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  GigaSet 307x Device Driver
  ==========================
  
  1.   Requirements
       ------------
  1.1. Hardware
       --------
       This driver supports the connection of the Gigaset 307x/417x family of
       ISDN DECT bases via Gigaset M101 Data, Gigaset M105 Data or direct USB
       connection. The following devices are reported to be compatible:
  
       Bases:
          Siemens Gigaset 3070/3075 isdn
          Siemens Gigaset 4170/4175 isdn
          Siemens Gigaset SX205/255
          Siemens Gigaset SX353
          T-Com Sinus 45 [AB] isdn
          T-Com Sinus 721X[A] [SE]
          Vox Chicago 390 ISDN (KPN Telecom)
  
       RS232 data boxes:
          Siemens Gigaset M101 Data
          T-Com Sinus 45 Data 1
  
       USB data boxes:
          Siemens Gigaset M105 Data
          Siemens Gigaset USB Adapter DECT
          T-Com Sinus 45 Data 2
          T-Com Sinus 721 data
          Chicago 390 USB (KPN)
  
       See also http://www.erbze.info/sinus_gigaset.htm and
                http://gigaset307x.sourceforge.net/
  
       We had also reports from users of Gigaset M105 who could use the drivers
       with SX 100 and CX 100 ISDN bases (only in unimodem mode, see section 2.5.)
       If you have another device that works with our driver, please let us know.
  
       Chances of getting an USB device to work are good if the output of
          lsusb
       at the command line contains one of the following:
          ID 0681:0001
          ID 0681:0002
          ID 0681:0009
          ID 0681:0021
          ID 0681:0022
  
  1.2. Software
       --------
       The driver works with the Kernel CAPI subsystem as well as the old
       ISDN4Linux subsystem, so it can be used with any software which is able
       to use CAPI 2.0 or ISDN4Linux for ISDN connections (voice or data).
  
       There are some user space tools available at
       http://sourceforge.net/projects/gigaset307x/
       which provide access to additional device specific functions like SMS,
       phonebook or call journal.
  
  
  2.   How to use the driver
       ---------------------
  2.1. Modules
       -------
       For the devices to work, the proper kernel modules have to be loaded.
       This normally happens automatically when the system detects the USB
       device (base, M105) or when the line discipline is attached (M101). It
       can also be triggered manually using the modprobe(8) command, for example
       for troubleshooting or to pass module parameters.
  
       The module ser_gigaset provides a serial line discipline N_GIGASET_M101
       which uses the regular serial port driver to access the device, and must
       therefore be attached to the serial device to which the M101 is connected.
       The ldattach(8) command (included in util-linux-ng release 2.14 or later)
       can be used for that purpose, for example:
  	ldattach GIGASET_M101 /dev/ttyS1
       This will open the device file, attach the line discipline to it, and
       then sleep in the background, keeping the device open so that the line
       discipline remains active. To deactivate it, kill the daemon, for example
       with
  	killall ldattach
       before disconnecting the device. To have this happen automatically at
       system startup/shutdown on an LSB compatible system, create and activate
       an appropriate LSB startup script /etc/init.d/gigaset. (The init name
       'gigaset' is officially assigned to this project by LANANA.)
       Alternatively, just add the 'ldattach' command line to /etc/rc.local.
  
       The modules accept the following parameters:
  
  	Module	 	Parameter  Meaning
  
  	gigaset	 	debug	   debug level (see section 3.2.)
  
  			startmode  initial operation mode (see section 2.5.):
  	bas_gigaset )		   1=ISDN4linux/CAPI (default), 0=Unimodem
  	ser_gigaset )
  	usb_gigaset )	cidmode    initial Call-ID mode setting (see section
  				   2.5.): 1=on (default), 0=off
  
       Depending on your distribution you may want to create a separate module
       configuration file like /etc/modprobe.d/gigaset.conf for these.
  
  2.2. Device nodes for user space programs
       ------------------------------------
       The device can be accessed from user space (eg. by the user space tools
       mentioned in 1.2.) through the device nodes:
  
       - /dev/ttyGS0 for M101 (RS232 data boxes)
       - /dev/ttyGU0 for M105 (USB data boxes)
       - /dev/ttyGB0 for the base driver (direct USB connection)
  
       If you connect more than one device of a type, they will get consecutive
       device nodes, eg. /dev/ttyGU1 for a second M105.
  
