prepared by :- himanshu minz vikas upadhyay vocational training at bsnl,durg batch 4 session 2014
TRANSCRIPT
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