Modem is a one kind of communication processor

MODEM::

                     Modem is a one kind of communication processor or signal conveter which is connected with telephone,network, or computer.we can collect many  data,and also sell or buy something and send email or chating etc.

The work of modem;;

                     Generally modem work into two way;

1.     Modulation:-

                  in this case sender converted the digital signal to analog signal and send to the telephone line by the computer.

2.     De modulation:-

                  In this case receiver collect the analog signal from the telephone line and reagain receiver converted the analog signal to digital signal.

Classified of modem;;

·        Internal modem:-

            Internal modem connected with the pci slot of computer and a telephone  connected with a RJ45 connector in the computer.the speed of internal modem is 33KBPS or(36KBPS to 56 KBPS)

·        External modem:-

            External modem connected out side the cpu.it is connected with a ware in a serial port of motherboard and inbehind, a telephone connected with external modem.in this case a own power supply need for this modem.the speed of external modem is 33KBPS to KBPS. But other side we use a DSL broadband which is speed 2.0MBPS or more than.

IN this time to get a internet service, we use a plug and play usb modem like  micromax,tataforton which is interconnected with the ips sim card  like bsnl,airtel,Vodafone, aircel etc.