% cd /bin
  % ls -1
  total 1464
  -rwxr-xr-x  2 root 32768 Oct 19  1988 STTY
  -rwxr-xr-x  2 root 5120  Oct 19  1988 [
  -rwxr-xr-x  1 root 45056 Oct 19  1988 adb
  lrwxr-xr-x  1 root   13  Aug 21 17:41 ar -> ../usr/bin/ar
  lrwxr-xr-x  1 root   13  Aug 21 17:41 as -> ../usr/bin/as
 <Ctrl/]>
   (characters not echoed)

  TELNET> SEND BRK

      This example does the following:

      o  Enters the UNIX ls command.

      o  Enters the TELNET escape sequence.

      o  Enters the TELNET SEND BRK command, which terminates
         execution of ls at the remote host.