Peers is a minimalist SIP User-Agent written in java, hosted on sourceforge. It requires a java runtime environment.
It has been tested on linux (debian), windows (7, xp sp2, xp sp3) and mac os (10.6) against X-Lite, OpenWengo, Linphone and Ekiga softphones, and it has been tested with Sipp. Tests have been performed with many IPBXs Asterisk, freepbx, Cirpack, OXE, Avaya, but also with pure proxy registrars: OpenSIPS.
The codec employed is G711 ulaw and alaw. DTMF are supported (rfc 4733). Peers has no external library dependency, it just leverages standard java apis.
SIP stack *does not* rely on NIST SIP stack.
Provisional responses are managed since version 0.2.
REGISTER and Digest authentication are implemented since release 0.3.
Challenges on INVITEs and re-INVITEs are managed since release 0.3.1.
New GUI since release 0.4, no manual configuration file modification necessary.
Challenge on BYE requests are supported since version 0.4.1.