left, male rp-tnc connector 2.4ghz antenna. right, standard male tnc connector on uhf antenna.
reverse-polarity tnc (rp-tnc, rtnc) variation of tnc specification reverses polarity of interface. achieved incorporating female contacts found in jacks plug, , male contacts found in plugs jack.
because not readily available, rp-tnc connectors have been used wi-fi equipment manufacturers comply specific local regulations, such fcc, designed prevent consumers connecting antennas exhibit gain , therefore breach compliance. fcc considered rp-tnc acceptable in preventing consumers changing antenna; 2000 regarded them readily available, though delaying ruling indefinitely. of 2013, leading manufacturers still using rp-tnc connectors on wi-fi equipment.
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