Two ZAPHFC cards and Kernel 2.6
Support for BRI in Asterisk is bewildering and highly dependant upon the driver
BRIstuff is a set of patches and BRI drivers, along with automated download and patching scripts for Asterisk, Zaptel and Libpri
Asterisk and BRI ISDN Cards
Asterisk 1.4 (deutsch - unstable)
FreePBX is a full-featured PBX web application.