I am pretty sure that most if not all processors would have a system similar and it would seem to be the easiest solution for small merchants like us to satisfy the PCI compliance requirements, Since no collection of CC information would be done by us and it would all be handled by the processors servers. The cart would only have to pass the Order # and Total amount to be billed, but can pass more if desired.
******** First Data Global Gateway Connect *************
Securely Collect Order Data
Global Gateway Connect has the flexibility to collect as little or as much order data as merchants need, safely and securely.
If merchants don't have a secure web server for collecting sensitive information, Global Gateway Connect can collect the secure payment information for them. How much information we collect and what fields your merchants include on their order form(s) depends on the payment mode they select: PayOnly, PayPlus, or FullPay.