PRESENTATION ON

BROADBAND NETWORKING

PREPARED BY :-

HIMANSHU MINZ VIKAS UPADHYAY

VOCATIONAL TRAINING AT BSNL,DURGBATCH 4 SESSION 2014

An always on data connection that is able to support interactive services

Has the capability of minimum download speed of 256 kbps to an individual subscriber from the Point Of Presence (POP) of the service provider.

WHAT IS BROADBAND ?

WIRELESS

3G MOBILE

Wi-Fi (Wireless Fidelity)

Wi Max

LMDS & MMDS

FSO (Free Space

Optics)

Satellite

WIRELINE

DSL (Digital

Subscriber Line)

Cable Modem

Optical fiber

technology (FTTH)

PLC (Power Line Communication)

BROADBAND ACCESS TECHNOLOGIES

ADSL (Asymmetric DSL)

VDSL (Very high Speed DSL) HDSL (High Data Rate DSL) SDSL (Symmetric DSL)

DSL (DIGITAL SUBSCRIBER LINE))

It requires only one pair of wires. Transmission speed ranges from 64 Kbps to 2 Mbps. In this case the upload and download

streams are of equivalent bandwidth. It’s used where high upload is required.

It has the characteristic that the data can flow faster in one direction (i.e. downstream ) than other (i.e. upstream). Speed

above 2 Mbps for downstream

Frequency plan for ADSL

ADSL

ADSL uses DMT (Discreet Multi Tone ) Modulation. Bandwidth from 0 to 1.1Mhz is divided into 256 sub-carriers with each occupying 4Khz. Lower 1 to 6 sub-carriers are reserved to pass the 4Khz analog voice.

Wi-fi , short for wireless fidelity. Product of 802.11 developed by( IEEE) for

LAN connection. Network operates on unlicensed basis in

2.4-5 GHz radio bands & provide multiple data rates max-54 Mbps.

Cheapest , compatible , quality of service. Popular on residential users.

Wi-Fi

CPE (Customer Premises Equipment)

BROADBAND COMPONENTS

MODEM

A modem (modulator-demodulator) is a device that modulates an analog carrier signal to encode digital information, and also demodulates such a carrier signal to decode the transmitted information.

SPLITTER

It splits the source optical beam into multiple fibers.

ROUTER

A router is a specialized device . It connects one network to another directing data packets from one destination to another. A router connects one LAN (Local Area Network) to another

DSLAM is an integrated hardware and software system that allows the user to access broadband as well as originate and terminate phone calls over the same single pair of Cu wires

It has built in splitter which splits voice and data. Where the voice follows the normal conventional path from the exchange, data is aggregated and uplinked through ETHERNET pot.

It multiplexes and de-multiplexes aggravated traffic through a single high speed link.

It forwards voice to exchange and data to LAN switches. DSLAM are available in 6 types based on the no of ports according to the

requirement (480, 240, 120, 64, 32, 16)

DSLAM (DIGITAL SUBSCRIBER LINE ACCESS MULTIPLEXER)

LAN switching is a form of packet switching used in local area networks. Switching technologies are crucial to network design, as they allow traffic to be sent only where it is needed in most cases, using fast and hardware-based methods.

For broadband we have Tier2 (for range of 10 KM)and Tier1 (for range of 40 KM) switches.

SDH Transport removes the range for tier1 and tier2 connection to any distance

LAN SWITCHES

It acts as an interface between DSLAM and BRAS

Management of statistical data .

For forwarding and control of data packets.

Capable of unblocked switching.

Monitoring and fault diagnosis .

Managing and calculating the route

FUNCTIONS OF LAN SWITCHES

Termination of DSL customer.

Allotment of IP address.

Bandwidth control using rate limiting.

Activation of an edge router for terminating VPN traffic.

Supports lawful interceptions and monitoring.

BROADBAND REMOTE ACCESS SERVER

SYSTEM

PHONE

SPLITTER

ADSL

DSLAM

TIER2 SWITCH

TIER1 SWITCH

BRAS

CORE ROUTER

CORE NETWORK INTERFACES

THANK YOU