Fly sky with modems

A guiding light that connects you to Web's wealth, a perfect assistant that allows your computer to attend telephone calls and receive faxes when you are not at home. But how does this small device allow you to do so much with so little ???? Read and know the magic behind the box called a modem

Modem stands fro MOdulator-DEModulator and as the name suggests is userd to convert or 'modulate' digital signals from the computer to analog for transmission over the telephone lines. The modem also converts the analog signals back to digital form, or demodulates them for the computer understand

TYPES OF MODEMS
INTERNAL MODEMS
EXTERNAL MODEMS
SOFTWARE MODEMS

An Internal Modem, looks like a printed circuit board. Like other PCB-based devices such as network interface cards, internal modem slips into a free slot within the PC. Because they plug directly into the computer's motherboard, internal modems are powered by the system's power supply. This protects them from power fluctuations. Moreover they come a bit cheap also

External Modems , on the other hand, have no such luxuries. And once you lose the modems external supply to power fluctuation, acquiring a replacement unit can be quite a problem. A possible advantage of an external modem is that you can manually reset the modem should the connection hang during operation. Moreover you can easily carry this device any where you want giving you the mobility

Of late, another type of modem has joined the race - the Software Modems. Increasing power of Microprocessors makes it possiboe to emulate a modem in memory. So instead of the modems processor doing all the digital to analog and analog to digital processing. it is PC's microprocessors that does all the work based on instructions provided from the software. Because it does not involve many hardware components like the modem chipset, software modems are relatively cheaper and faster, on the flip side they do consume lots of processing and computing power

VARIOUS STANDARDS TO LOOK FOR WHEN BUYING A MODEM