On Wed, 2007-05-23 at 12:28 +0700, Dome Charoenyost wrote: > Hi all, > Can someone tell me about GPL License ? > Why digium can sell g729 comercial module ?
They sell you a licence to the g729 patent. You can legally use the other (free and open-source) g729 libraries in countries where g729 isn't patented, or if you buy patent licences yourself (which is expensive, because the smallest quantity you can buy is tens of thousands). > Nor effect to Asterisk GPL license ? > same case some company make linux kernel module and distribute under > comercial license The GPL governs DISTRIBUTION, not USAGE. You can't DISTRIBUTE commercial software mixed with GPL software (a Linux distro can't ship nVidia's closed-source kernel module because the kernel is GPL) but you can USE GPL software any way you like (you can download nVidia's kernel module and install it yourself). Similarly a company that mixes GPL and commercial closed-source software internally does not have to follow the GPL, but if they give it to anyone else (ie. distribute it) they do. > Thanks. > > Dome C. Damjan _______________________________________________ Callweaver-dev mailing list [email protected] http://lists.callweaver.org/mailman/listinfo/callweaver-dev
