25-04-2012, 04:06 PM
BROADBAND ACCESS TECHNOLOGY
adsl.pptx (Size: 460.65 KB / Downloads: 42)
INTRODUCTION:BROADBAND ACCESS TECHNOLOGIES
BSNL is the largest telecom service provider in India..
Broadband refers to telecommunication that provides multiple channels of data over a single communications medium, using some form of frequency or wave division multiplexing. It is a telecommunications signal of greater bandwidth.
COMPONENTS EXPLANATION
ADSL Filter/Splitter Separates the analogue voice (phone) traffic from data (ADSL) traffic.
The ADSL modem uses a combination of several advanced signal processing techniques to achieve the required throughput speeds
The Public Switched Telephone Network (PSTN) is the network of the world's public circuit-switched telephone networks.
ATM provides data link layer services that run over OSI Layer 1 physical links.ATM is a connection-orientated technique
The ISP usually provides other services like mail and news servers, and may cache frequently-used pages from the Internet so that you can access them more quickly.
The DSLAM is the piece of equipment at your local exchange that is at the other end of your ADSL connection. It houses a bank of ADSL modems on one side and has a single fiber-optic data connection on the other.
ADVANTAGES OF ADSL:
DSL is Always On, 24 hrs A Day.
Data security
Cost Effective
It does not require the use of a second phone line.
Fast download speeds
It can be installed on demand, unlike fiber cabling, which requires substantial underground work.
No dial up is needed as the connection is always on.
There are some disadvantages with ADSL: Distance-sensitive, Slower upload speeds, Phone line required
Conclusion:
ADSL promises to be the technology for the new millennium, enjoying enormous popularity from both service providers and their customers. The future looks bright for ADSL. While yesterday's obstacles and negative predictions fade away, many are watching ADSL with renewed interest. The "need for speed" is increasing, and the ADSL industry is working hard to make sure that broadband ADSL continues to be the global choice.