PRESENTED BY:

GAURAV BAJAJ

0616431042

PSIT,KANPUR

INTODUCTION TO COMMUNICATION INTRODUCTION TO BSNL 5-ESS SWITCH REQUIREMENT OF 5-ESS SWITCH ELEMENT OF 5-ESS SWITCH APPLICATION OF SWITCH

COMMUNICATION MEANS SHARING INFORMATION AND RESOURCES.

“TELEPHONE” IS A COMBINATION OF TWO GREEK WORDS “TELE” MEANS “FAR: AND “PHONE” MEANS “VOICE AND SOUND”.

IN 1874 ALEXANDER GRAMBELL INVENTED THE PRINCIPLE OF TELEPHONE.

“MR. WATSON COME HERE”.

NOW TODAY, TELECOMMUNICATION HAVE CROSSED ALL BOUNDARIES, WITH MOBILE AND SATELLITE TECHNOLOGIES.

IT HAS 47 MILLION ACCESS LINE ACROSS INDIA.

IT OFFER FOLLOWING SERVICES IN INDIA.

LANDLINES GSM AND CDMA

SERVICES IN WIRELESS

SATELLITE COMMUNICATION

INTERNET TELEGRAPH

IN THIS SERVICE BSNL IS FOR 100 YEARS.

32 THOUSAND ELECTRONIC EXCHANGE.

326 DIGITAL TRUNK AUTOMATIC EXCHANGES(TAX),DIGITAL PULIC SWITCH TELEPHONE NETWORK(PSTN).

TELEPHONE NETWORK INTERLINK 2.4LAKHS KMS. OF OPTICAL FIBRE.

OUTDOOR NETWORK1.MAIN DISTRIBUTION FRAME(MDF)2.DISTRIBUTION FRAME(DP)3.PILLAR TRANSMISSION LINE1. SUBSCRIBER T0 EXCHANGE (LOCAL EXCHANGE)2. EXCHANGE TO EXCHANGE(TANDEM EXCHANGE) INDOOR NETWORK1.SWITCHING SYSTEM2.MODULATIN PROCESS

EWSD OF SIEMEN(GERMANY).

AXE OF ERICSSON(SWEDEN).

CHENNAI FETEX(JAPAN).

OCB OF ATCATEL(FRANCE).

5ESS OF AT&T(USA)

SYSTEM X3 OF GDT(UK).

NEAX OF NEX(JAPAN)

IT IS DIGITAL EXCHANGE THAT SERVE AS

A LOCAL,TOLL,TANDEM AND OSPS.

IT CAN SERVE 100 TO I.0 LAKH

SUBCRIBERS

IT IS HIGHLY RELIABLE.

IT’S MAIN ADVANTAGE IS THAT IT CAN BE

CONTROLLED BY ANY METRO LOCATION

Some part it is great technology

Today, we need this technology

ANALOG SYSTEM translating it into electronic

pulses. It's not that complicated a

concept it's fairly inexpensive to use. Distortion may occur at

receiving end It does not provide multiple

services over a single channel

Analog gives better quality

DIGITAL SYSTEMrepresented by a series of "1"s

and "0"s.

The process is complicated.

It is expensive.

distortion-free data received at the end

It provide multiple services over common channel.

Digital give better quality but less than analog

IT PERFORM 95% OF THE CALL PROCESSING AND MAINTANENCE FUNTION.

LINE AND TRUNK SCANNING TONE GENERATION DIGITAL ANALYSIS CALL ROUTING CIRCUIT AND PACKET SWITCHING ANNOUCEMENT ROUTINE MAINTANENCE1. CALL WAITING2. ABBREVAITION DAILLING3. CALL DIVERSION4. CONFERENCE CALL

MSCS: MSCU (message

switch control unit)-provides control over the MSPU.

MSPU (message switch peripheral unit)- Processes control time slot.

ONTC: CMCU

(communications module control unit)- Provides timing and control.

TMSU (time multiplexed switch unit)- terminates NCT links and switches data and control time slots between them.

AM FUNCTION: *Administrative

data processing *Traffic

Measurement – System performance report

*Memory Management

*System Maintenance

*Allocating trunks for call processing.

STEP INVOLVE IN CALL PROCESSING

Origination Digit analysis Routing/

Screening Charging Termination