       You can also set a "default device" for the user space tools to use when
       no device node is given as parameter, by creating a symlink /dev/ttyG to
       one of them, eg.:
  
  	ln -s /dev/ttyGB0 /dev/ttyG
  
       The devices accept the following device specific ioctl calls
       (defined in gigaset_dev.h):
  
       ioctl(int fd, GIGASET_REDIR, int *cmd);
       If cmd==1, the device is set to be controlled exclusively through the
       character device node; access from the ISDN subsystem is blocked.
       If cmd==0, the device is set to be used from the ISDN subsystem and does
       not communicate through the character device node.
  
       ioctl(int fd, GIGASET_CONFIG, int *cmd);
       (ser_gigaset and usb_gigaset only)
       If cmd==1, the device is set to adapter configuration mode where commands
       are interpreted by the M10x DECT adapter itself instead of being
       forwarded to the base station. In this mode, the device accepts the
       commands described in Siemens document "AT-Kommando Alignment M10x Data"
       for setting the operation mode, associating with a base station and
       querying parameters like field strengh and signal quality.
       Note that there is no ioctl command for leaving adapter configuration
       mode and returning to regular operation. In order to leave adapter
       configuration mode, write the command ATO to the device.
  
       ioctl(int fd, GIGASET_BRKCHARS, unsigned char brkchars[6]);
       (usb_gigaset only)
       Set the break characters on an M105's internal serial adapter to the six
       bytes stored in brkchars[]. Unused bytes should be set to zero.
  
       ioctl(int fd, GIGASET_VERSION, unsigned version[4]);
       Retrieve version information from the driver. version[0] must be set to
       one of:
       - GIGVER_DRIVER: retrieve driver version
       - GIGVER_COMPAT: retrieve interface compatibility version
       - GIGVER_FWBASE: retrieve the firmware version of the base
       Upon return, version[] is filled with the requested version information.
  
  2.3. CAPI
       ----
       If the driver is compiled with CAPI support (kernel configuration option
       GIGASET_CAPI) the devices will show up as CAPI controllers as soon as the
       corresponding driver module is loaded, and can then be used with CAPI 2.0
       kernel and user space applications. For user space access, the module
       capi.ko must be loaded.
  
       Legacy ISDN4Linux applications are supported via the capidrv
       compatibility driver. The kernel module capidrv.ko must be loaded
       explicitly with the command
          modprobe capidrv
       if needed, and cannot be unloaded again without unloading the driver
       first. (These are limitations of capidrv.)
  
       Most distributions handle loading and unloading of the various CAPI
       modules automatically via the command capiinit(1) from the capi4k-utils
       package or a similar mechanism. Note that capiinit(1) cannot unload the
       Gigaset drivers because it doesn't support more than one module per
       driver.
  
  2.4. ISDN4Linux
       ----------
       If the driver is compiled without CAPI support (native ISDN4Linux
       variant), it registers the device with the legacy ISDN4Linux subsystem
       after loading the module. It can then be used with ISDN4Linux
       applications only. Most distributions provide some configuration utility
       for setting up that subsystem. Otherwise you can use some HOWTOs like
           http://www.linuxhaven.de/dlhp/HOWTO/DE-ISDN-HOWTO-5.html
  
  
  2.5. Unimodem mode
       -------------
       In this mode the device works like a modem connected to a serial port
       (the /dev/ttyGU0, ... mentioned above) which understands the commands
  
           ATZ                 init, reset
               => OK or ERROR
           ATD
           ATDT                dial
               => OK, CONNECT,
                  BUSY,
                  NO DIAL TONE,
                  NO CARRIER,
                  NO ANSWER
           <pause>+++<pause>   change to command mode when connected
           ATH                 hangup
  
       You can use some configuration tool of your distribution to configure this
       "modem" or configure pppd/wvdial manually. There are some example ppp
       configuration files and chat scripts in the gigaset-VERSION/ppp directory
       in the driver packages from http://sourceforge.net/projects/gigaset307x/.
       Please note that the USB drivers are not able to change the state of the
       control lines. This means you must use "Stupid Mode" if you are using
       wvdial or you should use the nocrtscts option of pppd.
       You must also assure that the ppp_async module is loaded with the parameter
       flag_time=0. You can do this e.g. by adding a line like
  
          options ppp_async flag_time=0
  
       to an appropriate module configuration file, like
       /etc/modprobe.d/gigaset.conf.
  
