[aprssig] What is "TNC Channel Switching"?

Greg D ko6th.greg at gmail.com
Sat Apr 12 12:55:29 CDT 2014

Stephen H. Smith wrote:
> However, many users still use the command-line mode instead, since 
> many older TNCs don't support KISS.   (Particularly the MFJ 127x 
> series TNCs that crammed in numerous other modes, so that there wasn't 
> enough room in the 27256 eprom for KISS support.  I have replaced the 
> OEM firmware on countless MFJ 127x TNCs with the final release 
> "official" TAPR 1.1.9 firmware precisely to regain the KISS 
> capabilities.) 

Um, I have an MFJ 1278T TNC, and am running it in KISS mode under 
APRSIS/32.  Stock firmware on it, I believe, though I don't recall what 

Greg  KO6TH

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