We would like to split our allocated time in two parts: the first one will present the OpenSIPS server in the context of distributed VoIP Platforms - the challenges we have encountered and the solutions we have designed in order to overcome them. We will present how to build a geo-distributed scallable platform with OpenSIPS, and will also concern about security issues, monitoring and integration. In the second part we are planning to assist the slides with some practical examples, that will conclude the topics presented above. A short list of demos we have in mind is: distributed rate limiting, distributed load balancing, as well as techniques for interacting with external applications, like monitoring or taking self-protecting actions.