       Unimodem mode is needed for making some devices [e.g. SX100] work which
       do not support the regular Gigaset command set. If debug output (see
       section 3.2.) shows something like this when dialing:
           CMD Received: ERROR
           Available Params: 0
           Connection State: 0, Response: -1
           gigaset_process_response: resp_code -1 in ConState 0 !
           Timeout occurred
       then switching to unimodem mode may help.
  
       If you have installed the command line tool gigacontr, you can enter
       unimodem mode using
           gigacontr --mode unimodem
       You can switch back using
           gigacontr --mode isdn
  
       You can also put the driver directly into Unimodem mode when it's loaded,
       by passing the module parameter startmode=0 to the hardware specific
       module, e.g.
  	modprobe usb_gigaset startmode=0
       or by adding a line like
  	options usb_gigaset startmode=0
       to an appropriate module configuration file, like
       /etc/modprobe.d/gigaset.conf
  
  2.6. Call-ID (CID) mode
       ------------------
       Call-IDs are numbers used to tag commands to, and responses from, the
       Gigaset base in order to support the simultaneous handling of multiple
       ISDN calls. Their use can be enabled ("CID mode") or disabled ("Unimodem
       mode"). Without Call-IDs (in Unimodem mode), only a very limited set of
       functions is available. It allows outgoing data connections only, but
       does not signal incoming calls or other base events.
  
       DECT cordless data devices (M10x) permanently occupy the cordless
       connection to the base while Call-IDs are activated. As the Gigaset
       bases only support one DECT data connection at a time, this prevents
       other DECT cordless data devices from accessing the base.
  
       During active operation, the driver switches to the necessary mode
       automatically. However, for the reasons above, the mode chosen when
       the device is not in use (idle) can be selected by the user.
       - If you want to receive incoming calls, you can use the default
         settings (CID mode).
       - If you have several DECT data devices (M10x) which you want to use
         in turn, select Unimodem mode by passing the parameter "cidmode=0" to
         the appropriate driver module (ser_gigaset or usb_gigaset).
  
       If you want both of these at once, you are out of luck.
  
       You can also use the tty class parameter "cidmode" of the device to
       change its CID mode while the driver is loaded, eg.
          echo 0 > /sys/class/tty/ttyGU0/cidmode
  
  2.7. Dialing Numbers
       ---------------
       The called party number provided by an application for dialing out must
       be a public network number according to the local dialing plan, without
       any dial prefix for getting an outside line.
  
       Internal calls can be made by providing an internal extension number
       prefixed with "**" (two asterisks) as the called party number. So to dial
       eg. the first registered DECT handset, give "**11" as the called party
       number. Dialing "***" (three asterisks) calls all extensions
       simultaneously (global call).
  
       This holds for both CAPI 2.0 and ISDN4Linux applications. Unimodem mode
       does not support internal calls.
  
  2.8. Unregistered Wireless Devices (M101/M105)
       -----------------------------------------
       The main purpose of the ser_gigaset and usb_gigaset drivers is to allow
       the M101 and M105 wireless devices to be used as ISDN devices for ISDN
       connections through a Gigaset base. Therefore they assume that the device
       is registered to a DECT base.
  
       If the M101/M105 device is not registered to a base, initialization of
       the device fails, and a corresponding error message is logged by the
       driver. In that situation, a restricted set of functions is available
       which includes, in particular, those necessary for registering the device
       to a base or for switching it between Fixed Part and Portable Part
       modes. See the gigacontr(8) manpage for details.
  
