isdnlog(8) Linux System Administration isdnlog(8)
isdnlog - isdn log system (and more)
Isdnlog gets information from your isdn card, decodes this information,
and can do anything with it, such as logging, starting programs, and
more. All options to isdnlog can be given as command line flags, or you
can specify a file with options (recommended).
Isdnlog only works with the HiSax isdn driver. Other cards with their
own driver are not supported. Additionally you need to enable d-channel
logging (you can use "hisaxctrl <DriverId> 1 4" to do that, e.g.
"hisaxctrl line0 1 4"). Isdnlog can only log outgoing calls that origi-
nate from your isdn card, and incoming calls. To get information about
outgoing calls from other isdn devices (e.g. telephones), you need a
second Teles isdn card, with crossed lines. Such a card is not usable
for communicating, but can log outgoing calls from any device (see dual
-V show version information and exit.
-fFILE read options from the config file FILE. This file is also
called the parameter file of isdnlog. The first line should be
"[options]". You may use blank lines and comments (starting with
a #). All config files for isdnlog have the format described in
isdn.conf(5). Debug options must be given on the command line,
they cannot be stored in a file.
isdnlog will read from this device and from /dev/isdninfo. You
should give /dev/isdnctrl0 for the first isdn card (or /dev/isd-
nctrl2 for the second).
Isdnlog has a replay mode for debugging, where you can simulate
previous recorded events. In that case use "-" instead of a
Set digits necessary to get an outside line, when connected
through a PABX. You can give several codes padded with a ":"
(There is no commandline option for this.) Overwrite area code
from isdn.conf. A machine connected to subscriber lines with
different area codes and thus several isdnlogs running requires
this non global setting.
Set the provider preselection to the given value. More prefixes
may be separated by a ":".
Values are e.g. "010" for DE, "10" for AT, "16:17" for NL, "9"
Set the preselected (i.e the provider choosen, if no prefix is
dialed) provider to value. Value should be without vbn.
(There is no commandline option for this.) Ignore certain
providers from the rate-file. The format of skiplist is the
same as for Q: tags in rate.conf and described in rate.conf(5).
Suppress leading digits. If isdnlog is connected through a PABX,
it is sometimes not possible to let isdnlog distinguish between
a national and an international call, even with help of the -A
This option requires two values separated with ":" as an argu-
ment. These values tell isdnlog how many leading digits to
remove from incoming and outgoing calls respectively. If only
one value is given, it is used for both incoming and outgoing
Don’t use this in combination with the -A option! This will con-
fuse the system (and possibly you).
Example: a PABX in Germany shows the number of an incoming call
from Hamburg as "00040...". When calling out to Hamburg, it
shows the number as "0040...". This means that on incoming
calls, three zeroes must be removed, and on outgoing calls two
zeroes must be removed (the number must be normalized to be
without any leading zeroes in the case of a national number;
international numbers must have one leading zero). So, in this
case, the option -03:2 would be correct.
Telefon number shorter then value are considered to be internal
numbers on your PABX.
Normally "causes" (e.g. "non-selected user clearing") for other
connected ISDN devices are not displayed, only those which are
related to the connection will be shown. With this option the
causes for the other devices are also displayed.
Ignore "housekeeping" frames. x may be 1 (ignore RR=Receiver
ready) or 2 (ignore EMP=Euracom Management Protokoll) frames.
Ignore COLP/CLIP frames when value is 1 or greater. Value 0 is
default, and tells isdnlog to not ignore COLP/CLIP frames. With
value 2 the ignored COLP/CLIP number is displayed.
The first value applies to COLP the second to CLIP. If only one
value is given, it applies to COLP and CLIP.
Sometimes the COLP number is a number in a different areacode to
the number that was dialled, and then the cost calculation would
(There is no commandline option for this.) A PABX may cause
numerous messages like "Unexpected discriminator 0x47 --
ignored!" resulting from protocol discriminator values in layer
3 not known to isdnlog. Set ignoreUPD to yes to suppress this
Enable dual mode. You need this if you have a second isdn card
attached with crossed lines so it can listen to what other isdn
devices like telephones are doing. With x=2 you can increase the
debug output - every single digit will be displayed.
Some setups may require workarounds for reliable logging. These
workarounds are enabled by addition of the following numbers to
the dual value. They are intended for the dualmode but may also
be useful without. In this case, specify only the sum of the
following numbers without 1 or 2 for the dual mode.
0x100 Enable this when the destination number of an outgoing
call contains the number of the previous call, e.g. call-
ing 222 after calling 111 before results in 111222 for
the second call.
This may also help in situations where an unanswered
incoming call causes incorrect logging of the following
0x200 Enable this when outgoing calls are logged without a
source number (own MSN).
