Talk:Busy line interrupt

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Phreaking

The blue box could cause an emergency breakthrough. I have no idea how to add a citation. I really don't think one is needed. Hacking operator functions was common in the 80s and 90s. — Preceding unsigned comment added by 67.70.83.201 (talk) 22:19, 9 December 2013 (UTC)[reply]

Talk:Busy line interrupt

Phreaking

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