node(8) - Node front end for AX.25, NET/ROM, Rose and TCP 
-c            Enable  compression.  With  this  option it is assumed that the incoming call is using Zlib
              based compression (modified Lempel-Ziv 1977).  Currently no  negotiation  is  done  so  the
              caller must be aware of this. You probably want to set up a separate AX.25, NET/ROM or ROSE
              callsign in ax25d.conf or a separate  TCP  port  in  inetd.conf  to  listen  to  compressed
              connects.