To get a good technical overview over isdn4linux have a look at the
great whitepaper 'ISDN4Linux, CAPI4Linux, CPI4Hisax and other cute acronyms:
The ISDN subsystem in the Linux kernel', which can be found at:
For a Suse distribution the following information might be helpful:
/usr/doc/packages/i4l*(for i4l in general)
/usr/doc/faq/faq/PPP-FAQ(for synchronous PPP)
/usr/doc/howto/mini/Mail-Queue.gz(for email configuration)
For a Debian distribution the following information might be helpful:
If you are reader of the German computer magazine
ct, they had very
helpful articles at least on these issues:
Der erste Kontakt/Linux: Mit PPP ans Internet
Reiseleiter/Internet-Anbindung für das LAN
Bei Anruf Netz/Linux: Dial-In Server
Des Surfers Bastelstunde: Mobilfunktechnik HSCSD ausschöpfen(also contains information on dial-in configuration without HSCSD).
Bei Anruf Internet: Handy-Anruf löst Internet-Einwahl aus
Heimserver im Eigenbau - Teil 4: ISDN-Grundlagen für Linux(also contains information about the new mISDN driver). An online version is available on:
Tux vermittelt - Linux als Telefonanlage mit VoIP(refers to software PBX4Linux)
Guter Stern vom Amt - Asterisk: Linux als professionelle Telefonanlage(refers to PBX software asterisk)
Ein Pinguin als Sparfuchs - Linux-PC senkt Handy-Gebühren(refers to PBX software asterisk)
Also have a look at question config_links for helpful links on how to configure i4l (e.g. special help for SuSE, Red Hat, or Mandrake users).
The offical website can be found at: http://www.isdn4linux.de.
You can find it on: http://i4l.mediatronix.de/
The newsgroup was
de.alt.comm.isdn4linux, however had been
closed down some time ago due to spam issues. To get in contact with
the developers your best choice is to use the mailing list
docu_mailinglist. Alternatively, you find some interesting
The address of the mailing list is
email@example.com. Before posting a message
there please make sure it is not answered in this FAQ, and that the
question has not been answered numerous times in the past (search
http://www.deja.com/ with keywords like ISDN, Linux, i4l,
isdn4linux,...). People on the mailing list get really annoyed when
the question "can I fax with my card xxx" is asked yet another time
feature_fax for the answer).
To reduce spam, as of 25. Aug. 2003 the mailing list has been changed
to permit posts from subscribed members only. To write, you must be
When writing on the mailing list, please always provide:
Most isdn4linux developers are present on the mailing list, and many other knowledgeable people. English postings are very welcome, and will be answered in English!
The mailing list contains the same messages as the newsgroup (see question docu_newsgroup), so you can read any responses to your question with your news reader. A bidirectional gateway ensures that mailing list and news are in sync.
To subscribe to the mailing list, go to the web frontend at
submit the filled form. After that, you will not be subscribed yet.
Instead, you will receive a confirmation at the mail address you entered
in the above form. This is a security precaution to prevent subscription
by other persons or subscription of mistyped mail addresses. When you
receive the confirmation, just follow the instructions in that mail.
(I.e.: simply reply). After having replied, you will be subscribed and
receive a welcome mail. The welcome mail will contain your password, so
you should probably keep it just in case you want to unsubscribe or change
some options at the web frontend.
To unsubscribe, go to the web frontend again, use your password to login
and then unsubscribe.
Please note: there are about 20-50 messages per day on this mailing list.
To receive only one message per day, containing all postings, have a look
While filling the form as described in question docu_mailinglist, simply click "Yes" at the radio-button, named "Would you like to receive list mail batched in a daily digest". You can change this option later when logging in the web frontend.
To quickly search for keywords, you can use
http://www.deja.com. Make sure to also select older
archive to do a complete search.
Messages are also saved (unsorted) at listserv.isdn4linux.de, collected by month. To access the archive, you can use http://www.isdn4linux.de/listarch/.
Other archives are:
Yes, there is a bugtracker available under the following url: https://www.isdn4linux.de/mantis. You have to register yourself before you can search for known bugs and enter new issues.