ct(1)							      General Commands Manual							     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 standard 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  specified
       time  has  elapsed.  Used for debugging.  Produces detailed information 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  min-
       utes  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
       system automatically issues the ct command to one or more specified terminals at certain designated times.

       The ct command is useful in the following situations: When a user working 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
       connection  should  be charged either to the local site, or to a specific account on the calling system.  If the remote user has the appro-
       priate 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 appropriate 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
       intervals until the specified time is exceeded.	The local user can override this default by specifying a time  with  the  -wnumber  option
       when entering the command.

NOTES

       In  order to establish a ct connection, the remote user generally contacts 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.  Initial 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)