nig Schulzrinne Appendix time surfing through this Web page to get familiar with it. All the informa- tion that one needs about SIP can be found here. Of special interest is the FAQ section. Any newcomer to SIP who has any question and is thinking of posting a message to the general information mailing list should first check the FAQ section. The most common questions with their answers are gathered here. Checking the FAQs first before post- ing questions to a mailing list does not just save some bandwidth. It also saves time to the engineers that are subscribed to that mailing list in order to help people to get familiar with the protocol. They very much appreciate not having to answer the same question several times. Dean Willis' Web Pages A link to Dean Willis' Web page can be found in the SIP working group offi- cial Web page at the IETF. This additional SIP Web page (http://www. soft- armor.com/sipwg) is maintained by Dean Willis, co-chairman of the SIP working group. This Web page (Figure A-3) deals with the administrations of the SIP working group. It has information about the small design teams, groups of people that work together to resolve a specific issue, and about the final call calendar. The final call calendar is very important because by looking at it, we can know when an Internet draft will become an RFC. This is the best place to check the maturity of different extensions. When a draft enters in its final call, the working group has a last chance to comment on it before the work- ing group sends the draft to the IESG. Once the draft is submitted to the IESG, the area directors will decide if it can become an RFC or if the work- ing group needs to continue working on it longer. Dean Willis also maintains another Web page (Figure A-4) at http://www. softarmor.com/sipping. This Web page contains work leading to specify frameworks and requirements for new SIP-based applications. There is also a last call calendar with the status of all the related Internet drafts. Appendix Session Initiation Protoco