431 lines
9.0 KiB
Groff
431 lines
9.0 KiB
Groff
.\" Process this file with
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.\" groff -man -Tascii ttyI.4 for ASCII output, or
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.\" groff -man -Tps ttyI.4 for PostScript output
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.\"
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.TH ttyi 4 "January 2002" "ISDN 4 Linux @I4LVERSION@" "Special files"
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.SH NAME
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ttyI \- ISDN character devices with modem emulator
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.SH DESCRIPTION
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.IB ttyI [ 0-63 ]
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are emulated tty devices of the Linux
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.SM ISDN
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subsystem.
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These devices can be used in the same way as the traditional serial
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devices
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.IR ttySx.
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The official major device numbers are
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.B 43
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for
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.I ttyI .
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The minor device numbers start with
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.B 0
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and end with
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.BR 63 .
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The
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.SM ISDN
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tty devices are equipped with a modem emulation implementing a set of
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traditional and some special AT commands. This provides easy use
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together with almost all communication software that uses modem
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commands:
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.BR minicom (1),
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.BR seyon (1),
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.BR XCept (1),
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.BR uucico (8),
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.BR mgetty (8),
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.BR dip (8),
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.BR pppd (8)
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and more. When enabled during kernel configuration, the emulator
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is capable of a reduced set of commands to support audio. To use
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audio features, an
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.SM ISDN
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card with a audio-capable low-level driver is needed. Currently
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the only audio-capable drivers are the teles and HiSax driver.
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The line disciplines are handled by the kernel so that SLIP,
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CSLIP and asynchronous PPP are possible.
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The port speed of the
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.SM ISDN
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tty devices is always 64000 bps.
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.SH AT COMMAND SET
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The description of
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.B AT commands
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here does
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.B not
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cover audio related commands. For a description of audio related commands,
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see
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.BR isdn_audio (4).
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The following
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.B AT commands
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are supported by
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.SM ISDN
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tty devices:
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.TP
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.B ATA
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Answer an incoming call.
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.TP
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.BI ATD num
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.RI "Dial number " num .
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Allowed are digits [0-9] and the characters
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",", "#", ".", "*", "W", "P", "T", "S", "-". The characters are
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ignored except of "S" which indicates a SPV if it precedes the
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number
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.RB ( only
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German 1TR6 ISDN).
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.TP
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.B ATE0
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Echo off.
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.TP
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.B ATE1
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Echo on (default).
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.TP
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.B ATH
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Hang up.
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.TP
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.B ATH0
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Hang up.
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.TP
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.B ATH1
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Off hook (ignored).
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.TP
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.B ATI
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Return device Information ("ISDN for Linux...").
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.TP
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.B ATI0
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Return device Information ("ISDN for Linux...").
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.TP
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.B ATI1
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Return device Information ("ISDN for Linux...").
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.TP
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.B ATI2
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Return Statistics of last connection.
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.TP
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.B ATO
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Return from command mode to online mode (data mode).
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.TP
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.B ATQ0
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Enable result codes (default).
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.TP
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.B ATQ1
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Disable result codes.
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.TP
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.BI ATS x = y
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.RI "Set register " x " to value " y .
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.TP
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.BI ATS x ?
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.RI "Show content of register " x .
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.TP
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.BI ATS x . y = z
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.RI "Set register " x ", bit " y " to value " z
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.TP
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.BI ATS x . y ?
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.RI "Show bit " y " of register " x .
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.TP
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.B ATV0
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Print result code as number.
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.TP
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.B ATV1
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Print result code as text (default).
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.TP
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.B ATZ
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Reset all registers and load profile values.
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.TP
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.BI AT&B x
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Set packet size of outgoing packets to value
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.I x
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(maximum 4000). The actual packet size depends on the hardware
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driver and may be smaller than
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.I x
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(e.g. with the teles driver). There will be
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.B no
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error message if the value is bigger than the hardware driver
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can process. However the size of the outgoing packets will be
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set correctly.
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.TP
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.B AT&D2
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DTR falling edge: hang up and return to command mode (default).
