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MODEMS(5)		    BSD	File Formats Manual		     MODEMS(5)

NAME
     modems -- modem configuration data	base

DESCRIPTION
     The modems	known by tip(1)	and their attributes are stored	in an ASCII
     file which	is structured somewhat like the	termcap(5) file.  Each line in
     the file provides a description for a single modem.  Fields are separated
     by	a colon	(``:'').  Lines	ending in a \ character	with an	immediately
     following newline are continued on	the next line.

     The first entry is	the name(s) of the modem.  If there is more than one
     name for a	modem, the names are separated by vertical bars.  After	the
     name of the modem comes the fields	of the description.  A field name fol-
     lowed by an `=' sign indicates a string value follows.  A field name fol-
     lowed by a	`#' sign indicates a following numeric value.

     When tip(1) is invoked, an	entry for a remote system is looked up in the
     /etc/remote database.  If the entry includes an "ACU" type	capability
     (abbreviated at), tip(1) looks up the specified modem in /etc/modems.  If
     a modem entry is found, the corresponding capabilities determine how
     tip(1) programs the modem when connecting to and disconnecting from the
     remote system.

CAPABILITIES
     Capabilities are either strings (str), numbers (num), or boolean flags
     (bool).  A	string capability is specified by capability=value; for	exam-
     ple, ``reset_command=ATZ\r''.  A numeric capability is specified by
     capability#value; for example, ``intercharacter_delay#50''.  A boolean
     capability	is specified by	simply listing the capability.

     dial_command	   (str) AT command used to dial remote	system (typi-
			   cally, "ATDT")

     echo_off_command	   (str) AT command to turn off	command	echo.

     escape_guard_time	   (num) The delay, expressed in milliseconds, used to
			   frame return-to-command escape sequences.

     escape_sequence	   (str) The return-to-command escape sequence.

     hangup_command	   (str) AT command used to hangup modem.

     hw_flow_control	   (bool) Enable hardware (RTS/CTS) flow control be-
			   tween computer and modem (DTE/DCE).

     init_string	   (str) AT command used to initialize modem before
			   dialing.

     intercharacter_delay  (num) Delay value, expressed	in milliseconds, be-
			   tween characters when sending commands to the mo-
			   dem.

     intercommand_delay	   (num) Minimum delay value, expressed	in millisec-
			   onds, to impose between commands issued to the mo-
			   dem.

     lock_baud		   (bool) Use a	fixed bit rate between the computer
			   and the modem (DTE /	DCE). The bit rate is speci-
			   fied	in /etc/remote.

     reset_command	   (str) AT command to reset the modem.

     reset_delay	   (num) The time, expressed in	milliseconds, required
			   by the modem	to complete a reset and	return to a
			   ready condition.

FILES
     /etc/modems  The modems configuration database file resides in /etc.

SEE ALSO
     tip(1), remote(5)

HISTORY
     The modems	file format appeared in	4.4BSD.

BSD				March 24, 1995				   BSD

NAME | DESCRIPTION | CAPABILITIES | FILES | SEE ALSO | HISTORY

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