  3.   Troubleshooting
       ---------------
  3.1. Solutions to frequently reported problems
       -----------------------------------------
       Problem:
          You have a slow provider and isdn4linux gives up dialing too early.
       Solution:
          Load the isdn module using the dialtimeout option. You can do this e.g.
          by adding a line like
  
             options isdn dialtimeout=15
  
          to /etc/modprobe.d/gigaset.conf or a similar file.
  
       Problem:
          The isdnlog program emits error messages or just doesn't work.
       Solution:
          Isdnlog supports only the HiSax driver. Do not attempt to use it with
  	other drivers such as Gigaset.
  
       Problem:
          You have two or more DECT data adapters (M101/M105) and only the
          first one you turn on works.
       Solution:
          Select Unimodem mode for all DECT data adapters. (see section 2.5.)
  
       Problem:
  	Messages like this:
  	    usb_gigaset 3-2:1.0: Could not initialize the device.
  	appear in your syslog.
       Solution:
  	Check whether your M10x wireless device is correctly registered to the
  	Gigaset base. (see section 2.7.)
  
  3.2. Telling the driver to provide more information
       ----------------------------------------------
       Building the driver with the "Gigaset debugging" kernel configuration
       option (CONFIG_GIGASET_DEBUG) gives it the ability to produce additional
       information useful for debugging.
  
       You can control the amount of debugging information the driver produces by
       writing an appropriate value to /sys/module/gigaset/parameters/debug, e.g.
          echo 0 > /sys/module/gigaset/parameters/debug
       switches off debugging output completely,
          echo 0x302020 > /sys/module/gigaset/parameters/debug
       enables a reasonable set of debugging output messages. These values are
       bit patterns where every bit controls a certain type of debugging output.
       See the constants DEBUG_* in the source file gigaset.h for details.
  
       The initial value can be set using the debug parameter when loading the
       module "gigaset", e.g. by adding a line
          options gigaset debug=0
       to your module configuration file, eg. /etc/modprobe.d/gigaset.conf
  
       Generated debugging information can be found
       - as output of the command
           dmesg
       - in system log files written by your syslog daemon, usually
         in /var/log/, e.g. /var/log/messages.
  
  3.3. Reporting problems and bugs
       ---------------------------
       If you can't solve problems with the driver on your own, feel free to
       use one of the forums, bug trackers, or mailing lists on
           http://sourceforge.net/projects/gigaset307x
       or write an electronic mail to the maintainers.
  
       Try to provide as much information as possible, such as
       - distribution
       - kernel version (uname -r)
       - gcc version (gcc --version)
       - hardware architecture (uname -m, ...)
       - type and firmware version of your device (base and wireless module,
         if any)
       - output of "lsusb -v" (if using an USB device)
       - error messages
       - relevant system log messages (it would help if you activate debug
         output as described in 3.2.)
  
       For help with general configuration problems not specific to our driver,
       such as isdn4linux and network configuration issues, please refer to the
       appropriate forums and newsgroups.
  
  3.4. Reporting problem solutions
       ---------------------------
       If you solved a problem with our drivers, wrote startup scripts for your
       distribution, ... feel free to contact us (using one of the places
       mentioned in 3.3.). We'd like to add scripts, hints, documentation
       to the driver and/or the project web page.
  
  
  4.   Links, other software
       ---------------------
       - Sourceforge project developing this driver and associated tools
           http://sourceforge.net/projects/gigaset307x
       - Yahoo! Group on the Siemens Gigaset family of devices
           http://de.groups.yahoo.com/group/Siemens-Gigaset
       - Siemens Gigaset/T-Sinus compatibility table
           http://www.erbze.info/sinus_gigaset.htm
  
  
  5.   Credits
       -------
       Thanks to
  
       Karsten Keil
          for his help with isdn4linux
       Deti Fliegl
          for his base driver code
       Dennis Dietrich
          for his kernel 2.6 patches
       Andreas Rummel
          for his work and logs to get unimodem mode working
       Andreas Degert
          for his logs and patches to get cx 100 working
       Dietrich Feist
          for his generous donation of one M105 and two M101 cordless adapters
       Christoph Schweers
          for his generous donation of a M34 device
  
       and all the other people who sent logs and other information.