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.
License: BSD License (original)
Changes:
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.