Cipango is a SIP Servlet extension to the popular 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.
cipango User Guide
SIP Servlet 1.1 API Improve performance DNS
Cipango Community Issue Tracking
Example SIP application Kaleo Load SIP Servlet Application
Maven Integration Web Sockets Connector Diameter SIP Servlet extension Embedding Cipango