Kamailio
Kamailio is an open-source SIP server used for building real-time communication applications, such as VoIP, video conferencing, and instant messaging. It functions as a proxy, registrar, and router for SIP traffic, enabling scalable and secure communication infrastructures. It is highly modular and extensible, supporting features like load balancing, authentication, and call routing.
Developers should learn Kamailio when building or managing SIP-based communication systems, such as VoIP services, PBX systems, or unified communications platforms. It is particularly useful for scenarios requiring high scalability, reliability, and customization, such as telecom operators, service providers, or enterprises deploying large-scale communication networks. Its open-source nature and flexibility make it a cost-effective alternative to proprietary solutions.