Auto process scaling – a cure for load and resources concerns

During all the OpenSIPS trainings, one of the first questions that pops up when talking about configuring OpenSIPS is : "How do I know how many processes should I configure on my OpenSIPS?". And later, this question escalates into the one of the most troubling question for people operating OpenSIPS : "Does my OpenSIPS have … Continue reading Auto process scaling – a cure for load and resources concerns

Gateway between SIP and SMPP messages

While the SIP protocol is one of the most popular protocols used for voice calls, the SMPP (Short Message Peer-to-Peer) is one of the most widely used protocols for sending text messages. Having both of them offered by your service enhances your platform with more compatibility and flexibility. In order for your customers to have … Continue reading Gateway between SIP and SMPP messages

SIP bridging over multiple interfaces

There are scenarios where you need OpenSIPS to route SIP traffic across more than one IP interface. Such a typical scenario is where OpenSIPS is required to perform bridging. The bridging may be between different IP networks (like public versus private, IPv4 versus IPv6) or between different transport protocols for SIP (like UDP versus TCP … Continue reading SIP bridging over multiple interfaces

Handling SIP Redirect Requests in realtime

The SIP redirect mechanism is a simple and straight forward one  - the originally contacted destination indicates, via a 3xx reply, that a different set of destinations should be contacted. The SIP redirect is mainly used for calls (for INVITE requests), even if the RFC3261 does not limit it to that. Usage cases The primary … Continue reading Handling SIP Redirect Requests in realtime

Clustering Presence Services with OpenSIPS 2.4

OpenSIPS 2.4 is all about clustering and SIP presence is an important service that delivers a large variety of functionalities like end-to-end user presence, BLF, SLA and more. We need to consider clustering for presence as much as presence is a service with a large appetite for storage and processing - presence is mainly about … Continue reading Clustering Presence Services with OpenSIPS 2.4

Clustering ongoing calls with OpenSIPS 2.4

Dialog replication in OpenSIPS has been around since version 1.10, when it became clear that sharing real-time data through a database is no longer feasible in a large VoIP platform. Further steps in this direction have been made in 2.2, with the advent of the clusterer module, which manages OpenSIPS instances and their inter-communication. But have we … Continue reading Clustering ongoing calls with OpenSIPS 2.4

Full Anycast support in OpenSIPS 2.4

The advantages of doing Load Balancing and High Availability without any particular requirements from the clients side are starting to make Anycast IPs more and more appealing in the VoIP world. But are you actually using the best out of it? This article describes how you can use OpenSIPS 2.4 to make the best use of … Continue reading Full Anycast support in OpenSIPS 2.4