It is easy to install mISDN and mISDNuser. This can be done by:
then compile and install both with:
cd mISDN ; make && make install
cd mISDNuser ; make && make install
cd asterisk ; ./configure && make && make install
Follow the instructions in the mISDN Package for how to load the Kernel Modules. Also install process described in http://www.misdn.org/index.php/Installing_mISDN