wget http://www.wysdom.eu/trixbox/B410p-TB2.4.2.tar.gz

un-tar/gzip it

yum -y update and reboot your TB (Optional)

Then './B410p-AstZap'

Enter "nano /etc/misdn-init.conf" to edit that file
;Find the comment block about Port Settings. In mine it was set to "nt_ptmp=1,2,3,4"

The RED lights should now be flashing. Plug in ISDN2 and the port will have a steady RED light. L2 will show down, LI will be up.