Obtain and read the AX25-HOWTO:
ftp:/sunsite.unc.edu/pub/Linux/docs/HOWTO/AX25-HOWTO/
Using the AX25-HOWTO set up the normal Amateur Radio ax.25 and Netrom system and make certain it is operating properly. When the software "CALL" can be used to make either a ax25 or Netrom connection to a distant node, the system is ready to change to one using node listings like the BPQ Switch.