ATM Network

A Standard ATM Network consist of some element which that element connected together from node at the ATM until Host at data center of Bank. Every element have function on each other. Picture bellow is a standard or a simple network at a bank for ilustration.

From picture above , we can see each element on the network atm.

• ATM-C (atm controller)
Every ATM on network will be Connected to the ATM-C via a cloude of networking. Every transaction and message fully controlled by this element, and how transaction will be process, depend on this ATM-C. for messaging system between ATM and ATM-C can use protcocl such, NDC, DDC,ISO8583 or Properitry. Once ATM-C use NDC for protocol, all atm under Atm-c should use that protocol too.

• Security Module
This device have function to decrypt pin block which sent from atm on a transaction request. Security module will be decide the pin block is valid or not, and will inform the atm about this.

• Card management and pin mailer system.
In this element, all account record and including pin block, card number, expired date of customer stored on database. The atm-c will verified the card number in this element. If record exist then atm-cp will check pin block on security module. If not atm-c will sent command to the Atm to returning card to customer and displayed on the screen information the card is invalid.
Another is, pin mailer system. this element have function to produce a new card of customer. Usually card management system and pin mailer system connect direct to security module, so if pin mailer produce a card, automatic generate a new pin for that new card.


Some ATM-C integrated with gateway to make connection with the host data center at a bank or to other gateway another bank, connect to other network provider such VISA or MASTER. Commonly connection for gateway using ISO 8583.