What Does Kamailio Do, Nov 16, 2022 · Kamailio offers VoIP providers robust SIP routing, scalability, high availability, and security features. Kamailio do support ANY possible and not possible codec, just because it not deal with RTP. At the time of writing the initial version of this tutorial, Debian Stable codename is Jessie, version 8. Kamailio can be used to build large platforms for VoIP and realtime communications – presence, WebRTC, Instant messaging and other applications. org. As a multitude of service operators in the VoIP industry, mobile telephony, and WebRTC have a SIP infrastructure, Kamailio is popular as the edge component of such networks. 7 stable is out – a minor release including fixes in code and documentation since v5. Kamailio images can be seen at: If a name is not matching a core parameter, then Kamailio will not start, rising an error during startup. So let’s get started! Other posts in the Kamailio 101 Series: Kamailio 101 – Tutorial 1 – Introduction Kamailio 101 – Tutorial 2 – Installation & First Run Anyone has access to wiki portals on both Kamailio® and SIP Router sites, feel free to enrich the existing content and add new docs. The blog post can be found at: Kamailio SIP Server overview Kamailio is a highly efficient, flexible SIP server used for signaling and routing in VoIP and telecommunications systems. Kamailio runs on Unix and Linux systems, ranging from embedded systems to large Kamailio by example - Introduction 2 minute read Intro Note: Read the official docs to get the most updated information. Nov 29, 2025 · Kamailio (formerly known as OpenSER) is a free and open-source SIP (Session Initiation Protocol) server. s. for IP telephony operators or carriers Discover how Kamailio can enhance your VoIP network with its powerful features, robust security, and scalability for seamless, high-quality communication. General Rules Some rules of thumb to get you started with writing Kamailio configs: All lines that do things (instructions) have to end with a The ghcr. Transport Layers What transport layer protocols are implemented in Kamailio? Does Kamailio have support for WebSockets? Can Kamailio do gatewaying between transport layers? Can Kamailio be used to call from web browsers (webrtc) to classic SIP phones? Modules What is a Kamailio module? Since 2008, Kamailio project has absorbed the features SIP Express Router (SER) server. It is, what you define it to be. 168. Far from having been… Usually setting a parameter is ended by end of line, but it can be also ended with ; (semicolon). Overview Kamailio packages are included in the official Debian Stable repository. Formerly OpenSER and SER, Kamilio is able to handle thousands of calls per second without a hiccup. 1 (stable) from Git repository. *, gentoo/kamailio. org> Overview This is a step by step tutorial about how to install and maintain Kamailio SIP server v5. Combining its SIP core capabilities and extensible APIs, building VoIP and Unified Communication Platforms using Kamailio (K) is Should anyone notice any illegal content please email to sr-dev@lists. Its core provides essential functionality like message parsing, transport handling, and memory management, while modules extend its capabilities for specific requirements. Why Do VoIP Experts Love Kamailio? Blazing Fast Performance – Kamailio can handle hundreds of thousands of calls per second with low resource consumption. Future Kamailio posts I’ll be talking about using specific modules and using Kamailio for specific use cases, such as load balancing traffic between carriers and monitoring their up/down status, scaling Asterisk by front Kamailio SIP Server v5. , in Bourne shell, call Kamailio vs Asterisk—explained for VoIP architects. 1, which also acts as a registrar, and front-ends an elastic group of media servers which are located on a private subnet, 192. We note that the JSON module for Kamailio was written and contributed by FlowRoute, a well regarded SIP Trunking Service. The core specification document is RFC3261. Learn SIP routing, registration, and config logic the right way from Day 1! Kamailio: Your SIP Server Superhero Kamailio is an open-source Session Initiation Protocol (SIP) server that has been designed to manage a high number of calls and offers a large amount of flexibility. what are the modules that you use and need database connections? Normally, if a module does not do queries to database when handling sip traffic, it should not keep the connection open. It was in response to the often-asked question in the Kamailio and open source-focused VoIP consulting arena about whether Kamailio is an SBC, or can be made to serve as an SBC. 4 Hours of Deep Focus Music for Studying - Concentration Music For Deep Thinking And Focus Kamailio - The Open Source SIP Server for large VoIP and real-time communication platforms - - kamailio/kamailio rpm/kamailio. Y. Welcome To Kamailio – The Open Source SIP Server Kamailio® (successor of former OpenSER and SER) is an Open Source SIP Server released under GPLv2+, able to handle thousands of call setups per second. You can change these parameters in the /etc/kamailio/kamctlrc file before the None Kamailio v5. content for futher informations 4) optionally, you can watch the server's health using the kamctl utility - to do so, first set the environment variable SIP_DOMAIN to your domain name, e. The configuration file and database schema compatibility is preserved, which means you don’t have to change anything to update. Kamailio can do anything you can think of (to do with signaling). 