[aprssig] What is "TNC Channel Switching"?

Andrew Pavlin AndrewEMT at hotmail.com
Fri Apr 11 08:23:21 CDT 2014

Greetings, all.

I was slogging through the APRS spec, and came upon a mention that the ASCII characters '|' and '~' were reserved for TNC channel switching, and couldn't appear in any messages or even as a symbol code.

What does this mean, and is it still applicable? Will I break the APRS-IS or some ancient TNC somewhere if I send those characters in an APRS message?

Just curious.

Andrew Pavlin, KA2DDO
Sent from my Verizon Wireless BlackBerry

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