The OpenSIPS 2.3 version is built around the integration concept - the OpenSIPS ability to integrate and work together in all possible means with other projects, protocols, systems or concepts.
Why is integration so important to end up being the main tag of a major release? Well, everybody in the VoIP world is operating VoIP platforms/systems – and these are more than SIP Engines (as OpenSIPS is). Indeed, the SIP Engine is the core and most important part of the platform, but to build something usable and useful, you need additional components into your platform like CDR/billing engines, monitoring and tracing tools, data backends, non-SIP trunking or more specialized SIP engines. Shortly you need your SIP Engine (OpenSIPS, of course) to be able to easily integrate with all these components.
The success of this release - in terms of achieving its integration goal - was strongly weighted by the collaboration with the teams of the partner projects, like SIPCapture, FreeSWITCH or CGRates. A collaboration in terms of ideas, brainstorming, solutions and of course, work. A collaboration that resulted in solutions and benefits for all the involved communities.
This OpenSIPS 2.3 release is the star of OpenSIPS Summit in Amsterdam, May 2017 - beside presentations and workshops around the new cool things in this version, OpenSIPS 2.3 will also reach its maturity / General Availability during this event.
The integration with the SIPCapture engine was a hot topic again. The work in this area focused in adding two new concepts (both on OpenSIPS and SIPCapture sides) when comes to capturing:
This topic is more in depth covered in this recent blog post.
As a powerful Class5 Engine, FreeSWITCH is the perfect complementary tool for OpenSIPS. Based on the collaboration with the FreeSWITCH team, several integration capabilities found their way in OpenSIPS 2.3:
SIP without billing is like a dinner without a good wine. While OpenSIPS does a great job for SIP, it often needs a billing partner to work with. CGRates is an open-source rating engine used for carrier-grade, multi-tenant, real-time billing. It is able to do both postpaid and prepaid rating for multiple concurrent sessions with different balance units (eg: Monetary, SMS, Internet Traffic). CGRateS can also export accurate CDRs in various formats.
Even if a very primitive and rudimentary integration with CGRates was possible with the older OpenSIPS versions, now, with OpenSIPS 2.3, thanks to the CGRates team, there is a built-in integration support available - this exposes all the powerful billing capabilities of CGRates, with a very simple and efficient usage from OpenSIPS side , as it is shown in this blog post.
Or how to do SIP-I to SIP translation or ISUP inspection. 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).
A detailed blog post covers the problems related to SIP-I and how OpenSIPS 2.3 is addressing them, in order to be able to terminate to your SIP end-points the traffic originated via SIP-I trunks.
The Event-based Routing engine is a new tool that allows you to implement more complex SIP scenarios by mixing multiple and various elements (calls, registrations, RTP events, B2B sessions) that are involved and correlated at different moments in time. And some examples of such scenarios:
The EBR engine is the way of performing SIP routing based on events (generated by the Event Interface). And this is a new mechanism provided by OpenSIPS 2.3 to address the complex processing problems. More details on EBR engine and how to use it for implementing a Push-Notification scenario may be found in this original release post.
There is a long list of thinks that were added or improved in OpenSIPS 2.3, and sticking to the most relevant ones, we need to mention:
But the full list of goodies offered by OpenSIPS 2.3 (and a more technical one too), together with migration instructions, can be found on the OpenSIPS 2.3 release notes page.