This is the AX.25 kit for Linux 1.1.20 or higher. It will _NOT_ work with any prior release as the address passing system has changed in this kernel. This directory contains ax25krnl.tgz : The kernel changes. You also need to uncomment the CONFIG_AX25 (and possibly CONFIG_PI2) options in config.in as well as installing these files. This contains support for the Ottowa PI/PI2 cards as well as KISS TNC support. There are also dumb 8530 based drivers for Linux available (eg for the USCC cards). These however contain material that cannot be placed under the GPL and are therefore of questionable legality. These drivers are intentionally NOT contained, nor tested. ax25user.tgz : Latest user tool set. This creates the sources and manual pages. Unpack from / and do cd /usr/local/ax25 mkdir bin pms pms/bin cd src make install Manual page installation varies between Linux distributions. To use the PMS you will need to alter pms.c before building to suit your system. Its more of an example to persuade someone to write a decent version than a real PMS - but it does work.