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28 .\" @(#)modems.5 3/24/95
29 .\" $FreeBSD: src/usr.bin/tip/tip/modems.5,v 1.5.2.5 2001/08/16 13:17:07 ru Exp $
36 .Nd modem configuration data base
40 and their attributes are stored in an
43 is structured somewhat like the
45 file. Each line in the file provides a description for a single
47 Fields are separated by a colon (``:'').
48 Lines ending in a \e character with an immediately following newline are
49 continued on the next line.
51 The first entry is the name(s) of the modem. If there is more
52 than one name for a modem, the names are separated by vertical bars.
53 After the name of the modem comes the fields of the description. A
54 field name followed by an `=' sign indicates a string value follows. A field
55 name followed by a `#' sign indicates a following numeric value.
59 is invoked, an entry for a remote system is looked up in the
62 If the entry includes an "ACU" type capability (abbreviated at),
64 looks up the specified modem in
66 If a modem entry is found,
67 the corresponding capabilities determine how
69 programs the modem when connecting to and disconnecting from the
72 Capabilities are either strings (str), numbers (num), or boolean
73 flags (bool). A string capability is specified by
74 .Em capability Ns Ar = Ns Em value ;
75 for example, ``reset_command=ATZ\\r''. A numeric capability is specified by
76 .Em capability Ns Ar # Ns Em value ;
77 for example, ``intercharacter_delay#50''. A boolean capability is specified
78 by simply listing the capability.
79 .Bl -tag -width intercharacter_delay
82 AT command used to dial remote system (typically, "ATDT")
83 .It Cm \&echo_off_command
85 AT command to turn off command echo.
86 .It Cm \&escape_guard_time
88 The delay, expressed in milliseconds, used to frame return-to-command
90 .It Cm \&escape_sequence
92 The return-to-command escape sequence.
93 .It Cm \&hangup_command
95 AT command used to hangup modem.
96 .It Cm \&hw_flow_control
98 Enable hardware (RTS/CTS) flow control between computer and modem (DTE/DCE).
101 AT command used to initialize modem before dialing.
102 .It Cm \&intercharacter_delay
104 Delay value, expressed in milliseconds, between characters when sending commands
106 .It Cm \&intercommand_delay
108 Minimum delay value, expressed in milliseconds, to impose between commands
112 Use a fixed bit rate between the computer and the modem (DTE / DCE). The
113 bit rate is specified in
115 .It Cm \&reset_command
117 AT command to reset the modem.
120 The time, expressed in milliseconds, required by the modem to complete
121 a reset and return to a ready condition.
124 .Bl -tag -width /etc/modems -compact
128 configuration database file
138 file format appeared in