Kamailio (successor of OpenSER and SER) is an Open Source SIP Server released under GPL, able to handle thousands of call setups per second. Kamailio used to build huge platforms for VoIP and realtime communications – presence, WebRTC, Instant messaging and other applications. In addition, it can be easily used for scaling up SIP-to-PSTN gateways, media servers or PBX systems like Asterisk, FreeSWITCH or SEMS.
asynchronous TCP, UDP and SCTP, secure communication via TLS for VoIP (voice, video, text); SIMPLE instant informing and presence with embedded XCAP server and MSRP relay; WebSocket support for WebRTC; IPv4 and IPv6; asynchronous operations; IMS extensions for VoLTE; ENUM; DID and least cost routing; load balancing; routing fail-over, accounting, authentication and authorization. support for various backend systems such as MySQL, Cassandra, MongoDB, Postgres, Oracle, Radius, LDAP, Redis, Memcached; Json and XML RPC control interface, SNMP monitoring.
git client: apt-get install git-core – it is recommended to have a recent version, if your Linux distro has an old version. gcc compiler: apt-get install gcc flex – apt-get install flex bison – apt-get install bison libmysqlclient-dev – apt-get install libmysqlclient-dev make – apt-get install make if you want to enable more modules, some of them require extra libraries: 1. libssl – apt-get install libssl-dev 2. libcurl – apt-get install libcurl4-openssl-dev 3. libxml2 – apt-get install libxml2-dev 4. libpcre3 – apt-get install libpcre3-devNote: starting with version 4.3.0, Kamailio uses the directory /var/run/kamailio/ for creating FIFO and UnixSocket control files. You have to complete the section related to installation of init.d script for creating /var/run/kamailio even if you plan to start Kamailio manually from command line. The alternative is to set different paths via parameters of mi_fifo and ctl modules.
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