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re: Details on AX.25 and APRS



   hi,,,,i believe it is a form of bell 202t modem signaling  1200/2200 Hz

    http://www.tapr.org/tapr/html/Fax25.html   english

   http://www.futesta.de/theorie/ax25linklayer.html   deutsche

   it seems that 1200/2200 is for VHF+  ,,not sure.

    hope this helps,,,,,,,,,,,have fun + take care.
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 |      \ \_ /  |__/   \__/  |       |      kg6pib @ cm97,,,,,,73
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