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Ideally, I would connect a VeriFone terminal to the Internet via an Ethernet cable and transmit transaction data in real time, but I also want to program the terminal to be able to work in offline mode and save transaction data to a file to transmit later. Is this possible?

I would also like to know how much of the communication is with the processing host vs the merchant services provider's application.

David
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sun
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    This is more detailed [than your last question today](http://stackoverflow.com/q/8985703/255756), but IMHO still off-topic. – Linus Kleen Jan 24 '12 at 11:29

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Yes, you can but you will need a SDK for that and what goes on or offline depends on your needs. On a Vx510 device you have access to file system, LAN, dial-up or gprs communication, keyboard, printer, display and a lot more.

Moisés Guimarães
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