adsl

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ASYMMETRIC DIGITAL SUBSCRIBER LINE ASYMMETRIC DIGITAL SUBSCRIBER LINE

ADSL ADSL

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ADSL

•ADSL (Asymmetric Digital Subscriber Line) :

teknologi akses, yang memungkinkan terjadinya

komunikasi data, voice dan video secara bersamaan,

menggunakan media jaringan akses kabel tembaga 1

pair.

•Disebut asimetrik karena rate / kecepatan transmisi

dari sentral ke pelanggan (dowstream) tidak sama

dengan rate transmisi dari arah pelanggan ke sentral

(upstream)

•Bit rate downstream 8 Mb/s, upstream !"

kb/s

• plikasi ini digunakan untuk menyalurkan layanan

broadband

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ADSL#on$igurasi dasar ADSL

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ADSL!ara kerja "#$

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ADSL #omponen pembangun ADSL %

•%odem "#$

•#plitter

•"#$%

•&emote "#$%

• '% #witch

•&#

•&"*#•+%#

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ADSL

•%odem "#$ merupakan perangkat di sisi

pelanggan/client sehingga data digital dapat

diterima dan dikirimkan melalui kabel telepon,

atau berungsi sebagai pengubah sinyal analogto digital atau sebaliknya. eberapa merek

modem sering dipakai diantaranya : lcatel,

-', uawei, "ear 0lobal, llied 'elesyn,

ricsson, dsb.

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ADSL

•#plitter berungsi sebagai pemisah/pengenal

antara sinyal analog (voice) ataukah data. ika

yang datang adalah voice, maka inormasi

tersebut akan diteruskan ke telepon. ika yangdatang adalah data, maka inormasi tersebut

akan diteruskan ke modem untuk selanjutnya

ke computer. 2rinsip kerja dari splitter adalah

menggunakan ilter, $owpass ilter danhighpass ilter.

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ADSL

•"#$% dalah 3onigurasi perangkat 4"#$ yang secara isik

modem sentralnya berupa card module yang berisi banyak

modem sentral.

•5ungsi "#$% diantaranya :

• #ebagai ilter 6oice dan "ata• #ebagai %odulator / "emodulator "#$

• #ebagai %ultiple4er (#ebagai '% )

• 62 %ultiple4ing

• 6! %ultiple4ing• 'raic management

• 7% 5unctionality

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ADSL

•&%7' "#$%, %erupakan "#$% yang dipasang

didaerah yang jauh/terpencil tetapi dimungkinkan banyak

pelanggan yang menggunakan asilitas "#$. 3apasitas dari

&emote "#$% ini biasanya tidak terlalu besar.

• '% #witch

5ungsi '% #witch adalah :

• 'itik penyambungan/switching (cross connect ) antara

"#$% dan &#

• #ebagai gateway jaringan '% • Multiplexer paket '% dari "#$%

• 'itik interkoneksi antara '% dan 2

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ADSL

•&#

roadband &emote ccess #ervice berungsi :

• %elakukan routing dari user ke #2 tujuan

• 2 management

• 3onigurasi interface user

• #ebagai #2 gateway

• #ebagai internet gateway

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ADSL

•&"*#5ungsi &"*# adalah :

• Authentication 8 mengidentiikasi user melalui

user name, password, calling number

• Authorization8 melayani akses user sesuaidengan service level nya ($"2)

• Accounting 8 melakukan proses billing and

inormasi penggunaan seorang user

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ADSL

•+%#

+etwork %anagement #istem berungsi :

• "#$% management

• %onitoring status/kondisi "#$%

• uka/tutup port pelanggan

• Setting speed pelanggan

• %onitoring status/kondisi modem pelanggan

• '% Switch management • &# management

• &adius management

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Introduction

ADSL is a form of DSL, a data communications technologythat enables faster data transmission over copper telephonelines

ADSL is capable of providing up to 50 Mbps, and supports voice, video and data.

ADSL is the ! "roadband #hoice in the $orld %ith over

&0' mar(et share

ADSL is no% available in every region of the %orld

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$hat does ADSL mean

A symmetric ) *he data can flo% faster in one directionthan the other. Data transmission has faster do%nstreamto the subscriber than upstream

Digital ) +o type of communication is transferred in ananalog method. All data is purely digital, and only at theend, modulated to be carried over the line.

Subscriber Line ) *he data is carried over a single t%istedpair copper loop to the subscriber premises

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ADSL standards ADSL standards

Standard nameStandard name &ommon name&ommon name DownstreamDownstream

raterate'pstream'pstream

raterate

'* 0.99.1'* 0.99.1 "#$ (0."%') "#$ (0."%') ; %bit/s; %bit/s 1.< %bit/s1.< %bit/s

'* 0.99.'* 0.99. "#$ $ite (0.$ite) "#$ $ite (0.$ite) 1.= %bit/s1.= %bit/s <.= %bit/s<.= %bit/s

'* 0.99.>/?'* 0.99.>/? "#$ "#$ 1 %bit/s1 %bit/s 1.< %bit/s1.< %bit/s

'* 0.99.>/? nne4 '* 0.99.>/? nne4 "#$ "#$ 1 %bit/s1 %bit/s >.= %bit/s>.= %bit/s

'* 0.99.>/? nne4 $'* 0.99.>/? nne4 $ &@"#$&@"#$ = %bit/s= %bit/s <.; %bit/s<.; %bit/s

