Cipango is a SIP Servlet extension to the popular
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Jetty
HTTP Servlet engine. Cipango/Jetty is then a convergent SIP/HTTP Application Server compliant with both SIP Servlets 1.1 and HTTP Servlets 3.0 standards.
Using Cipango
Reference Documentation
SIP Servlet 1.1 API
Improve performance
Extras
Maven Integration
Web Sockets Connector