Visa, MasterCard, Amex
Switch with the standard ISO8583 based package
POS devices, network
various POS protocols, fixed message or ISO0503 based
ATM devices, network
depending on the device handler, NCR, NDC, Diebold
Clearing and settlement
simple fixed formats configurable, as well as XML or JSON
PSP, aggregators
usually via some form of ISO8583 implementation, easy to
configure
e-commerce gateways
they usually send some implementation of ISO8583
e-commerce APIs
standard HTTP web service with XML or JSON data
mobile commerce, networks
networks usually come via ISO8583, while devices may send any API
form
telephone, mail
simplified ISO8583 or customized messages, SQL to database checks
international, SWIFT, ISO20022
standard SWIFT or custom inter-bank, payments, clearing, cash