The application portions of EarthLink SIPshare can built using the source
code contained in lib/fpeer*.jar and lib/fsp*.jar.  Both files contain
a build.xml file.

You will need the supporting jar files in the lib/ subdirectory to
successfully build SIPshare.  This includes the JAIN SIP and NIST jars,
and the Jakarta utilities log4j, regexp, and xerces, and Jason Hunter's
jdom.jar DOM package.