credit card machines

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What information/data in held on the magnetic strip of a credit card?

For my it work i need to know exctaly what information if held on the magnetic strip on the back of a credit card, by this i mean the machine-readable information. i have googled t... More »

How do i know if my phone line is pstn or rs232?

I am installing a credit card machine at work - the instructions say to ensure its connected to a pstn line, never rs232. can i use the same socket as i use for the fax line?... More »

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