From Newsgroup: alt.ham-radio.packet
"Phillip" <
usenet@notKG4IVDreal.com> wrote in message news:461ce7b1$0$19022$
4c368faf@roadrunner.com...
The hardest part for me was getting it to work with my radio; If I were
to set up a second packet station, I would get a radio that had a built
in TNC, like alinco's.
The TNCs built into radios generally aren't full TNCs, and are really only useable for APRS. You can expect them to work poorly or not at all with regular packet. As far as I can tell, all the manufacturers use the same, crippled, chipset, so Alinco, Kenwood, pretty much all the same.
I mainly use Mac OS X, or at times Windows XP, so the TNC would have to
be supported by Mac TNC software.
You need to ask what you want to do. A TNC-2 is useable with only a
terminal emulator, so it should be no issue even on a Mac. For most
anything else you are going to have trouble finding Mac software. Some of
the so-called packet software manipulates the terminal commands to a TNC-2,
so you will need to match the software to the particular brand of TNC-2. Although many TNC-2 commands are consistent (and are supposed to be!), each manufacturer has to add his "improvements", ensuring at least partial incompatibility with somebody else's software.
I think it's common to use KISS mode, which allows computer to completly generate the AX25 headers and body.
KISS mode is pretty popular with some of the smarter software, but as far as
I can tell, the smarter software is mostly Windoze or Linux (maybe you can recompile the Linux stuff for OS-X). If you are only interested in KISS
mode, a KISS mode only TNC like the TNC-X can be a very inexpensive alternative. But if you need full capability, you are either going to have
to find something at a hamfest (getting harder all the time) or pay the long dollar.
I would be careful about some of the less expensive TNCs however. Many are really APRS-only. The TNC-X seems to be an exception in that it is an
actual TNC, but KISS only and somewhat limited. But it at least does do regular packet, and it is a fraction of the price of a TNC-2.
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