8 Appendix E: Simphony Payment Interface
The Simphony Payment Interface (SPI) is a standard set of messages that are exchanged between the Simphony Transaction System and Payment Service Providers (PSP). The purpose of the interface is to collect electronic payments in a way that keeps the transaction system free of Payment Card Industry (PCI) data. The messages themselves also do not contain PCI data, so wire transmission does not expose PCI data.
Oracle Food and Beverage recommends that configurations use a secure channel to communicate with PSPs. The level of security varies depending on the provider, so this should be a consideration when choosing a provider.