6. org Important: keep the mailing list in the recipients, do not reply only to the sender! Want to know about Kamailio and how does it benefit VoIP Service Providers? Read this blog to know everything about it. Following sections provide an index to projects’ documentation resources. . After setting up our Ubuntu box we’ll update our repos and install Kamailio apt-get update apt-get install kamailio* Now we’ve installed Kamailio with all the extra In early 2013, more than five years ago, I wrote an article: "Kamailio as an SBC (Session Border Controller)". In simple words Kamailio is an open source SIP server. It is used for routing, load balancing, and security in VoIP (Voice over Internet Protocol) and real-time communication platforms. Known for its scalability and modular design, Kamailio is popular in complex telephony networks, supporting SIP proxy, registrar, and more for real-time communications (RTC). init) You can start Kamailio directly with /usr/local/sbin/kamailio. Alpine allows to create smaller and secure docker images. 2. x using the sources downloaded from GIT repository. Discover how Kamailio WebRTC optimization improves VoIP deployments with better signaling, security, and call performance for seamless real-time communication. So now we’ve made a functional bare-bones PBX using Kamailio, and we’ve touched upon a few of the key functions Kamailio can do, but let’s go over them again to recap. OpenSIPS? Let's discover find the right SIP server for your VoIP communication. To fully harness its capabilities, it's essential to understand Kamailio, formerly OpenSER (and sharing some common history with SIP Express Router (SER)), is an SIP server licensed under the GPL-2. Special chapters are dedicated to troubleshooting and security when deploying VoIP platforms using Kamailio. Contribute to silentindark/kamailio_guide development by creating an account on GitHub. It can be configured to act as a SIP registrar, proxy or redirect server, and features presence support, RADIUS / syslog accounting and authorization, XML-RPC and JSON-RPC -based remote Kamailio Setup and Basic Configuration Guide. Kamailio is a framework for building real time communication platform, the first edition of the book is not presenting in details many of its typical use cases, but it has a chapter that collects references on how to do it. Z, the value is X00Y00Z, representing X*1000000 + Y*1000 + Z) OS_NAME - associated with a string representing the Operating System name Examples: Usually setting a parameter is ended by end of line, but it can be also ended with ; (semicolon). LAWYER: If Police Ask 'Do You Have A Gun?', Say This Lawrence: The protesters are forcing Trump’s retreat. Note: this repository collects tutorials that do not need to be updated for each Kamailio major release. Start by setting up a basic rule that routes all incoming SIP INVITE requests to a specific destination. org or open an issue. To set up SIP routing in Kamailio, you need to define routing rules in the kamailio. Troubleshooting Kamailio and SIP requires knowledge of various tools for reading and searching Set up your Kamailio SIP server from scratch. Kamailio is a versatile and open-source SIP server designed to handle voice, video, and messaging traffic over the internet. Kamailio's agility ensures that it can seamlessly evolve alongside technological advancements, making it a key player in the ongoing evolution of VoIP. Kamailio in a distributed setup Kamailio works fine with usual distributed databases Master-slave or Master-Master setup Different Cluster technologies For new deployments you can get rid of the database completely with DMQ Distributed message queue on Kamailio to enable the passing & replication of data between multiple Kamailio servers The function http_client_query () allows Kamailio to issue an HTTP GET request and get access to parts of the reply. Unparalleled Scalability – From a tiny VoIP network to a worldwide telecom system, Kamailio scales with you! Being developed for Unix/Linux, managing a Kamailio instance, from installation to runtime and maintenance involves operations specific for Linux administration, like running command line applications from terminal, configure network and firewall to allow sending/receiving SIP and RTP packets, a. Yes, you have add that code in your script, it is not in default script. The value is typically an integer, boolean or a string. It can be configured to act as a SIP registrar, proxy or redirect server, and features presence support, RADIUS / syslog accounting and authorization, XML-RPC and JSON-RPC-based remote control, SQL and NoSQL backends, IMS / VoLTE extensions Documentation and Tutorials for Kamailio SIP Server - kamailio/kamailio-docs Kamailio Load Balancer helps scale your SIP traffic smartly. It means that it works at the lower layer of SIP packets, routing each and every SIP message that it receives based on the policies specified in the configuration file. Find out their core roles, strengths, and best use cases in building modern SIP infrastructure. And that’s the awesome part of Kamailio. gz. Compared to traditional solutions, Kamailio's modular design stands out. From call routing and load balancing to security features, Kamailio provides a robust framework that caters to diverse telecommunication requirements. Does Kamailio have support for WebSockets? Can Kamailio do gatewaying between transport layers? Can Kamailio be used to call from web browsers (webrtc) to classic SIP Phones + Modules What is a Kamailio module? Where are Kamailio modules located? Which modules are compiled by default? How can I compile and install a module that is excluded by Kamailio can do all of that. The Kamailio SIP server is designed for scalability, targeting large deployments (e. io/kamailio/kamailio docker image is using Debian. By default Kamailio uses the MySQL database ‘kamailio’ with user ‘kamailio’ and password ‘kamailiorw’. You can deal with RTP using rtpproxy and "negotiate" codecs using SDPOPS module. The only mandatory routing block is request_route, which contains the actions for deciding the routing for SIP requests. 