Lecture Plan

Introduction
- Course arrangement
- Set the context of VoIP, both technically and economically
VoIP details
- Session Initiation Protocol (SIP)
- Session Description Protocol (SDP)
- DNS and ENUM
Mobility
Service Creation
User preferences
Security, NATs, and Firewalls
SIP Telephony
Conferencing
Mixed Internet - PSTN services
AAA and QoS
More than just voice!

Transcript

[slide20] The basic lecture plan is, we talked about the course arrangements. Now we're going to set the context for VoIP. We're going to look at both the technical and the economic context. Because the two are very coupled, and we can't ignore the economics. Then we'll talk about the details of VoIP, starting with SIP and SDP. And then we'll talk about DNS, and something called ENUM, which is an ability to map from traditional telephoning numbers to VoIP URLs. Then we'll talk about mobility, service creation, user preferences, security, SIP telephoning, conferencing, mixed services. And of course, if you're a commercial operator, an important thing is AAA, right? Authentication, authorization, and accounting. You want to get paid for it, and you want to only deliver the services to those [who pay]. And coupled with that is the important question about quality of service. And there are many people who think that you're going to be able to charge more money if you provide higher quality of service. We'll see that in practice, it's really very hard. Because to actually make the quality of service really bad costs extra. Right? Which is counterproductive. You don't want to have something where you really have to work hard to disrupt it. And we'll see it's actually a lot more than just voice. There are many, many other services that can use these protocols that we think of as voice over IP.