A terminal node controller (TNC) is a device used by amateur radio operators to participate in AX.25 packet radio networks. It is similar in function to the Packet Assembler/Disassemblers used on X.25 networks, with the addition of a modem to convert baseband digital signals to audio tones.
The TNC was originally developed by Doug Lockhart, VE7APU, of Vancouver, British Columbia, and popularized by the Tucson Amateur Packet Radio association with the TNC-1 and TNC-2.
Read more about Terminal Node Controller: Description, Current Status, TNC/Radio Data Ports
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