PacketRadio on 27mc with Linux

This page will describe how to setup packetradio on 27mc on Linux. It is work in progress: I'm actually learning how to this, so initially it will not be complete. Any feedback is welcome!
Oh, I'm expecting a BayCom modem here, but if you're using something else, most of the other things will also apply.

If you have a DNT Formel I

...then the schematics of this device can be found here: dnt_f1.jpg.

If you have a Alan RMD 1200 modem

...and you have a manual, please contact me! I'm desperately looking for the pin-layout of this modem!
Layout of the cable:
Blue       - MIC AF (audio)
Shielding  - GND (mass)
Brown      - RX AF (RX audio)
White      - PTT (TX)

Files you need

The AX25 tools: http://sourceforge.net/project/showfiles.php?group_id=24545.

Configuring the kernel

Start menuconfig in the usual way.
The following will appear:
linux kernel configuration screen
Scroll down to 'Amateur Radio Support' and press enter.
The following menu will appear, in here select the entries that I also selected.
linux kernel configuration screen
In here select the entries that I also selected.
linux kernel configuration screen
Now build & install the kernel.

Setting things up

When your system has booted up with the new kernel, insmod the driver for the baycom modem (modprobe baycom_ser_hdx).
The following modules should be now loaded:
Module                  Size  Used by
baycom_ser_hdx          6816   0
hdlcdrv                 7424   4  [baycom_ser_hdx]
ax25                   35712   0  [hdlcdrv]



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February 11, 2003