VISA and MASTER cards fall into "Magnetic cards" category, while telephone cards are chip based, and most of them are just memory cards, some are microprocessor cards as well.

The in-depth information you are looking for is generally confidential. However you may get some information on magnetic cards. The magnetic strip on these cards has 3 tracks, and many readers are availabale for both type of cards.

You may check CHIPDRIVE (for smart cards), and IDT for magnetic and bar coded cards. Both are good devices.

www.towitoko.com/readers.html
www.idt-net.com

The datasheet of telephone cards is only availabale from manufacturers under an NDA (Non Disclosure agreement). You may contact Infineon Technologies for further information.


Regards

IA