JAIN (Java APIs for Integrated Networks)

In short, JAIN standardizes interfaces between network components (primarily for signaling), and provides an event-driven application server architecture and APIs (SLEE). It helps to integrate IP and IN (Intelligent Networks) protocols.

There are APIs for high-level application development (eg Service Provider APIs, SLEE - Service Logic Execution Environment), Call Control, as well as protocol level APIs for signaling (SIP, MGCP, SS7, etc.). It does not cover the OSS/BSS systems that support the business and operations management, which is covered by OSS/J.

Homepage: http://java.sun.com/products/jain/index.jsp