Programmable Dial-Out Blocking Device

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< PIC Assembler, PIC Basic, PIC-C ~ Programmable Dial-Out Blocking Device

eric

Posted: Mon Aug 28, 2006 10:49 pm Post subject: Programmable Dial-Out Blocking Device

Site Admin Joined: 01 Jan 1970 Posts: 311

Programmable
Dial-Out Blocking
Device
barring premium rate numbers
Design by C. Lercher
Premium rate numbers (in the UK, generally those starting with 09) are
often used as a way of extracting payments from telephone users and
Internet surfers. This is however illegal if it is done covertly without the
knowledge of the user. The circuit described here blocks such numbers and
cannot be defeated.

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