There is a new release for SIP SIMPLE client SDK available, version 0.15.1 with support for Microsoft Windows (XP, Vista and 7).

Installation instructions are available at:

http://sipsimpleclient.com/browser/docs/Install.windows

Additional, there are  bug fixes common for all platforms.

python-sipsimple (0.15.1) unstable; urgency=low

 * Added support for Microsoft Windows
 * Added PJSIP patch for adaptive G722 bitshifting
 * Improved the initialization of the TLS options when starting the Engine
 * Added support for terminating sessions in SessionManager
 * Don't enable bonjour account if bonjour support is not detected
 * Modified account matching rule for incoming sessions to ignore IP address
 * Added thread attribute to SIPApplication as the Thread the reactor runs in
 * Improved synchronization of the audio devices with corresponding entries