Greetings to all

Telecommunication

( Broadband )

By

Marcello PASSERINI

Broadband Home Computing Engineer

Contents:

• Definition

• Brief History

• Last Mile or Local Loop

• PSTN, ISDN, ADSL

• Future of telecommunication

• Conclusion

Definition:

Any transmission, emission , or reception of signs, signals, writing, images and sounds or intelligence of any nature by wire, radio, optical or other electromagnetic systems.

Any transmission, emission, or reception of signs, signals, writings, images, sounds, or informationinformation of any nature by wire, radio, visual, or other electromagnetic systems.

Alessandro VoltaBattery in 1800

Guglielmo MarconiWireless Telegraph

Or RADIO in 1896

Elisha GrayTelephone

14th February 1876 @ 12.00 am

Alexander Graham BellTelephone

14th Febraury 1876 @ 10.00 am

Antonio MeucciTelephone

Patent caveat in 1871

RadioTelephone

What is ADSL ?What is ADSL ?

symmetric

igital

ubscriber

ine

LocalExchange

Asymmetric Digital Subscriber Line

End User

Existing telephony

downstream

up to 8 Mbpstypically 500 -2 Mbps

upstream

up to 800 kbpstypically 128-400 kbps

‘‘It’s like a voice-band modem on It’s like a voice-band modem on steroids’steroids’

ADSL in the Home or Office

Incomingline

Networktermination Splitter

Telephony +ADSL signal

TV & set-top box PC & router

ADSLmodem

25 k

Hz

1100

kH

z

AD

SL

0 kH

z

3.4

kHz

Voi

ce/F

ax

0.5 Mbps2 Mbps

4 Mbps6 Mbps

8 Mbps

High rate low range 3.5Km

Low rate high range

Performance Trade OffsRATE ADAPTIVE ARRIVES

Limit moves to……...5.5km

Information highway speed

Low-band

Mid-bandBroad-band

High-bandAccess Evolution

Voice-band modem (56k)

Today

56k ADSL ( up to 8 mega)

8M

Fibre and VDSL ( up to 52 Mega)

Hybrid FibreCopper

52M

ISDN ( 64+64=128k)

EnhancedCopper

128k

Pure Fibre

>100M

FTTH ( over 100 Mega)

BROADBAND BY SATELLITE

Service Provider

BT ExchangeSatellite Station

Fibre Fibre

Copper Local Network

2mbits/sec56k bits/sec

256kb/sec

256kb/sec

BROADBAND BY SATELLITE

Service Provider

Satellite Station

Fibre

2mbits/sec

256kb/sec

256kb/sec

More Bandwidth

Today’sNetworkToday’sNetwork

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Thank you for listening