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.TP
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.B AT&D3
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DTR falling edge: hang up, return to command mode and reset all
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registers.
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.TP
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.BI AT&E x
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Set MSN (Euro-ISDN, EDSS1) or EAZ (German 1TR6) to value
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.IR x .
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For MSNs,
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.I x
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is a string of digits representing the local phone number, while for EAZs
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.I x
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should be only the last digit of the Number.
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.TP
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.B AT&F
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Set all registers and profile to "factory-defaults".
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.TP
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.BI AT&L plist
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Set list of phone numbers to listen on.
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.I plist
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is a list of wildcard patterns separated by semicolon. If this is
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set, it has precedence over the MSN set by AT&E.
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.TP
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.B AT&V
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Show current register settings.
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.TP
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.B AT&W0
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Write registers and EAZ/MSN to profile. (You need to run
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.BR iprofd (8)
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for making changes permanent.)
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.TP
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.B AT&X0
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Disable BTX-Mode (default).
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.TP
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.B AT&X1
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Enable BTX-Mode.
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.SH ESCAPE SEQUENCE
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During a data connection, the driver can be set to command mode by
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typing in
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.IB delay +++ delay\c
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.RB .
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The escape character (default "+") may be set via register 2. The
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.I delay
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must be at least 1.5 seconds and between each escape
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character the pause must not exceed 0.5 seconds.
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.I
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ATO
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brings the modem emulation back to data mode.
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.SH REGISTERS
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.TP
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.BR 0 " (default 0)"
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Number of rings on which the "modem" will answer. (S0=0 will
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disable auto answering).
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.TP
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.BR 1 " (default 0)"
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Counts and stores the number of rings from an incoming call.
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.TP
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.BR 2 " (default 43 = '+')"
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ASCII code of the escape character.
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.TP
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.BR 3 " (default 13 = CR)"
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ASCII code of Carriage Return.
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.TP
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.BR 4 " (default 10 = LF)"
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ASCII code of Line Feed.
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.TP
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.BR 5 " (default 8 = BS)"
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ASCII code of Backspace.
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.TP
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.BR 6 " (default 3)"
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Duration, in number of seconds, modem waits before dialling.
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.TP
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.BR 7 " (default 60)"
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Wait time for carrier in seconds.
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.TP
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.BR 8 " (default 2)"
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Pause time for comma (',') in dial command in seconds (ignored).
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.TP
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.BR 9 " (default 6)"
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Carrier detect time in tenths of seconds (ignored).
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.TP
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.BR 10 " (default 7)"
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Wait time until hangup after carrier loss in tenths of seconds
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(ignored).
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.TP
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.BR 11 " (default 70)
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Duration and delay in milliseconds for touch tone dialling
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(ignored).
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.TP
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.BR 12 " (default 69)
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Bit-mapped register.
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.br
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Bit Description
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.br
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0 0 = Suppress response messages.
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.br
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1 = Show response messages.
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.br
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1 0 = Response messages as text.
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.br
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1 = Numeric response messages.
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.br
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2 0 = Echo off.
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.br
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1 = Echo on.
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.br
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3 0 = DCD always on.
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.br
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1 = DCD follows carrier.
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.br
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4 0 = CTS follows RTS.
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.br
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1 = Ignore RTS, CTS always on.
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.br
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5 0 = Low-edge on DTR: Hangup and return
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.br
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to command mode.
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.br
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1 = Same as 0 but also resets all
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.br
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registers.
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.br
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6 0 = DSR always on.
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.br
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1 = DSR on only if channel is available.
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.br
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7 0 = Cisco-PPP-flag-hack off.
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.br
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1 = Cisco-PPP-flag-hack on.
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.TP
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.BR 13 " (default 4)"
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Bit-mapped register.
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.br
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Bit Description
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.br
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0 0 = Use delayed sending of data.
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.br
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1 = Immediately send data.
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.br
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1 0 = T.70 protocol off.
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.br
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1 = T.70 protocol on.
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.br
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2 0 = Don't hangup on DTR low.
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.br
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1 = Hangup on DTR low.
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.br
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3 0 = Standard response messages.
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.br
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1 = Extended response messages.
