Cuortesy of Elias Baixas of Voztelecom, OpenSER makes big steps towards Application Server as well. As core developers focuses more on SIP routing, new contributions came to extend functionality to enable creation of VoIP applications in a easy and flexible manner. With new Perl and SEAS/WeSIP extensions, writing SIP applications without getting deep in SIP specifications becomes reality.

Pasting from the initial announcement of SEAS module:

" This module allows a third party to create an Application Server and connect it to OpenSER to interoperate seamlessly. [...]

The module also allows OpenSER to notify the Application Server when requests/responses come in, and then transfer the control over the incoming request entirely to the Application Server. [...]

SEAS module has been written to work with an Application Server developed by VozTelecom. It is called WeSIP and can be downloaded freely from http://www.wesip.eu . WeSIP is an implementation of the SipServlet and HttpServlet standards, so it allows a programmer to easily implement Web-Sip converged applications (such as Click2call). WeSIP is programmed entirely in Java, so you have all the tools and facilities from Java and J2EE available to program SIP applications, while already using OpenSER to process the SIP messages and transactions at the low level, thus profitting both from the high performance of OpenSER, and the high-level SIP-Application programming framework which is SipServlet and the JAVA language. "

You can read the announcement at:

http://openser.org/pipermail/devel/2006-December/005077.html

Documentation for SEAS module:

http://www.openser.org/docs/modules/1.2.x/seas.html