19-07-2012, 10:59 AM
Internet Access via TV Cable Network
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INTRODUCTION
Internet data can be transferred through Cable networks wired to the user computer.
Accessing the Internet at 10 megabits per second.
A cable modem connects to a PC using the same coaxial cable that brings all channels to your
television.
India has a cable penetration of 80 million homes, offering a vast network for leveraging the internet access.
Cable Modem
A "Cable Modem" is a device that allows high-speed access to the Internet via a cable TV (CATV) network.
The cable modem attaches to computer through an Ethernet Network Interface Card.
It takes a signal from the computer and converts it for transmission over the cable network.
Isolation of TV & PC
At the connecting point the feeding of the data into the TV cable network.
The modem with an Ethernet interface.
They will be connected by means of a splitter at the system outlet of the subscriber.
The system uses the frequency range from 5 MHz until 30 MHz, which is not used from TV programs.
Advantages
Advanced High Speed Internet Access Service.
No new software is required.
No reconstruction of the cable system necessary.
Use Of free frequency range from 3 to 5 MHz without TV program reorganization.
Integration of the modem in the Billing System via router, accounting per space of time or volume possible.
Components and amplifiers must have only return path ability.
Disadvantages
Cable connections are not available in every neighbourhood,Because cable connections are ‘Always on,’ one needs a firewall and activation of other security features so as to protect the computer.