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.br
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4 0 = CALLER NUMBER before every RING.
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.br
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1 = CALLER NUMBER after first RING.
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.br
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5 0 = Disable extended T.70 protocol.
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.br
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1 = Enable extended T.70 protocol.
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.br
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6 0 = Disable RUNG message.
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.br
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1 = RUNG on cancelled incoming call.
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.br
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7 0 = Disable display messages from net.
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.br
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1 = Enable disable messages from net.
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.TP
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.BR 14 " (default 0)
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Layer-2 protocol.
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.br
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0 = X75/LAPB with I-frames.
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.br
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1 = X75/LAPB with UI-frames.
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.br
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2 = X75/LAPB with BUI-frames.
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.br
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3 = HDLC.
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.br
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4 = TRANSPARENT.
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.br
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10 = Analog Modem. (only if hardware supports this)
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.br
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11 = Fax G3. (only if hardware supports this)
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.TP
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.BR 15 " (default 0)"
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Layer-3 protocol.
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.br
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0 = transparent
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.br
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1 = transparent with audio features (e.g. DSP)
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.br
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2 = Fax G3
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.TP
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.BR 16 " (default 250)"
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Outgoing packet size / 16.
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.TP
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.B 17
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reserved.
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.TP
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.BR 18 " (default 4)"
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Service-Octet-1 to accept or to be used on dial out.
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.br
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Bit-mapped register.
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.br
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Bit Description
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.br
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0 Service 1 (audio) when set.
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.br
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1 Service 5 (BTX) when set.
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.br
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2 Service 7 (data) when set.
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.br
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.RS
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.HP
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Note:
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It is possible to set more than one bit. In this case, on outgoing
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calls, the most significant 1-bit is chosen to select the outgoing
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service octet. On incoming calls the selected services are accepted,
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contents of register 14 is ignored and the Layer-2-protocol is
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automatically set with the following values to match the service
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of the incoming call:
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.RS
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.TP
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.RI "Incoming service " audio " (Reg. 20.0 = 1)"
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L2-protocol is set to 4 (TRANSPARENT).
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.TP
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.RI "Incoming service " BTX " (Reg. 20.1 = 1)"
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L2-protocol is set to 0 (X75/LAPB with I-frames).
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.TP
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.RI "Incoming service " date " (Reg. 20.2 = 1)"
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L2-protocol is set to 0 (X75/LAPB with I-frames).
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.RE
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.RE
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.TP
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.BR 19 " (default 0)"
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Service-Octet-2 (ignored when using EDSS1).
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.TP
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.BR 20 " (read only)"
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Service-Octet-1 of last incoming call. This bit-mapped register is set
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on incoming call (during RING). Mapping is the same like register 18.
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.TP
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.BR 21 " (read only)"
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Bit-mapped register. Set on incoming call (during RING) to the
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value of octet 3 of calling party number Information Element (Numbering plan).
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See section
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.BR 4.5.10 " of " "ITU Q.931" .
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.TP
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.BR 22 " (read only)"
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Bit-mapped register. Set on incoming call (during RING) to the
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value of octet 3a of calling party number Information Element (Screening info).
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See section
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.BR 4.5.10 " of " "ITU Q.931" .
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.TP
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.BR 23 " (default 0)"
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Bit-mapped register.
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.br
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Bit Description
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.br
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0 0 = Disable CPN extended RING.
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.br
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1 = Enable CPN extended RING.
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.br
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1 0 = Disable CPN extended FCON.
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.br
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1 = Enable CPN extended FCON.
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.TP
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.SH NOTE
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There used also be
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.I cui
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devices (major device number 44), but since the
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.I cua
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devices for regular tty devices are no longer supported in the kernel,
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these are also no longer supported for ISDN4linux.
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.SH AUTHOR
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Fritz Elfert <fritz@isdn4linux.de>
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.br
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modified by Paul Slootman <paul@isdn4linux.de>
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.SH SEE ALSO
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.BR icnctrl "(8), " telesctrl "(8), " isdninfo "(4), " isdn_audio "(4), "
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.BR isdnctrl (8).
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