The Suretec Blog

I am writing this letter to Digium and all those that use or develop
software for Asterisk. Asterisk is released under a dual license, the
one I will focus on is the GPL license.

Digium maintains a trademark on the word Asterisk, along with other
words. The trademark policy they have forbids marketing a product with
the asterisk word if it is not "Genuine Digium Software". If you modify
software, apply a patch, add 3rd party modules, this trademark policy
prevents you from distributing that software saying that its based on
asterisk, or even using the name asterisk within the program.

I would agree that we have failed to make this as obvious as we
should, and that will be a topic of discussion and possibly
clarification in the document. Our intention has never been to lock
the word "Asterisk" so that it is impossible to use - that is not our
goal, nor is it possible legally. If you are a consultant who works
with Asterisk, by all means please put that on your website and in
your CV! We encourage that type of use; it broadens the Asterisk
ecosystem. Using the word "Asterisk" in a statement of factual use
is not prohibited - you can say "My company works on developing code
and systems which utilize Asterisk." However, when it becomes used
as a descriptive term such as "Asterisk Enabled" then that does seem
like it is an infringing use. More on this in the follow-up reply to
this soon to come.