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Kamailio is a free high-performance, configurable, SIP( RFC3261 ) server . Kamailio is a fast and flexible SIP server. Kamailio can handle thousands of calls per second on low-configuration machine. Kamailio has C shell-like scripting language to provide full control over the server’s behavior. Kamailio has modular architecture that lets users load only the required modules/functionality

It is customizable, being able to feature as fast load balancer; SIP server flavours: registrar, location server, proxy server, redirect server; gateway to SMS/XMPP; or advanced VoIP application server.

We customize the Kamailio as per routing logic and requirements.

Kamailio can be usd for following servers :

  • SIP proxy server
  • SIP registrar server
  • SIP location server
  • SIP application server
  • SIP dispatcher server


  • Kamailio can run on embedded systems, with limited resources – the performances can be up to hundreds of call setups per second
  • Used a load balancer in stateless mode, Kamailio can handle over 5000 call setups per second
  • On systems with 4GB memory, Kamailio can serve a population over 300 000 online subscribers
  • System can easily scale by adding more Kamailio servers
  • Kamailio can be used in geographic distributed VoIP platforms
  • Straightforward failover and redundancy