuits (CVA).

Each CVA is made up of two totally independent systems which operate in Pilot/Reserve mode, comprising:

a Main Alarm Coupler (CCAL), a Secondary Alarm Coupler (CSAL), an Alarm Multiplex (MAL),

20CSND

CONNECTING

SWITCH-

BOARD

CSNL

CSND

CONNECTING

SWITCH-

BOARD

Digital Subscribers

AnalogSubscribers

UCN

CNL

UCN

Digital Subscribers

Analogue Subscribers

CSNL

CNE

CNL

CNE

CSN

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CALL GENERATION

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SMC

SMT2G

SMA

SMA

SMC

SMT2G

SMC

SMA

SMA

SMA

SMC

SMT1G

SMA

SMA

SMC

SMT1G

SMC

SMC

SMC

SMC

SMC

SMC

SMC

SMC

STS

SMM SMA

SMA SMC

SMT1G SMA

SMT2G

CA CB CC UA UB UC UD UE

RACK ASSEMBLY

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THANKYOU