SIP Servlet POJOs are SIP Servlets that do not extend from generic Servlets defined by the GenericServlet interface. They are simple POJOs annotated with an @SipServlet annotation. These POJOs contain annotated methods invoked by Converged Application Server when a SIP message arrives.

Any Java class that is annotated with @SipServlet, but does not extend from javax.servlet.sip.Servlet, is a SIP Servlet POJO. SIP Servlet POJOs support all elements of the @SipServlet annotation. The SIP Container treats POJOs similar to a component class listed in Table EE.5-1 of Java EE specification. These classes act as a Common Dependency Injection (CDI) managed bean and hence support all CDI capabilities explained in the Java EE CDI specification.