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"RT-TNC" stands for "Reverse-Thread TNC". RT-TNC Connectors [1] are
the cousins of TNC-Connectors [2], and provide identical performance.
Reverse-Thread connectors differ only by the direction of the
threading of the outer 'ground' contact used to hold connectors
together. In RT-TNCs [3], the thread is "left-handed", and therefore
to create a connection you lock the connector in a counter-clockwise
direction instead of the normal clockwise direction.
Reverse-Thread connectors are used on 802.11 [4] gear due to
America's FCC [5] requirements (Part 15.203) where by such equipment
needs non-standard connectors. A much more common TNC [6] solution to
satisfy the FCC [7] requirements is to use "reversed-polarity [8]".
Links:
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[1] http://melbournewireless.org.au/?RTTNCConnector
[2] http://melbournewireless.org.au/?TNCConnector
[3] http://melbournewireless.org.au/?RTTNCConnector
[4] http://melbournewireless.org.au/?802.11
[5] http://melbournewireless.org.au/?FCC
[6] http://melbournewireless.org.au/?TNCConnector
[7] http://melbournewireless.org.au/?FCC
[8] http://melbournewireless.org.au/?RPTNCConnector
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