September 2023 marked the 3rd edition of OpenSIPIt -- the online interoperability testing event for VoIP, SIP and related open-source technologies. This edition, the event featured a hackathon as well, where developers could either try to win some rewards (sponsored by Sippy Software) by completing a specific C/Python coding task or just spend the time … Continue reading Thoughts after Our Participation in OpenSIPIt’03
When comes to the media/RTP side, one of the most common problem to be faced is the so called "one way audio", or "one party does not hear the other one, but vice-versa does". So, lets explore a bit how to troubleshoot such problems. But first, we need to understand how the media/RTP flows are … Continue reading Troubleshooting one way audio calls
The logging is an essential component of the operational side of SIP systems. The troubleshooting, the monitoring, the alarms and more do rely on logs. So the logs are essentials - and to address this, you need to have readable / understandable logs (as format and content). Another challenge when comes to logs is their … Continue reading Smart Logging with OpenSIPS 3.4
Quite a few years have passed since the last set of stress tests were performed on OpenSIPS, with the performance numbers achieved at that time becoming less and less relevant with each new major release. As the number of features has grown, so has the complexity of the codebase -- making the alpha version of … Continue reading Stress-Testing OpenSIPS 3.4 LTS
Our previous post presented SIPssert - an OpenSIPS Testing framework that does conformance testing for VoIP platforms (and not only). In this post we will describe how the OpenSIPS project has already started to benefit from the SIPssert capabilities in order to detect and prevent bugs as well as to avoid regressions and ensure that … Continue reading SIPssert and the journey of testing OpenSIPS
A SIP system/platform consists of multiple components, that interact in various ways to provide complex features (such as call routing, call pickup, registration and authentication, call parking, conferencing, IVRs and others). Each of the component that takes part of the system consists of both a software and its configuration, therefore in order to verify the … Continue reading SIPssert – an OpenSIPS Testing Framework
The OpenSIPS Summit 2023 takes place on US grounds again, after more than 7 years of being anchored on the European continent. The last US edition was Nov 2015, in Austin, TX. How did we decide it? This was one of that kind of quick, group decisions taken actually during the 2022 Summit in Athens. … Continue reading OpenSIPS Summit 2023, T-2 months to launch
The Back-to-back user agent support in OpenSIPS has seen many enhancements and new capabilities in the last couple of release cycles, starting with OpenSIPS 3.1. From clustering/ replication in version 3.1, to dropping the XML control logic in favor of native OpenSIPS scripting in 3.2 and many others, most of these additions made the B2BUA … Continue reading B2BUA Bridging Improvements In OpenSIPS 3.4
While OpenSIPS is mainly a SIP proxy, SIP Back-2-Back capabilities have been supported for a while. But, what about the "end user agent" support in OpenSIPS? Meaning the ability to create and control a Server / Client SIP User Agent, doing all the SIP magic (transactional and dialog level) transparently for you. Considering the integration … Continue reading API driven SIP User-Agent end-point with OpenSIPS 3.4
If almost one year ago we were releasing the first results of the security audit performed by of Enable Security over the OpenSIPS 3.2 code, now is the right time for the full disclosure. What was missing? As per the initial post, we hold back all the information about how to reproduce the crashes. Why? … Continue reading OpenSIPS Security Audit, fully disclosed
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