cui(4) · carta

NAME

ttyI, cui - ISDN character devices

DESCRIPTION

ttyIx and cuix are the character devices of the isdn4linux ISND driver package. They can be used in the same way as the traditional serial devices ttySx and cuax. The official major device numbers are 43 for ttyI and 44 for cui. The minor device numbers start with 0 and end with 63.

The ISDN devices provide a modem emulation with a set of traditional and some special AT commands. This provides easy use together with almost all communication software that uses modem commands: minicom (1), seyon (1), XCept (1), uucico (8) (Taylor UUCP), mgetty (8), dip (8), pppd (8) and more.

The line disciplines are handled by the kernel so that SLIP, CSLIP and asynchronous PPP are possible.

The port speed of the ttyIx and cuix devices is always 64000 bps.

AT COMMAND SET

The following AT commands are supported by ttyIx and cuix.

ATA: Answer an incoming call.

ATD <num>: Dial number <num>. Allowed are digits [0-9] and the characters ",", "#", ".", "*", "W", "P", "T", "S", "-". The characters are ignored except of "S" which indicates a SPV if it preceedes the number (only German 1TR6 ISDN).

ATE0: Echo off.

ATE1: Echo on (default).

ATH: Hang up.

ATH0: Hang up.

ATH1: Off hook (ignored).

ATI: Return device Information ("ISDN for Linux...").

ATI0: Return device Information ("ISDN for Linux...").

ATI1: Return device Information ("ISDN for Linux...").

ATO: Return from command mode to online mode (data mode).

ATQ0: Enable result codes (default).

ATQ1: Disable result codes.

ATSx=y: Set register x to value y.

ATSx?: Show content of register x.

ATV0: Print result code as number.

ATV1: Print result code as text (default).

ATZ: Reset all registers and load profile values.

AT&Bx: Set packet size of outgoing packets to value x (maximum 4000). The actual packet size depends on the hardware driver and may be smaller than the given value x (e.g. with the teles driver). There will be no error message if the value is bigger than the hardware driver can process. However the size of the outgoing packets will be set correctly.

AT&D2: DTR falling edge: hang up and return to command mode (default).

AT&D3: DTR falling edge: hang up, return to command mode and reset all registers.

AT&Ex: Set MSN (Euro-ISDN, E-DSS1) or EAZ (German 1TR6) to value x. For MSNs set x to the whole MSN, for EAZ's x should be only the last digit of the Number.

AT&F: Set all registers and profile to "factory-defaults".

AT&V: Show all settings.

AT&W0: Write registers and EAZ/MSN to profile. (You need to run iprofd (8) for making changes permanent.)

AT&Xx: Enable (x=1) or disable (x=0) BTX-Mode.

ESCAPE SEQUENCE

During a connection the driver can be set to command mode while typing in The escape character (default "+") may be set via register 2. The delay must be at least 1.5 seconds, between each escape character the pause must not exceed 0.5 seconds.

ATO brings the modem emulation back to data mode.

REGISTERS

0: Number of rings on which the "modem" will answer. (S0=0 will disable auto answering). (Default 0).

1: Counts and stores the number of rings from an incoming call.

2: ASCII code of the escape character. (Default 43 = "+").

3: ASCII code of Carriage Return (Default 13 = CR).

4: ASCII code of Line Feed (Default 10 = LF).

5: ASCII code of Backspace (Default 8 = BS).

6: Duration, in number of seconds, modem waits before dialing. (Default 3).

7: Wait time for carrier in seconds (ignored, default 60).

8: Pause time for comma (,) in dial command in seconds (ignored, default 2).

9: Carrier detect time in tenths of seconds (ignored, default 6).

10: Wait time until hangup after carrier loss in tenths of seconds (ignored, default 7).

11: Duration and delay in milliseconds for touch tone dialing (ignored, default 70).

12

Bit-mapped register (default 69)
Bit

Description 0

0 = Suppress response messages.
1 = Show response messages. 1

0 = Response messages as text.
1 = Numeric response messages. 2

0 = Echo off.
1 = Echo on. 3

0 = DCD always on.
1 = DCD follows carrier. 4

0 = CTS follows RTS.
1 = Ignore RTS, CTS always on. 5

0 = Low-edge on DTR: Hangup and return to command mode.
1 = Same as 0 but also resets all registers. 6

0 = DSR always on.
1 = DSR on only if channel is available. 7

0 = Cisco-PPP-flag-hack off (default).
1 = Cisco-PPP-flag-hack on.

13

Bit-mapped register (default 0)
Bit

Description 0

0 = Use delayed sending of data.
1 = Immediately send data. 1

0 = T.70 protocol off.
1 = T.70 protocol on.

14: Layer-2 protocol
0 = X75/LAPB with I-frames (default)
1 = X75/LAPB with UI-frames
2 = X75/LAPB with BUI-frames
3 = HDLC

15: Layer-3 protocol 0 = transparent (default)

16: Outgoing packet size / 16 (default 250).

17: reserved.

18: Service-Octet-1.

19: Service-Octet-2.

BUGS

This man page is not complete.

AUTHOR

Volker Goetz <[email protected]>