ct man page on Tru64

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ct(1)									 ct(1)

NAME
       ct - Dials an attached terminal and issues a login process

SYNOPSIS
       ct [-hv] [-sspeed] [-wnumber] [-xnumber] telephone_number

       The  ct command enables a user on a remote terminal to communicate with
       the Tru64 UNIX operating system over a telephone	 line  attached	 to  a
       modem at each end of the connection.

OPTIONS
       Prevents	 ct  from  hanging  up	the current line to answer an incoming
       call.  Sets the data rate  where	 speed	is  expressed  in  baud.   The
       default	is  1200 baud.	Allows ct to send a running narrative to stan‐
       dard error output.  Specifies number as the maximum number  of  minutes
       that ct is to wait for a line.  The command then dials the remote modem
       at 1-minute intervals until the connection is established or the speci‐
       fied time has elapsed.  Used for debugging.  Produces detailed informa‐
       tion about the command's execution on  standard	error  output  on  the
       local  system. The debugging level, number, is a single digit between 0
       and 9.  The recommended default is 9.  Specifies the  telephone	number
       of  the	modem  attached	 to the remote terminal.  telephone_number can
       include the digits 0 - 9, -  (dashes)  representing  delays,  =	(equal
       signs)  representing secondary dial tones, * (asterisks), and # (number
       signs). The phone number can contain a maximum of 31 characters.

DESCRIPTION
       Once ct establishes a connection, a user on the remote terminal can log
       in and work on the system.

       A  user	on  the	 local system issues ct with the appropriate telephone
       number to call the modem attached to the remote terminal. When the con‐
       nection	is  established, ct issues a login prompt that is displayed on
       the remote terminal.  A user on the remote terminal enters  a  username
       at  the prompt, and the operating system opens a new shell.  The person
       using the remote terminal then proceeds to work on the  system  like  a
       local user.

       However,	 if there are no free lines, the ct command displays a message
       to that effect and asks if the local user wants to wait	for  one.   If
       the  reply  is no, the ct command hangs up.  If the local user wants to
       wait for a free line, the ct command prompts for the number of  minutes
       to  wait.   The	ct  command  continues	to  dial  the remote system at
       1-minute intervals until the connection is  established	or  until  the
       specified amount of time has elapsed.

       In  order  to  establish	 a ct connection, the remote user contacts the
       local user with a regular telephone call and asks  the  local  user  to
       issue  the ct command.  However, if such connections occur regularly at
       your site, your system manager might prefer that a specified local sys‐
       tem automatically issues the ct command to one or more specified termi‐
       nals at certain designated times.

       The ct command is useful in the following situations: When a user work‐
       ing  offsite  needs  to	communicate with a local system under strictly
       supervised conditions.  Because the local system	 contacts  the	remote
       terminal, the remote user does not need to know the telephone number of
       the local system. Additionally, the local user issuing the  ct  command
       can  monitor the work of the remote user.  When the cost of the connec‐
       tion should be charged either to the  local  site,  or  to  a  specific
       account	on the calling system.	If the remote user has the appropriate
       access permission and can make outgoing calls on	 the  attached	modem,
       that  user  can make the equivalent of a collect call.  The remote user
       calls the specified local system, logs in, and issues the phone	number
       of  the	remote terminal without the -h option.	The local system hangs
       up the initial link so that the remote terminal is free for an incoming
       call, and then calls back to the modem attached to the remote terminal.

       After  the  user	 logs  out, ct prompts the user on the remote terminal
       with a reconnect option; the system can	either	display	 a  new	 login
       prompt or drop the line.

       The  ct command is not as flexible as the cu command.  For example, you
       cannot issue system commands on the local system while connected	 to  a
       remote  system  via ct.	However, the ct command does have two features
       not available with cu: You can instruct	ct  to	continue  dialing  the
       specified number until the connection is established or a set amount of
       time has elapsed.  You can specify more than one telephone number at  a
       time  to	 instruct ct to continue dialing each modem until a connection
       is established over one of the lines.

       If you specify alternate dialing paths by entering more than one number
       on   the	  command   line,   ct	 tries	 each	line   listed  in  the
       /usr/lib/uucp/Devices file until it finds an available line with appro‐
       priate attributes, or runs out of entries.  If there are no free lines,
       ct asks if it should wait for one, and if so,  for  how	many  minutes.
       The  ct command continues to try to open the dialers at 1-minute inter‐
       vals until the specified time is exceeded.  The local user can override
       this  default by specifying a time with the -wnumber option when enter‐
       ing the command.

NOTES
       In order to establish a ct connection, the remote user  generally  con‐
       tacts  a local user (with a regular phone call) and asks the local user
       to issue the command.  Before issuing the ct command, be	 certain  that
       the  remote  terminal  is attached to a modem that can answer the tele‐
       phone.

EXAMPLES
       To connect to a	modem  with  an	 internal  number  4-1589  (the	 -  is
       optional), enter: ct 41589

	      The  system  responds:  Allocated	 dialer	 at  1200 baud Confirm
	      hang_up? (y to hang_up) To dial a modem, with a local  telephone
	      number,  attached to a remote terminal (dialing 9 for an outside
	      line and	specifying  a  3-minute	 wait  time),  enter:  ct  -w3
	      9=5551212 To dial a modem, with a long-distance number, attached
	      to a remote terminal (specifying an outside  line	 and  a	 five-
	      minute wait), enter: ct -w5 9=15555551212

FILES
       Information about available devices.  Dialing code abbreviations.  Ini‐
       tial handshaking on  a  link.   Access  permission  codes.   Accessible
       remote systems.

SEE ALSO
       Commands:  cu(1),  login(1),  tip(1), uucico(8), uucleanup(8), uucp(1),
       uuencode(1), uulog(1),  uuname(1),  uupick(1),  uusched(8),  uusend(1),
       uustat(1), uuto(1), uux(1)

									 ct(1)
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