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
	      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 single virtual S0 interface is used, it  may  be
	      omitted.	 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 mis-
	      interpreted as numeric parameters by insmod.  For	 loading  the
	      module,  always  the  newest modutils 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	 sup-
	      plied.

       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 proto-
	      col 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  inten-
       tion for this driver is for testing the link level and applications.

AUTHOR
       (C) 1997 by Fritz Elfert 


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



isdn4k-utils-3.3		  1999/09/06			  LOOPCTRL(8)

UNIX/Linux commands referenced on this page:

1. setup
2. more
3. card
4. as
5. id
6. which
7. col
8. dump
9. link