Really, email ans sms can be used everywhere, but the old solution using telefax service is still alive. And in some countries this is the better way for e.g. abrogation or signing documents.
To run telefax service on your computer you need one of this hardware:
And for telefax service on a computer with GNU/Linux operating system you some tools:
Unfortunately there are two different versions of HylaFAX because of forking in year 2006. Personally I like the version HylaFAX+ (sources: hylafax.sourceforge.net), but some GNU/Linux distributions have only HylaFAX (sources: www.hylafax.org).
This is a small frontend for printing about your cups server. It supplies frontends for: efax, hylafax, mgetty-fax.
If you want send fax with your isdn card, you need this tool as connective link between your capi driver (kernel driver) and the HylaFAX server.
If you want send fax with your isdn card, you need this tool
as connective link between your isdn card driver (kernel driver
e.g. for fritzcard: fcpi or fcusb2) and the capi driver of your
After a long inactive development time since 2012 the developing has begun again at a new internet address (only as git): git.misdn.eu project isdn4k-utils.
If you want send fax with an isdn card of AVM, named fritzcard pci, which is a pci expansion card you need this driver. The fcpci driver is a kernel module which contains a binary made by AVM and the interface to the linux kernel.
If you want send fax with an isdn usb2 device of AVM, named fritzcard usb2, which is an external usb device you need this driver. The fcusb2 driver is a kernel module which contains a binary made by AVM and the interface to the linux kernel.
The "modular ISDN" driver for Linux was startet by Karsten Keil (SuSE AG) and Andreas Eversberg (known as Jolly) as replacement for hisax (isdn4linux). It is a complete structural change to be much more flexible. It supports especially dynamical loading of Layers, which makes it possible to link layers between the Userspace and the Kernelspace. More information at www.misdn.eu. Source code can be found in git repository of the project: git.misdn.eu project mISDNuser.