Java SIP Servlet API 1.1 Reference

Packages
javax.servlet.sip The javax.servlet.sip package is the API for the SIP Servlets developed under JSR 289, this v1.1 version obsoletes v1.0.
javax.servlet.sip.annotation The javax.servlet.sip.annotation package contains SIP Servlet annotation definitions
javax.servlet.sip.ar The javax.servlet.sip.ar package contains Application Router interfaces
javax.servlet.sip.ar.spi The javax.servlet.sip.ar.spi package contains application router service provider interfaces.