dahdi-linux-complete-2.4.0+2.4.0/tools/UPGRADE.txt
Upgrade Notes ————-
Information for upgrading from Zaptel 1.2 or 1.4 to DAHDI 2.0
Upgrading from Zaptel to DAHDI is fairly straightforward; install this package using the installation instructions, and then reconfigure and rebuild Asterisk; Asterisk 1.4 releases later than 1.4.21, and all releases of Asterisk 1.6, will automatically use DAHDI in preference to [...]