0x400 Enable this when unanswered incoming calls are logged
multiple times (revealed by isdnrep -E).
-1 A HFC-based card is used for echo mode. Enable echo mode for the
HFC card with
hisaxctrl id 10 1
hisaxctrl id 12 1
-r Replay a debug file (e.g. /tmp/isdnctrl0) to find bugs. With
this flag you should give a filename with the debug information
instead of a device. It will also work with files not created
by isdnlog (e.g. "cat /dev/isdnctrl0").
Display throughput messages on the same line (only useful with
logging to stderr or a console device).
Limit all messages to X characters per line.
Isdnlog can copy all information to /tmp/DEVICE (e.g. /tmp/isd-
nctrl0 if you started isdnlog with /dev/isdnctrl0). Choose what
debugging you want from the following list, add the correspond-
ing numbers together and use that for X:
1 copy all "HEX:" lines from the hisax isdn device driver.
2 copy /dev/isdnctrl output (or whatever device you speci-
4 copy /dev/isdninfo output
8 copy transfer values ("ibyte","obyte").
Isdnlog will close and reopen this file after a "kill -HUP".
Isdnlog will flush the debug file /tmp/DEVICE (e.g. /tmp/isdnc-
trl0) after each write access.
Copy the debug information to stdout. This way you can run
isdnlog as the source of a pipe like "isdnlog -P /dev/isdnctrl0
|prog ... ".
Start isdnlog as daemon: it will fork into the background, and
use syslog as the default logging method (if you did not specify
-T Trace mode: isdnlog will wait for a key after processing a line
from /dev/isdnctrl0 (or whatever device you specified).
-K Print for every pressed key the thruput. Can not used together
with option -d.
-b If you are using a bilingual network terminator (NT), you must
give this flag, or isdnlog will show the own MSN’s incorrectly.
NUMBER REWRITE MODULE
You can define aliases for telephone numbers (see callerid.conf(5) and
isdn.conf(5) for more information). Isdnlog will compare all numbers to
the list of aliases, and when a match is found, the alias is displayed
instead of the number.
Isdnlog can log information via syslog, to stdout, and send information
to x11 clients. Calculate a code from these numbers by adding them, and
activate logging with -s, -m or -x. You can use normal numbers or hex
numbers. Default is stderr mode -m, unless daemon mode is enabled; then
it’s syslog mode -l.
0x8 Log messages to /tmp/DEVICE (e.g. /tmp/isdnctrl0 if isdnlog is
started with /dev/isdnctrl0)
0x10 Show telephone numbers immediately.
0x20 Show charge int and telephone costs with every charge signal (in
Germany, and perhaps other countries, you have to pay to get
0x40 Show connect messages.
0x80 Show hang up messages.
0x100 Show cause message on hang up.
0x200 Show time messages.
0x400 Show throughput in bytes (every -wX seconds).
0x800 Show state of B-channels (use with -M monitor).
0x1000 Show service indicator.
You should log at least 0x7 (errors, warnings, notice) messages.
0x2000 Log estimated time till next charge signal.
0x4000 Show chargemax.
0x8000 Enable core file on SIGSEGV.
0x10000 ... 0x800000, show more diagnostic and debug messages.
Log to stderr.
Log to file X instead of stderr. Isdnlog will close this device
when it gets a signal -SIGHUP (-1). Only valid with -m option.
If the name starts with a "+", new data will be appended to the
existing file. Default behaviour is to truncate the file when
isdnlog opens it.
-C X console="path"
Log to console X instead of stderr. You can use -O and -C
together, so that isdnlog copies output to both. Specify a full
pathname. Beware: you must put a space between -C and X !
With this flag, isdnlog will generate output for monitor pro-
grams like imon, imontty or isdnmon. You must also give -m with
Log to syslog. X is the log code. You can log to syslog and to
stdout at the same time.
Pass information to x11 client. X is the log code. You can pass
information to x11 clients and log to syslog and/or stdout at
the same time.
Pass information to x11 client on this PORT.
Only with -xX : save the last X calls and pass this information
to an x11 client. Default value is 100.
Only with -xX : save the last X messages and pass this informa-
tion to an x11 client. Default value is 500.
If you enabled throughput logging (0x400), isdnlog will log the
throughput every X seconds.
Interval for printing of charge messages (0x20).
The first value is the interval for the calculated CI, the sec-
ond value for the EH (AOC-D) messages. If only one value is
given, both intervals are set to this value.
Value is a bitmap:
0 ... off
1 ... calls to different area / country
2 ... local calls too
4 ... special numbers e.g. ISP
This needs a kernel patch to work. If the kernel patch is not
found a simulation is done.
