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 any-
thing 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 originate 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 outgo-
ing calls from any device (see dual option below).
-V show version information and exit.
-fFILE read options from the config file FILE. 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 com-
mand 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/isdnctrl2 for the second).
Isdnlog has a replay mode for debugging, where you can simulate previous recorded
events. In that case use "-" instead of a device.
Set digits necessary to get an outside line, when connected through a PABX. You
can give several codes padded with a ":" (e.g. -A0:80:81:82).
Set the provider preselection to the given value. More prefixes may be separated by
Values are e.g. "010" for DE, "10" for AT, "16:17" for NL, "9" for FR.
Set the preselected (i.e the provider choosen, if no prefix is dialed) provider to
value. Value should be without vbn.
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 option.
This option requires two values separated with ":" as an argument. 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 confuse the system (and
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 lead-
ing zero). So, in this case, the option -03:2 would be correct.
Telefon number shorter then value are considered to be internal numbers one your
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. Value 0 is default, and tells isdnlog to
not ignore COLP/CLIP frames.
Sometimes the COLP number is a number in a different areacode to the number that
was dialled, and then the cost calculation would be wrong.
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 dis-
-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/isdnctrl0 if you started
isdnlog with /dev/isdnctrl0). Choose what debugging you want from the following
list, add the corresponding 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 specified).
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/isdnctrl0) after each
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 -m).
-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
0x10 Show telephone numbers immediately.
0x20 Show charge int and telephone costs with every charge signal (in Germany, and per-
haps other countries, you have to pay to get these signals).
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 sig-
nal -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 programs like imon,
imontty or isdnmon. You must also give -m with 0x800 enabled.
Log to syslog. X is the log code. You can log to syslog and to stdout at the same
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 information to an x11
client. Default value is 500.
If you enabled throughput logging (0x400), isdnlog will log the throughput every X
Interval for printing of charge messages (0x20).
The first value is the interval for the calculated CI, the second 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
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
(There is no commandline option for this) This script is called with 3 parameters,
the new provider number (fron 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 ser-
vice 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 connection.
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 number: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 sec-
With this information, isdnlog will call "isdnctrl chargeint <device> <charge
time>" and "isdnctrl huptimeout <device> <seconds before charge signal>" (it actu-
ally communicates directly with isdn, without calling isdnctrl, but this would have
the same effect).
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 connection 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 disabled unless you
activate it with:
active "START" feature. Please read callerid.conf(5) for more information.
CONNECTION LOG MODULE
isdnlog will log all connections in /var/log/isdn.log. isdnrep can parse this file and
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 second card.
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
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 /dev/isdnctrl0).
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 processes will access that
isdnlog config file. Options to isdnlog can be given on the command 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] [variables] [isdnlog].
On SIGHUP isdnlog restarts, and does therefore reread it's config files.
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) isdlog will gener-
ate a core file before terminating.
I start isdnlog with "isdnlog -f/etc/isdn/isdn.conf /dev/isdnctrl0". This file contains a
#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) rate-files(5) isdnrate(1)
This manual page was written by Andreas Jellinghaus <firstname.lastname@example.org>, for Debian
GNU/Linux and isdn4linux, updated by Leopold Toetsch <email@example.com>.
ISDN 4 Linux 3.1pre4 2002/03/11 isdnlog(8)