Kamailio is an open source SIP Server software which is able to handle thousands of call setups per second. Even more importantly, it can be easily used for scaling up SIP-to-PSTN gateways, PBX systems or media servers like Asterisk, FreeSWITCH or SEMS, building large platforms for VoIP and real-time communication – presence, WebRTC, instant messaging and other applications. Thanks to the rich configuration language, modularity Kamailio enables to build carrier solutions.
Kamailio is used on systems with limited resources and also on carrier grade servers. It is designed to run on Linux/Unix systems with architecture specific optimization to offer higher performance. The combination of SIP core capabilities and extensible APIs gives the ability to build VoIP and UC platforms with Kamailio which is quite simple. It serves as collaborative environment for its users to develop secure SIP server in order to provide Unified Communication and VoIP services.
Kamailio has absorbed the features of SIP Express Router (SER) server. Simply put, you are not only able to take the full from the features that were provided by OpenSER and SER in the same server instance, but also a lot of new features added throughout the years. Kamailio provides a lot of powerful features to make customer experiences more enjoyable and easier.
Kamailio is released under GNU Public License v2 (GPLv2). Since 3.0.0 version, the application also includes parts of code under BSD license which can be used as individual components. The latest version of Kamailio v5.0.0 is released on February 2017. It comes with dynamic selection memory manager, improved HTTP client for API interactions, topology stripping more crypto tolls and many other new features.
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