Normal TNC protocol is commonly called AX.25. The most common speed for satellite AX.25 is 1200 baud. Occasionally 9600 baud.
A quick look at the Amsat page list 6 satellites currently running ax.25 Castor, Stars, KKS-1, Oscar-66, Oscar-65, and ISS. There may be more, that was just a quick look.
I have had great luck with Kantronics, KPC-3 and KPC-9612. I even installed a KPC-9612 on board the Russian space station Mir. http://www.marexmg.org/marexmirweb/fileshtml/pmsupgrade.html
The KPC-9612 was also used in PC-Sat1 http://www.aprs.org/pcsat.html
ISS does have packet, unfortunately the software loaded in December 2003 enabled the criss-cross radio mode on the TM-D700. This mode caused a significant performance hit and has rendered Packet Mail virtually useless. And causes the Digi-repeater mode to have a 1-2 second delay and other issues.
http://www.marexmg.org/fileshtml/ISSPacketD700.html
WF1F www.marexmg.org
--- On Tue, 2/2/10, Sean Cavanaugh <seanc@unixgeeks..ca> wrote:
From: Sean Cavanaugh seanc@unixgeeks.ca Subject: [amsat-bb] Re: Recommended TNC To: amsat-bb@amsat.org Date: Tuesday, February 2, 2010, 1:37 PM On 02/02/2010 11:12 AM, Michael Wolthuis wrote:
Can anyone point me to the recommended TNC for adding
to an FT-847 for
digital satellite work? Are there special
modifications needed? What
connector does it use on the FT-847?
Thanks, Mike kb8zgl