With the Java Servlet coded, the application can be deployed to any Java application server that supports the Servlet 3.1 specification or newer. In this Java file upload example, the target server is ...

SIP Servlet Defined in Java Specification Request 116, the SIP Servlet Specification provides a container-servlet programming model for SIP applications.

JSR 289: SIP Servlet v1.1 updates the SIP Servlet API and defines a standard application programming model to mix SIP servlets and Java EE components.