under this directory, there are: 1) mISDN for bri cards, under this directory, users can download the zip files and recompile misdn, or manually edit the hfcmulti.c with the patch. 2) bristuff with different versions for bri cards and G400P GSM driver, under this directory, there are 2.1) few patches for different the versions of bristuff. patched file called qozap.c file for BRI/200/400/800P. 2.2) OpenVox G400P GSM card driver. 3) zaptel/, this directory includes some versions of zaptel for a1200p/a800p and de115p. 4) dahdi-patches/, this directory includes few individual files for a1200p/a800p and de115p with dahdi. 5) failover/, this is failover(FD40/FB40/FD40) application directory, you can download the utlities from here and compile that. 6) dahdi-linux, this is a patched dahdi-linux and added opvxa1200.c and de115p. 7) dahdi-linux-complete, this is a version, which combine the dahdi-linux and dahdi-tools and patched for a1200p/a800p and de115p. 8) dahdi-tools, it contains patched files for de115p.