Note: depending on your telefon provider local area calls may or
may not be routed to alternate providers. For changing the ISP
a script is called. s. next option ’providerchange’
(There is no commandline option for this.) This script is
called with 3 parameters, the new provider number (from rate-
CC.dat), the number, which would be dialed, and the servicename.
The script should adjust routing, name resolution and so on to
connect to the ISP. If the script returns non zero, LCR will
not be done.
Isdnlog will set your local system time to the time transmitted
by your isdn service provider: -t1 = once, -t2 = every time.
The isdn kernel system has a chargehup system, so it will hang
up a few seconds before the next charge signal. If you don’t get
a charge signal from your phone company, isdnlog can emulate it.
On every outgoing connection, isdnlog will calculate the charge
time from day of week, time of day and the distance zone of the
The kernel needs to know how long the charge time is, and how
many seconds before the next charge signal it should hang up.
You have to set the second parameter with X in the form num-
ber:number (hang up seconds before next charge signal for charge
times greater than or equal to 20 seconds : for charge times of
less than 20 seconds).
With this information, isdnlog will call "isdnctrl chargeint
<device> <charge time>" and "isdnctrl huptimeout <device> <sec-
onds before charge signal>" (it actually communicates directly
with isdn, without calling isdnctrl, but this would have the
You should run isdnlog with -t1 or better with -t2, so isdnlog
sets the local time in sync with telephone switching office.
If there is a third number in value, this is the minimum connec-
tion time for providers charging a basic rate per connection.
e.g. hangup 3:5:60
isdnlog can react on any event and start programs. This feature is dis-
abled unless you activate it with:
active "START" feature. Please read callerid.conf(5) for more
(There is no commandline option for this.) If set to yes,
isdnlog will close all unnecessarily opened file descriptors
before a "START" program is executed. This closing will also
take place at isdnlog’s restart after SIGHUP. Default is no.
CONNECTION LOG MODULE
isdnlog will log all connections in /var/log/isdn.log. isdnrep can
parse this file and calculate costs.
SEVERAL ISDN CARDS
If you have more than one isdn card, you need to run one isdnlog for
each card. And every process must have a different name, so you should
create a symbolic link isdnlog1 -> isdnlog, and start isdnlog1 for the
UNLOADING KERNEL MODULES
You cannot unload isdn kernel modules while an isdn device is in use,
e.g. a PPP interface is defined or isdnlog is running. Look at /var/run
for a file isdnlog.DEVICE.pid with the process id of isdnlog, and kill
that. After that you should be able to unload your isdn kernel modules.
isdnlog requires a device as a parameter to read from (e.g.
/dev/isdnctrl0 for the 1st isdn card).
isdnlog can copy everything it reads to this file as debug
information (e.g. /tmp/isdnctrl0 if you started isdnlog with
isdnlog creates this file with its process id. Useful to see if
isdnlog is running.
isdnlog creates a lock file for the device, so no other pro-
cesses will access that device.
isdnlog config file. Options to isdnlog can be given on the com-
mand line, can be stored in this file in [options] (with command
line option -f/etc/isdn/isdn.conf), or in a different config
file, but isdnlog will look at this file for sections [global]
On SIGHUP isdnlog restarts, and does therefore reread it’s con-
SIGINT (-2), SIGTERM (-15), SIGQUIT (-3)
Isdnlog quits gracefully on receiving these termination signals.
If the log level contains 0x8000 (and your ulimits permit this)
isdnlog will generate a core file before terminating.
I start isdnlog with "isdnlog -f/etc/isdn/isdn.conf /dev/isdnctrl0".
This file contains a [options] section:
#newline=no # show all throughput messages in one line.
#width=80 # limit log messages to 80 characters per line
#amt=0:80:81 # digits to get a line through your PABX
log=15 # maximum debug mode
flush=no # flush logfile after every write
pipe=no # pipe log messages to stderr
daemon=yes # run isdnlog as daemon
stdout=0x1ff7 # stderr logging level
outfile=+/var/log/isdn.log # log to file
#console= # log to a console
monitor=yes # emulate output for imon/imontty/...
syslog=0x1ff7 # syslog logging level
#xisdn=0x07ff # x11 output level
#calls= # store call information for x11 client
#xlog= # store messages for x11 client
thruput=60 # if throughput logging is enabled: log every X seconds
time=2 # set time: 0 = never; 1 = once; 2 = every time
#hangup= # simulate charge signals
start=yes # enable starting programs
isdnconf(1) isdn.conf(5) callerid.conf(5)
isdnlog(5) isdnrep(1) isdnrate(1)
This manual page was written by Andreas Jellinghaus <aj@dun-
geon.inka.de>, for Debian GNU/Linux and isdn4linux, updated by Leopold
ISDN 4 Linux 3.7 2005/02/23 isdnlog(8)
Man(1) output converted with