PSARC 2008/007 SIP Statistics And Logging
6496355 SIP stack should provide Call Tracing, logging and stat counters

6480199 header files in libsip needs clean-up
6481951 SIP timer doesn't schedule timeouts accurately
6484530 Memory leak in deleting partial dialogs

PSARC 2006/402 SIP Library Integration
6461142 Integrate SIP in Solaris