Cigarra writes "There was much public debate going on during the last several months here in Paraguay, regarding the 'liberation of Internet,' that is, the lifting of the restriction on ISPs to connect directly to international carriers. Up until this week, they were forced to hire wholesale service from the State run telco, Copaco. During the last month, when the new regulation was almost ready, the real reason supporting the monopoly made it to the headlines: Copaco would fight for the monopoly, fearing VoIP based telephony. Finally, the regulator Conatel resolved today to end the monopoly, but a ruling on VoIP legal status was postponed for 'further study.' I guess this kind of 'problem' arose almost everywhere else in the world, so I ask the international slashdotters crowd: what is VoIP's legal status in your country / state / region? How well did incumbent telcos adapt to it, and overall, just how disruptive was this technology to established operators?"
We warn the reader in advance that the proof presented here depends on a
clever but highly unmotivated trick.
-- Howard Anton, "Elementary Linear Algebra"