bb students

8/3/2019 BB Students

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AbstractAbstract

Broadband Internet access, often shortened to

just "broadband", is a term describing a service thatprovides a connection to the Internet. The bit-rate

supported is higher than that supported by some

other service, historically a 56 kbit/s modem.


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Existing SystemExisting System

DSL is a group of technologies that

provide high-speed Internet access, by

using the ordinary telephone lines. It

converts the ordinary telephone line intoa high-speed passage for digital audio,

video and data.


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Proposed SystemProposed System

ADSL is a type of asymmetric DSL

which allots more bandwidth for

downstream than upstream. The

downstream speed depends on thedistance of the user from the service

provider Most of the Internet users aim

at high downloading, as compared touploading on network.


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BSNL-overview


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Services offered by BSNLServices offered by BSNL

y WLL

y INTERNET

y BROAD BAND

y MANAGED NETWORK SERVICES

y MPLSVPN

y ISDN

y LEASED LINES


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Services offered by BSNLServices offered by BSNL

y VSAT

y IN SERVICES

y VALUEADDED SERVICES

y ENTERPRISE SOLUTIONS

y TELEGRAPH

y EPABX

y DATA COMMUNICATIONS

y DSPT SERVICE


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IP FUNDAMENTALSIP FUNDAMENTALS

OSI OPEN SYSTEM INTERCONNECTION.

Circuit-Switching. Packet switching.

IP address


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INTERNATIONAL STANDARDS

ORGANIZATION

OPEN SYSTEM INTERCONNECTION

PHYSICAL

DATA LINK

NETWORK

TRANSPORT

SESSION

PRESENTATION

APPLICATION


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Data link layer protocolsData link layer protocols

y DLC : Data Link Control

y HDLC : High-Level Data Link Control.

y PPP : Point-to-Point Protocol.

y PAP : password authenticationprotocol.

y CHAP : Challenge HandshakeAuthentication.


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NETWORK LAYERPROTOCOLSNETWORK LAYERPROTOCOLS

y IP : Internet Protocol.y ARP : Address Resolution protocol.y RARP : Reverse address Resolution

Protocol.y ICMP : Internet Control Message

Protocol.

TRANSPORT LAYERPROTOCOLSTCP : Transmission Control Protocol.

UDP : User Datagram Protocol.


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BROAD BAND


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ADSLADSL

y The distinguishing characteristic of ADSL overother forms of DSL is that the bandwidth isgreater in the direction to the customerpremises than the reverse, giving rise to isasymmetric characteristic.

Frequency Spectrum of ADSL


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What factors can effect ADSL circuit

quality?

Return Loss

Insertion Loss Longitudinal Balance

Crosstalk

Noise

ADSL IMPAIRMENTS


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ADSL 2ADSL 2

It optionally extends the capability of basicADSL in data rates to 12 Mbit/s downstreamand 3.5 Mbit/s upstream .

Wi-FiWireless Technology is an alternative to wired

Technology for connecting the devices inwireless mode


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NetworkConnectivitydiagramNetworkConnectivitydiagram

Tier 2 LAN Switch

ADSL

terminals

FE

ADSL

terminals

..DSLAM.. X-ge B

X-ge C

ADSL

terminals

FE

ADSL

terminals

..DSLAM..

X-ge D

X-ge E

ADSL

terminals

FE

..DSLAM..

Tier1 GigE

Aggregation

SW

GigE

BB

Broadband

RASGigE

Core

router

ADSL

terminals

..DSLAM..


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Project -1

Project 3

NIB-1

BRAS

PEPE

Router

NRAS

PE

PE

RouterNIB-1

ROUTER

PE

PE

Router

Load

Balancer

Existing Network TopologyExisting Network Topology


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Project -1

Project 3

BRAS

PEPE

Router

NRAS

PENIB-1

PE

RouterNIB-1

ROUTER

PE

PE

Router

Load

Balancer

MultiPlay

BNG

PE

Router

PE

Network Topology withNetwork Topology with MultiplayMultiplayy a


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Typical DSLAM Connectivity

DSLAM

F

D

F

TIER 2

P

S

T

N

MDF

MDF

ER

Fiber

Connectivity

Copper Pair

ER Equipment RoomFrom SubscriberS

DSLAM SITE


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Network Topology for MPLSNetwork Topology for MPLS--basedbased

VPNVPN

Corp A

Site 2 Corp A

Site 3

CE: Customer Edge Router(Standard CPE device)

PE: Provider Edge Router(withMPLS VPN functionality)

P: Provider Core Router(withMPLS functionality)

Provider MPLS Core Network

Corp A

Site 1


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ProtectionProtection

RPR has two protection mechanism.

Wrapping

Steering.


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ConclusionConclusion

y ADSL is the advanced technology which is used

now a days for wired networks .

y Wireless technology is an alternative to wiredtechnology for connecting the devices in

wireless mode by using wi-fi .


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aa

QUERIES..?


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