Traffic balancing – load, weights, round robin ??

Many times, during discussion about various OpenSIPS based solutions, I noticed that people make a confusion when comes to the meaning of "load balancing". Whenever they talk about distributing SIP traffic between multiple destinations, the term of "load balancing" is abused in a very very generic way. Such a mis-usage of terms leads to mis-understandings … Continue reading Traffic balancing – load, weights, round robin ??

Distributed User Location replication using OpenSIPS

When building a large, highly-available, distributed VoIP platform, you definitely need to take into account geographically distributing you servers in different locations. And if you want them to be redundant and fail-over in case one of them goes down, you need to share a large amount of data between them. Users' location is a particular sensitive information that … Continue reading Distributed User Location replication using OpenSIPS

Capturing beyond SIP or capturing with Homer 6

Data capturing is vital for operating and troubleshooting SIP platforms. While capturing the SIP and RT(C)P traffic is essential, it is far from sufficient. The SIP platforms are far from being SIP engines only - there is a lot of non-SIP data, related to provisioning,  to backends or  integration (with other subsystem) or related to … Continue reading Capturing beyond SIP or capturing with Homer 6

Advanced SIP scenarios with Event-based-Routing

There is an increasing need for more complex SIP scenarios, even for the Class 4 Switches. Such scenarios exceed the capabilities of a liner processing - something more powerful and flexible is needed in turns of driving the SIP routing. The 2.1 OpenSIPS version brought a radical change in how the SIP traffic is handled - a … Continue reading Advanced SIP scenarios with Event-based-Routing

How to Use the Enhanced MongoDB Module in OpenSIPS 2.3

Great news for all users of the OpenSIPS "cachedb_mongodb" module! After four successful years since its initial release in Jan 2013, the driver will benefit from a complete revamp in the upcoming OpenSIPS 2.3, and will work on top of the latest libmongoc 1.6.0. The updated module will be compatible with all MongoDB 2.4+ servers. The main reasons … Continue reading How to Use the Enhanced MongoDB Module in OpenSIPS 2.3

FreeSWITCH-driven routing in OpenSIPS 2.3

SIP setups where OpenSIPS acts as a front-end for a farm of class 5 servers are becoming increasingly popular. Such architectures combine the best of both worlds: robust and optimized handling of SIP signaling with feature-rich class 5 softswitches. This way of integrating open-source projects has lead to a unique opportunity for our team, along with the FreeSWITCH team, to … Continue reading FreeSWITCH-driven routing in OpenSIPS 2.3

Troubleshooting missing ACK in SIP

We all experienced calls getting self disconnected after 5-10 seconds - usually disconnected by the callee side via a BYE request - but a BYE which was not triggered by the party behind the phone, but by the SIP stack/layer itself. This is one of the most common issues we get in SIP and one … Continue reading Troubleshooting missing ACK in SIP

RabbitMQ evolution with OpenSIPS 2.3

RabbitMQ is a powerful and widely used tool for message queuing integrations. And the usage of such a tool requires a more flexible support from OpenSIPS. Let's see what 2.3 has to offer when comes to RabbitMQ based integration. RabbitMQ is an open source message queuing/broker server, used by applications to publish messages on one side and consume them on the other … Continue reading RabbitMQ evolution with OpenSIPS 2.3

SIP-I and SIP with OpenSIPS 2.3

SIP-I considerations The SS7 interconnections are always painful. Both as cost and technical difficulty/complexity. So, as a more accessible alternative, the carriers started to offer SIP interconnection via SIP-I (SIP Infrastructure). SIP-I  or SIP Infrastructure (define by ITU) is very similar to SIP-T or SIP for Telephones (defined by IEFT). SIP-I is very powerful when … Continue reading SIP-I and SIP with OpenSIPS 2.3