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OpenSIPS

OpenSIPS vs Asterisk

January 17, 2012

OpenSIPS and Asterisk are both open source projects and both are used for Voice over IP. However, they perform quite different roles, have different capabilities and different strengths and weaknesses. This article reviews how they are so different and considers what role each product can play in the infrastructure of an Internet Telephony Service Provider [...]

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What is OpenSIPS?

December 31, 2011

There are a number of open source applications available that are used to build IP Telephony solutions. OpenSIPS may not be as well-known as Asterisk, but it is widely used by service providers as a core part of their infrastructure because of its robustness, speed and capacity. In this article I will review the history [...]

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Clustering OpenSIPS for High Availability – Part 3

December 8, 2010

In this, part 3, we examine how a virtual IP address can be switched between two Linux servers to provide an active/standby failover and how this impacts on OpenSIPS. Part 2 investigated the implications for far-end NAT traversal of clustering two OpenSIPS servers and concluded that the best solution is the use of a virtual IP address. [...]

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Clustering OpenSIPS for High Availability – Part 2

November 23, 2010

In this, part 2, we investigate the implications of using more than one IP address on an OpenSIPS server and how this impacts on far-end NAT traversal. We will also see how the use of a virtual IP address can overcome these problems when clustering two OpenSIPS servers. Part 1 reviewed why we might want [...]

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Clustering OpenSIPS for High Availability – Part 1

November 16, 2010

Why cluster OpenSIPS? Unlike Asterisk, a typical OpenSIPS server is able to handle a very large number of simultaneous SIP calls. It is generally very reliable and will keep running for many months, or even years, with little or no attention. As a consequence, it is the preferred choice for many VoIP service providers who [...]

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How secure is your Asterisk PBX? – part 1

October 5, 2010

A growing problem Like a slice of Victoria sponge cake on a summers day attracts wasps, so new technologies seem to attract the attention of cyber-criminals. The more widely used the technology, the greater the interest. It was inevitable, and widely predicted, that VoIP would become a favorite target for hackers as its popularity and uptake increased [...]

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Installing Mediaproxy 2 on CentOS 5 64bit

September 10, 2010

Mediaproxy 2 is a Python application from AG-Projects which is available as a free download as well as being available as a commercial product from AG-Projects. It is used in combination with the Mediaproxy module of OpenSIPS. Unlike Mediaproxy 1, the new version has a lot of dependencies and it can be quite tricky to [...]

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Installing OpenSIPS v1.6.1 on CentOS 5 64bit

August 23, 2010

Smartvox Limited offers a consultancy for installation of OpenSIPS -we have expertise and experience installing and configuring OpenSIPS, Asterisk and PSTN gateways. We also have a wealth of experience in systems integration and networking to get your OpenSIPS server working smoothly with your existing VoIP infrastructure. Details of our consultancy services are located here. However, [...]

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High Availability and Failover options for SIP and Asterisk

May 29, 2009

Overview What’s the disaster we are trying to avoid? The assumed scenario is this: Some kind of centralised VoIP service is being offered to a number of users; the service operates on servers located at a data centre or office and the users each have a SIP client device, such as an IP phone, that [...]

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