[Asterisk-Users] Is there a SIP protocol stack inside asterisk?

[steve at daviesfam.org]

On Thu, 14 Apr 2005, Abraham WEI wrote:

> Hello, all.
> I wonder if there is a SIP stack within asterisk. I need to build my own 
> application based on a SIP stack. I don't know if asterisk is able to help 
> me on this. Could anyone give some ideas?

Hi,

There is a SIP stack in Asterisk - but rather integrated, and (some might 
say ;-) ) not the world most perfect SIP implementation.

You can find a bunch of options at 
http://www.voip-info.org/tiki-index.php?page=Protocol%20Stacks%20and%20Development%20Services

A number of them are open-source/free (Vovida's is one I know about).

Steve