[Weekly Report]2007.9.15-2007.9.21

1.Read papers and documents:
1.1 RFC 3261(~p42)
1.2 SIP Tutorial by Jiri Kuthan and Dorgham Sisalem
The two documents introduce the basic concepts of SIP. I tried to clarify the header field structure. But still a lot of fields confuse me, like contact.
1.3 "Terminating Telephony Services on the Internet,"Vijay K. Gurbani and Xian-He Sun, Senior Member, IEEE(p1~p3)

2.Install FreeBSD and try to set it a SIP server:
Read the SER manual page.