% <Ctrl/Z>  (characters not echoed)
  TELNET> enable debug <Return>
  TELNET> display <Return>
     .
     .
     .
  Will print network data flow in hexadecimal
  .
  .
  .
  TELNET>)resume <Return>
  SEND [   0] D A
  RCVD [   0] D A
  RCVD [   0] 746E7069782E6C6B672E6465632E636F6D3E20
  % ls <Return>
  SEND [   0] 6C
  RCVD [   0] 6C l
  SEND [   0] 73
  RCVD [   0] 73 s
  SEND [   0] D A
  RCVD [   0] D A
  RCVD [   0] 62696E20202020202020...
  RCVD [  32] 7074 D A
  french.estud.oiseau     russian.estud.ptitsa     fences
  typescript     verio
  %

      Escapes from a session with a UNIX host, enables debug mode,
      resumes the session, and asks for a list of files in the
      working directory. Both hexadecimal data and readable data
      are displayed.