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MODEMS(5)                DragonFly 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
     followed by an `=' sign indicates a string value follows.  A field name
     followed 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
     example, ``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
                           (typically, "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
                           between computer and modem (DTE/DCE).

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

     intercharacter_delay  (num) Delay value, expressed in milliseconds,
                           between characters when sending commands to the
                           modem.

     intercommand_delay    (num) Minimum delay value, expressed in
                           milliseconds, to impose between commands issued to
                           the modem.

     lock_baud             (bool) Use a fixed bit rate between the computer
                           and the modem (DTE / DCE). The bit rate is
                           specified 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.

DragonFly 4.1                   March 24, 1995                   DragonFly 4.1

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