'* 0.99.='* 0.99.= "#$A "#$A ? %bit/s? %bit/s 1.< %bit/s1.< %bit/s

'* 0.99.= nne4 $'* 0.99.= nne4 $ &@"#$A&@"#$A ? %bit/s? %bit/s 1.< %bit/s1.< %bit/s

'* 0.99.= nne4 %'* 0.99.= nne4 % "#$A "#$A ; %bit/s; %bit/s >.= %bit/s>.= %bit/s

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ISDN

ADSL

FTTx, VDSL2, ADSL2plus

EnhancedCopper

Hybrid FibreCopper

!ure Fibre

ADSL Speed #omparison

Voice band"ode#

FTTH

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ADSL -ange

In general, the maimum range for DSL %ithout a repeateris 5.5 (m As distance decreases to%ard the telephone company office,

the data rate increases

/or larger distances, you may be able to have DSL if yourphone company has etended the local loop %ith optical

fiber cable

Data ate ire gauge ire si*e Distance

1.= or %bps ? B0 <.= mm =.= km

1.= or %bps C B0 <.? mm ?.C km

C.1 %bps ? B0 <.= mm >.D km1.= or %bps C B0 <.? mm .D

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ADSL Speed /actors

*he distance from the local echange

*he type and thic(ness of %ires used

*he number and type of oins in the %ire

*he proimity of the %ire to other %ires carrying ADSL,ISD+ and other non)voice signals

*he proimity of the %ires to radio transmitters.

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ADSL net%or( components

*he ADSL modem at the customer premises1A*2)-3

*he modem of the central office 1A*2)#3

DSL access multipleer 1DSLAM3

"roadband Access Server 1"AS3

Splitter ) an electronic lo% pass filter that separates theanalogue voice or ISD+ signal from ADSL data fre4uenciesDSLAM.

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ADSL Loop Architecture

+S

&entral -$$ice Subscriber premises

.oice Switc

DSL

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ADSL -e4uirements

hone)line, activated by your phone company for ADSL

/ilter to separate the phone signal from the Internet signal

ADSL modem

Subscription %ith an IS supporting ADSL

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6o% does ADSL %or(

ADSL eploits the ADSL eploits the unused analogue bandwidthunused analogue bandwidthavailable in the %iresavailable in the %ires

ADSL %or(s by using a fre4uency splitter device to split a ADSL %or(s by using a fre4uency splitter device to split a

traditional voice telephone line into t%o fre4uenciestraditional voice telephone line into t%o fre4uencies

? =,;D= 1>; 11<? 3E

S01S01 DownstreamDownstream'pstream'pstream

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ADSL Modulation

Modulation is the overlaying of information 1or the signal3onto an electronic or optical carrier %aveform

*here are t%o competing and incompatible standards formodulating the ADSL signal

#arrierless Amplitude hase 1#A3

Discrete Multi)*one 1DM*3

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#arrierless Amplitude hase

#arrierless Amplitude hase 1#A3 is an encoding#arrierless Amplitude hase 1#A3 is an encodingmethod that divides the signals into t%o distinct bandsmethod that divides the signals into t%o distinct bands

!.!. *he upstream data channel 1to the service provider3, %hich is*he upstream data channel 1to the service provider3, %hich is

carried in the band bet%een 75 and !&0(68carried in the band bet%een 75 and !&0(68

!.!. *he do%nstream data channel 1to the user3, %hich is carried in*he do%nstream data channel 1to the user3, %hich is carried in

the band from 700(68 to !.!M68 .the band from 700(68 to !.!M68 .

*hese channels are %idely separated in order to*hese channels are %idely separated in order tominimi8e the possibility of interference bet%een theminimi8e the possibility of interference bet%een the

channels.channels.

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Discrete Multi)tone 1DM*3

Discrete Multi)*one 1DM*3 separates the DSL signal sothat the usable fre4uency range is separated into 75&channels of 9.:!75(68 each.

DM* has 779 do%nstream fre4uency bins 1or carriers3 and:7 upstream fre4uency bins.

DM* constantly shifts signals bet%een different channelsto ensure that the best channels are used for transmissionand reception.

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*he DM* fre4uency bands

/re4uency Division Multipleing 1/DM3

;cho #ancellation

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ADSL rotocol stac(s

2ternet o3er2ternet o3er

A0M (2oA)A0M (2oA)+ o3er A0M+ o3er A0M

(+oA)(+oA) o3er A0M o3er A0M

(oA)(oA) o3er 2ternet o3er 2ternet

(o2)(o2)1ati3e A0M1ati3e A0M

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oint)to)oint rotocol over ;thernet over A*Moint)to)oint rotocol over ;thernet over A*M

1o;oA31o;oA3

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#onclusion ros < #ons

Why ADSL?Why ADSL? Simultaneous Internet and voice/fax capabilities over aSimultaneous Internet and voice/fax capabilities over a

single telephone linesingle telephone line Uninterrupted high!speed Internet access that"s al#aysUninterrupted high!speed Internet access that"s al#ays

on!lineon!line $ost!effective solution for society$ost!effective solution for society Data Security that exceeds other technologiesData Security that exceeds other technologies %ast do#nload speeds%ast do#nload speeds

ADSL disadvantages&ADSL disadvantages&

Distance!sensitiveDistance!sensitive Slo#er upload speedsSlo#er upload speeds 'hone line re(uired'hone line re(uired

adsl

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