PRESENTATION ONBROADBAND NETWORKING

SUBMITTED BY:-

•DEEPALI SHUKLA•MASHARRAT ASHFAQUE•YUVRAJ BHUWAL•ASHISH KUMAR PATEL•ARSHAD ALI

BSNL VOCATIONAL TRAININGBATCH 3 SESSION 2013

WHAT IS BROADBAND ?

• 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.

BROADBAND TECHNOLOGIES

WIRELESS

3G MOBILE

Wi-Fi (Wireless Fidelity)

Wi Max

LMDS & MMDS

FSO (Free Space Optics)

Satellite

DSL (DIGITAL SUBSCRIBER LINE))

• ADSL (Asymmetric DSL)

• VDSL (Very high Speed DSL)• HDSL (High Data Rate DSL)

• SDSL (Symmetric DSL)

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

ADSL• Frequency plan for 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

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

LANconnection.• 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.

BROADBAND COMPONENTS

• CPE (Customer Premises Equipment)

MODEMA 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 (DIGITAL SUBSCRIBER LINE ACCESS MULTIPLEXER)

• 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)

LAN SWITCHES

• 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 provide Gigabit Ethernet (GE) and Fast Ethernet (FE) interfaces for connecting network elements such as BRAS, DSLAMS etc.

• Tier1 switches are GB aggression switches to which BRAS and Tier2 are connected through GE/FE interfaces.

• DSLAMS are aggravated to Tier2 switches through FE interfaces except 480 ports DSLAM are aggravated through GE interfaces.

FUNCTIONS OF 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

BRAS (BROAD BAND REMOTE ACCESS SERVER)

• Termination of DSL customer.

• Allotment of IP address.

• Bandwidth control using rate limiting.

• Activation of an edge router for terminating VPN traffic.

• Protocols :- OSPF, DGP, THR, BGP, LDP

• Supports lawful interceptions and monitoring.

RADIUS

• AAA Function (Authentication, Authorization, Accounting)

• SSSS (Subscriber Service Selection System)

• RADIUS Is in conjugation with BRAS.

CORE NETWORK INTERFACES

CORE ROUTER

BRAS

TIER1

SWITCH

TIER2

SWITCH

DSLAM

ADSL

SPLITTER

PHONE

SYSTEM

• THANK YOU