Hacking Question:
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Do Blue Boxes still work?
Answer:
Blue Boxes still work in areas using in-band signalling. Modern phone
signalling switches using ESS (Electronic Signalling Systems) use
out-of-band-signalling. Nothing you send over the voice portion of
bandwidth can control the switch.
signalling switches using ESS (Electronic Signalling Systems) use
out-of-band-signalling. Nothing you send over the voice portion of
bandwidth can control the switch.
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