KPC 9612+ and kissattach

["Ian McLaughlin" <ian@platinum.net>]

Hello All,
  I have searched the archives, but cannot find a solution to my problem.

2 machines trying to talk to each other.  One seems to work, one doesn't.

Software config the same on each one - RedHat 7.3 with the ax25 libs and
utils installed.  Kernel recompiled to support ax25 and kiss devices.

The machine that works is using a Kenwood D7A radio at 9600 baud in kiss
mode.  kissattach seems to work, and if I ping the other end of the radio
link, I get the radio going in to transmit mode in sync with the ping
packets.

The other end, however is a different story.  It's a Kantronics KPC 9612+,
with no radio on the first port, and a 9600 baud radio on the second port.
Minicom works fine, and I can connect to the tnc and send and receive data
on the TNC.  My problem appears to be with mkiss.  Am I correct in assuming
that I need to run mkiss because the KPC 9612 is a dual-port TNC?  I am
running the foillowing commands:

mkiss -s 9600 /dev/ttyS0 /dev/ptyq0 /dev/ptyq1
kissattach /dev/ttyq1 RADIO 172.16.0.2

The commands are accepted, and a network device is create, but if I ping, I
get no radio traffic at all.

I am suspecting that I need to do something fancy before I go in to kiss
mode on the TNC.  At the moment, I'm just doing a mycall followed by intface
kiss.  Should I do something else?

Any help is greatly appreciated.  I've spent all week trying to figure this
one out!