WORKING OF ATM

            When we run short of money we usually go to atm center. But have we ever thought how this magnificent   atm machine works? But answer from most of us is no. The atm is controlled by a host server which controls and co-ordinates the whole transaction process. The host server keep track of the transaction that are done.

WORKING OF ATM(AUTOMATED TELLER MACHINE):

                             The atm machine consists of an atm card reader in which the credit or debit cardar inserted to. The card consists of a coat of a magnetic material and outer plastic covering .The details of the card holder are stored in the card in the form of a magnet strip. When the debit or credit card are inserted into the atm this machine identifies the user and it sends a requesting the password. When the password is entered correctly the atm connects itself with the host. When the amount is entered the information is converted into electronic signals and send the signal to the  again and connect it with the bank data base and then in return the bank sends the information about the transaction, then the host sends this to the atm.

These connections are classified into two major types, that is Leased-line ATM and Dial-up ATM. Both the types use a telephone connection to get connected to the host processor. However, the Leased-line uses a dedicated, point to point telephone connection in order to get connected to the host processor, making it very costly to set it up and maintain it throughout the year. However, Dial-up ATM use an ordinary telephone connection to get connected to the user. Hence, Dial-up ATM is very easy to set up and the maintenance costs are also less compared to Leased-line.

                The atm consists of a sensor that checks the length and the thickness of the currency and differentiates as 100,500 and 1000that come from the safe. The damaged and folded currency are sent to separate section in which the note are placed. Then the notes are sent to the dispenser where the cash could be drawn. The numbers of notes are counted by the special sensors that goes to the dispenser.