loopctrl



LOOPCTRL(8)               Linux System Administration              LOOPCTRL(8)




NAME

       loopctrl - configure isdnloop ISDN driver


SYNOPSIS

       loopctrl [-d Driver-Id] action options ...


DESCRIPTION

       loopctrl is used to setup the isdnloop ISDN driver.



OPTIONS

       -d Driver-Id
              selects the virtual S0 interface named by Driver-Id.  Driver-Ids
              are defined during driver initialisation. See isdnloop(4) for  a
              description  of  the syntax to be used for modularised and mono-
              lithic driver versions.  This option must be  used  to  identify
              the  virtual S0 interface if more than one S0 interface is exis-
              tent. If a single virtual S0 interface is used, it may be  omit-
              ted.  If using more than one virtual card, support for the other
              cards is enabled with the add action of loopctrl.  Ids  may  not
              start with digits or small x, because these values are misinter-
              preted as numeric parameters by insmod.  For loading the module,
              always the newest modutils package should be used to avoid prob-
              lems during load.

       The following actions may be given to loopctrl.

       add [id]
              enables support for an additional virtual card in the driver. If
              id  is missing, adds a card with an id given by the system. with
              id given, adds a card with an Id given  by  the  user.  Ids  are
              checked  against  conflicts, and if a conflict happens, replaced
              by the system in the same manner as if no Id was supplied.

       leased on|off
              switches between normal (dialup) and leased-line  mode.  Leased-
              line  mode  is  intended  for usage with S64K-lines or - if both
              channels are used - for S02. These lines do not have  a  D-chan-
              nel.  When  leased-line  mode  is  enabled, the driver simulates
              incoming calls using special  "phone-numbers"  for  calling  and
              called address which are generated as follows:

              Calling number:
                     LEASEDx
                             where  x  is  the  internal slot-number of the S0
                             interface. This number  starts  with  0  for  the
                             first  S0 interface and is incremented by one for
                             every  S0  interface  configured  using  the  add
                             action.

              Called number:
                     x
                             where  x  is  equal  to the channel number of the
                             calling S0 interface starting with 1.

       start protocol phone1 [phone2 phone3]
              starts the driver with the given D-channel protocol. If protocol
              is 1tr6, only phone1 has to be given. It is meant to be the base
              number of the virtual S0 interface to which the EAZ is appended.
              If  protocol is dss1, phone1, phone2 and phone3 have to be given
              and represent the three MSNs of the virtual S0 interface.

       dump   is available if the program is configured  using  the  --enable-
              dump  option  only. The contents of internal driver variables is
              dumped on stdout.


BUGS

       This program and the isdnloop driver are ALPHA code. The main intention
       for this driver is for testing the link level and applications.


AUTHOR

       © 1997 by Fritz Elfert <fritz@isdn4linux.de>



SEE ALSO

       isdnctrl(8), isdnloop(4), isdninfo(4), isdnctrl(4), ttyI(4).



isdn4k-utils-3.7                  1999/09/06                       LOOPCTRL(8)

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