OpenSIPS is an open-source high performance SIP server. The picture below shows its internal architecture . OpenSIPS has modular architecture. Mainly consists of two parts:
- The core – This part provides the low-level functionality. It includes so called internal libraries. They collect code shared by several modules.
- The modules – are the components that provides the most of the functionality that make OpenSIPS powerful in real world deployments.
The architecture for OpenSIPS 1.X is shown in figure below.