VOIP Setup : FreeSwitch & Kamailio

Title: Dsocument how to setup Kamailio (SIP server) & FreeSwitch (multi-protocol softswitch, supporting SIP) backed by Cassandra database I am creating a mobile application that uses VOIP and IM, but I need assistance documenting how to setup my server. Proposed architecture: Voip Phone (SIP client) -> [login to view URL] -> software load-balancer -> Kamailio -> software load-balancer? -> FreeSwitch (only in UDP) -> Real VOIP Provider. Kamailio - use Cassandra backend database - DDOS detection (WITH_ANTIFLOOD) - use with FreeSwitch (WITH_FREESWITCH) - TLS only FreeSwitch - Only communicate with Kamailio over UDP - Can there be multiple FreeSwitch servers for each Kamailio? Is it necessary during high load? - Configure to connect to real VOIP Provider STUN & TURN Server software - download & install & configure & enable Everything must be documented in a single document. Latest stable builds of each software component must be used (where possible). You need to start from a fresh Ubuntu install and document all the commands I need to run, explain in detail each command and guide me (in words) through the download & installation & configuration & enable of all components needed. Configuration must - work end-to-end. eg: phone -> myserver (Load-Balancers & Kamailio & FreeSwitch) -> VOIP Provider - have an example & working user-specific dialplan that is dynamic (eg: I can change each user's dialplan using scripting without restarting any components or completely reloading the config. of any component) For example, dialplan config stored in DB. - work with STUN & TURN (ICE?) - store call detail records in Cassandra database - be able to configure or disable default voice mailbox - use codec that is light on bandwidth but still has good voice quality How can we control/limit the number of channels on a per DID basis? What is a good load-balancing strategy? eg: by CPU load? how to do this? Give examples of good GUI web interfaces that we can use with these components. Provide examples how to - add,update/remove (using non-shell scripting, eg: SQL, PHP, or Java) - users - dial plans - dids - setup a conference - perform call to multiple devices (where they all start to ring at the same time) - send & receive messages (SMS & IM) using this architecture Describe how I can test the service (in detail). Please provide info of your relevant experience, proof where possible, examples, etc and the timeframe within you can deliver this. Thanks.