CT(C)                                UNIX System V



     Name
          ct - spawn getty to a remote terminal


     Syntax
          ct [ -wn ] [ -xn ] [ -h ] [ -v ] [ -sspeed ] telno ...


     Description
          ct dials the telephone number of a modem that is attached to
          a  terminal,  and  spawns  a getty process to that terminal.
          Telno is a telephone number, with equal signs for  secondary
          dial tones and minus signs for delays at appropriate places.
          The set of legal characters for telno is 0 thru 9, -, =,  *,
          and  #.  The maximum length telno is 58 characters.  If more
          than one telephone number is specified, ct will try each  in
          succession  until one answers; this is useful for specifying
          alternate dialing paths.

          ct  will  try   each   ACU   line   listed   in   the   file
          /usr/lib/uucp/Devices  until it finds an available line with
          appropriate attributes or runs out of entries.  If there are
          no free lines, ct will ask if it should wait for one, and if
          so, for how many minutes it should wait before it gives  up.
          ct  will  continue  to try to open the dialers at one-minute
          intervals until the specified limit is exceeded.  This value
          can  also  be  set on the command line by specifying the -wn
          option, where n is the maximum number of minutes that ct  is
          to wait for a line.

          The -xn  option  is  used  for  debugging.   It  produces  a
          detailed  output  of  the  program execution on stderr.  The
          debugging level, n, is a single digit; -x9 produces the most
          detailed  output.   If the -v option is used, ct will send a
          running narrative to the standard error output stream.

          Normally, ct will hang up the current line, so the line  can
          answer  the  incoming call.  The -h option will prevent this
          action.  The -h option will also wait for the termination of
          the  specified  ct  process  before returning control to the
          user's terminal.

          The data rate may be set with the -s option, where speed  is
          expressed in baud.  The default rate is 1200.

          After the user on the  destination  terminal  logs  out,  ct
          prompts, Reconnect?  If the response does not begin with the
          letter y, the line will be dropped; otherwise, getty will be
          started again and the login:  prompt will be printed.

          To log out properly, the user must type control D.

          Of course, the destination terminal must be  attached  to  a
          modem that can answer the telephone.


     Files
          /usr/lib/uucp/Devices
          /usr/lib/uucp/LCK..(tty-device)
          /usr/adm/ctlog


     See Also
          cu(C), login(M), uucp(C), getty(M)


     Notes
          In hangup mode (-h not specified), when  a  suitable  dialer
          has  been  allocated, ct prompts ``Proceed to hang-up?''  If
          the response does not begin with the letter y,  the  program
          simply  exits.  If you are logged in on a computer through a
          local terminal and you want to connect a remote terminal  to
          the  computer,  you  should  use nohup with ct to accomplish
          this:

               nohup ct -h -sspeed phone

          After the command is executed, a login prompt  is  displayed
          on  the  remote terminal.  The user can then log in and work
          on the computer just as on a local terminal.


     (printed 2/15/90)                                      CT(C)