0/24. org To unsubscribe send an email to sr-users-leave@lists. None Install Kamailio On Debian For more details about Kamailio Project visit: kamailio. Solaris: check the tar. 04, installed from the default repos using apt-get, but these concepts will apply to any version 4. This also means that the Kamailio server bridges SIP (and as we shall see, RTP, by way of RTPEngine) between two different network interfaces. The ghcr. With a rich configuration language, modularity and continuous development Kamailio is the choice for building enterprise as well as carrier solutions. The focus of this tutorial is to install Routing Blocks Section This is the last section of the configuration file, typically the biggest one, containing the routing blocks with the routing logic for SIP traffic handled by Kamailio. Kamailio is an open source implementation of a SIP Signaling Server. 7. This tutorial will use Kamailio on Ubuntu 18. If you are familiar with Debian, then this image may be a choice to start with and extend. What are the key differences between Kamailio vs. cfg file. org organization is not responsible for the content contributed by external people and commits to react in a reasonable time when such content is reported. Tutorials and how-to guides for specific Kamailio SIP server use cases. See the chapter Routing Blocks in this document for more details about what types Predefined keywords: KAMAILIO_X[_Y[_Z]] - Kamailio versions MOD_X - when module X has been loaded KAMAILIO_VERSION - associated with a number representation of Kamailio version (e. Kamailio, formerly OpenSER (and sharing some common history with SIP Express Router (SER)), is an SIP server licensed under the GPL-2. If a name is not matching a core parameter, then Kamailio will not start, rising an error during startup. In other words, you benefit of all features that used to be provided in the past by OpenSER and SER in the same SIP server instance, plus many new features added along the years. This should be used when the grammar of a parameter allows values on multiple lines (like listen or alias) and the next line creates a conflict by being swallowed as part of value for previous parameter. Z, the value is X00Y00Z, representing X*1000000 + Y*1000 + Z) OS_NAME - associated with a string representing the Operating System name Examples: Henning Westerholt, one of the project’s core developers, published a tutorial on how to use Kamailio as SBC (Session Border Controller) for Microsoft Teams. init. x Kamailio instance, though some of your directories & file names may differ. kamailio. Apr 28, 2025 · Kamailio is a powerful, flexible SIP server with a modular architecture that allows it to be customized for various use cases. It routes SIP traffic, manages user registrations, handles NAT traversal, and secures VoIP systems. Now that we have resources to learn about Kamailio and a lab ready to test it, let’s do our Hello, World! hello loadmodule "sl" request_route { sl_send_reply(200, "Hello, World!"); } It talks to a Kamailio server, 70. As you go along you learn more efficient ways to do things, so before we hop to far into Kamailio we’re going to talk about how we’ll write our kamailio. On the following pages, you will find simple Kamailio configuration examples that helped me understand how Kamailio works. Main author: Daniel-Constantin Mierla Support: <sr-users@lists. This The Kamailio ® SIP server is a leading Open Source software for building SIP services such as a SIP proxy, SIP Presence Server, SIP location server and much more. x. I know when I look back on code I’ve written in the past I cringe a little. This function has been ported from the utils module and now use the same libcurl functions. kamailio. Jul 9, 2025 · Kamailio is an open-source SIP server trusted by global VoIP providers for its high performance, scalability, and extensive customization options. Kamailio does; however, appear to be more widely used in the industry, and we think it’s now a much more even fight. Here are some resources to learn more about Kamailio. It supports custom routing logic, multi-tenancy, and integration with databases and APIs, allowing providers to build custom VoIP solutions and manage large volumes of SIP traffic efficiently. 0-or-later license. Are there any implications of this? If there is no connection available I expect Kamailio to open one when needed. In conclusion, Kamailio emerges as a pivotal force shaping the future of VoIP. 1 - Install Guide Guide to install Kamailio SIP Server v5. The initial name of the project was SIP Express Router (aka SER) and that says it all: Kamailio is a SIP router at the core. 1. Predefined keywords: KAMAILIO_X[_Y[_Z]] - Kamailio versions MOD_X - when module X has been loaded KAMAILIO_VERSION - associated with a number representation of Kamailio version (e. Learn how it works, use cases, and why it's crucial for high-performance VoIP systems. 1 Kamailio do not negotiate any codec and not deal with SDP part (which have info about codecs) at all. , for version X. For more about Kamailio Project visit: kamailio. Moreover, it can be easily used for scaling What is advanced configuration in Kamailio you should consider to enhance VoIP calls & messages? Let's find it out in our article! Kamailio is part of an ecosystem of other open-source projects, and it's used by a large number of service providers around the world. SIP is an open standard protocol specified by the IETF. g. This tutorial should just work for latest Ubuntu versions as well. io/kamailio/kamailio-ci docker image is using Alpine. o. Cheers, Daniel __________________________________________________________ Kamailio - Users Mailing List - Non Commercial Discussions -- sr-users@lists. 8tdjs, rhv75e, vuqj, x03dm, b1hlzg, uqaqg, 6ieyj, 5kjwm, zur06, xb1uj,