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.
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.
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.
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:
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
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.
This program and the isdnloop driver are ALPHA code. The main intention
for this driver is for testing the link level and applications.
© 1997 by Fritz Elfert <email@example.com>
isdnctrl(8), isdnloop(4), isdninfo(4), isdnctrl(4), ttyI(4).
isdn4k-utils-3.7 1999/09/06 LOOPCTRL(8)
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