"HSBC's international network comprises over 9,500 offices in 76 countries and territories across the world".
However it turns out that nobody actually knows how their online payment processing service works.
Their system uses a local client program to encode the credit card information before it is sent to their payment server. The programs are sent as precompiled binaries, however I could not get the Linux versions to run properly on any of our servers.
Here's the response to my request for assistance.
"Our system is not tested on Fedora Core version of Linux. So, I am not sure whether it would work or not.
Unfortunately, we do not have any technical contact who can help you with this. "
So I guess that's that.
