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LOOPCTRL(8)			   Linux System Administration			      LOOPCTRL(8)

       loopctrl - configure isdnloop ISDN driver

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

       loopctrl is used to setup the isdnloop ISDN driver.

       -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 monolithic driver versions.	This option must be used to iden-
	      tify the virtual S0 interface if more than one S0 interface is existent. If a  sin-
	      gle  virtual  S0 interface is used, it may be omitted.  If using more than one vir-
	      tual 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 misinterpreted
	      as numeric parameters by insmod.	For loading the module, always the  newest  modu-
	      tils package should be used to avoid problems 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-channel. When leased-line mode is enabled, the driver simulates incom-
	      ing  calls  using  special "phone-numbers" for calling and called address which are
	      generated as follows:

	      Calling number:
			    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:
			    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  inter-
	      face  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.

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

       (C) 1997 by Fritz Elfert <fritz@isdn4linux.de>

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

isdn4k-utils-3.1pre4			    1999/09/06				      LOOPCTRL(8)
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