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1. general: General information about isdn4linux

1.1 general_i4l: What is isdn4linux?

isdn4linux is a set of kernel modules which are part of the Linux kernel. It consists of the main module isdn and the actual hardware driver that control some specific card. In addition, the package isdn4k-utils contains utilities to make use of ISDN specific features.

1.2 general_hardware: What hardware is supported by isdn4linux?

Generally, isdn4linux can control ISDN cards that are connected to the PC's ISA or PCI bus. Also a few PCMCIA cards are supported. However, isdn4linux can not make use of any devices connected via a serial or parallel interface (which are called 'terminal adaptors'), with only a few exceptions: the Creatix/Teles S0 box for the parallel port, and the Gazel 128 USB. For more details on which cards are supported see section hardware.

1.3 general_features: What features are supported by isdn4linux?

Basically, isdn4linux can receive and transmit data via ISDN in several ways (X.75, HDLC, raw ip, synchronous ppp, asynchronous ppp, V.110). Some of its utilities offer additional features. Two examples are isdnlog, which allows logging of and reaction to ISDN events (including calculating any charges); and vbox, which provides voice answering machine capabilities. For more details see the section feature.

1.4 general_countries: Which countries are supported by isdn4linux?

At least all countries which use Euro-ISDN are supported, however some pecularities apply. To find more about your country, check the section countries.

1.5 general_docu: Where do I find more documentation, how-to's, helpful tips & tricks?

Besides this FAQ, take a look at the various man pages and Readme's that come with the isdn4linux package. Then there is the isdn4linux website: http://www.isdn4linux.de. There is also a mailing list on isdn4linux which will give you the most up to date information. To find out more about these great information sources, see section docu. And: check out all the great links listed in question config_links! You may find information in your language, or information specific to your linux distribution.

1.6 general_getlatest: Where do I get the latest version of isdn4linux?

The latest version of the kernel drivers should be found in the Linux kernel. However, sometimes the Linux kernel does not have the latest version or does not yet support your ISDN card. Additionally, you may need to use the isdn4k-util package. In those cases you could try to get the very latest version that is currently in development. See the section distrib.

1.7 general_contacts: How can I get in contact with the developers?

You can contact the isdn4linux developers through the www.isdn4linux.de website. Have a look at http://www.isdn4linux.de/contacts.shtml.