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What is Kamailio / Siremis?

Kamailio™ (former OpenSER) is an Open Source SIP Server released under GPL, able to handle thousands of call setups per second. Among features: asynchronous TCP, UDP and SCTP, secure communication via TLS for VoIP (voice, video); WebSocket support for WebRTC; IPv4 and IPv6; SIMPLE instant messaging and presence with embedded XCAP server and MSRP relay; IMS extensions; ENUM; DID and least cost routing; load balancing; routing fail-over; accounting, authentication and authorization; support for many backend systems such as MySQL, Postgres, Oracle, Radius, LDAP, Redis, Cassandra; XMLRPC control interface, SNMP monitoring. It can be used to build large VoIP servicing platforms or to scale up SIP-to-PSTN gateways, PBX systems or media servers like Asterisk™, FreeSWITCH™ or SEMS.

Siremis is a web management interface for Kamailio allowing to provision user profiles, routing rules, view accounting, registered phones, display charts, communicate with SIP server via xmlrpc, a.s.o.



Example Scenario:

REF: http://kb.asipto.com/asterisk:realtime:kamailio-4.0.x-asterisk-11.3.0-astdb


Kamailio does authentication for registration. If successful, it notifies Asterisk with a new REGISTER that the phone is available at its IP.

Call Initiation

Call authentication is handled by Kamailio. When a new calls arrives and it is authenticated, Kamailio forwards it to Asterisk. If destination number is online, Asterisk will send the call back to Kamailio since the contact of destination is Kamailio IP. Then Kamailio will do location lookup and send to destination phone IP.

Kamailio / Siremis Website

User Mailing List

An unmanaged Kamailio / Siremis VPS hosted at LYLIX is a great solution for your telephony needs. Each server is backed by the standard array of features found with every LYLIX VPS

Besides our VOIP optimized environment, the VPS solution is completely scalable; if you're just starting out small you can begin with the basic resources, but as your activity and volume grow, your VPS can be seamlessly upgraded!

Monthly Traffic Calculator

Enter your estimated call traffic in minutes per month below and the amount of monthly traffic required will be calculated and the pricing chart to the left updated with the appropriate traffic plan and new monthly VPS price.

Enter minutes per month:
Total monthly traffic: 0.00 GB

Calculated using g711 (Ulaw) codec and two active call legs (trunk + extension).

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