YXA is a SIP stack and a set of SIP server applications written in Erlang/OTP. The SIP stack is RFC3261 compliant. Among the features implemented are SIP registrar, SIP router, forking, CPL, IPv6, TLS, ENUM, PSTN gateway access control and modular user database backends. The main goal of the project is to create a robust SIP server platform that can scale to tens of thousands of users, be interoperable through standards compliance, and still have short time-to-market for new features due to the use of a high level language.
Release Notes: Since the last stable release, YXA has gotten a number of new features, such as GRUU, Outbound, and event server. Also, a lot of stability and overall maturity was added.
Release Notes: This release has a few bugfixes, but most notably all documentation has been converted to edoc format.
Release Notes: Various bugs in the draft-Outbound implementations have been fixed. The pstnproxy's application logic has been updated to suit some real deployment scenarios. The test framework has been greatly enhanced.
Release Notes: Many bugfixes and code cleanups were made.
Release Notes: The configuration process has been improved, and Erlang/OTP R11B-1 is now the required version. Various small bugs have been fixed.