CS 598 - Internet Telephony

Summer 2008

Table of Contents

Course Description

This is a special-topics course on Internet Telephony. The prerequisite for this class are Operating Systems and Networking. The course is divided into six two-week sections; see the syllabus for details. The class meets Tuesdays and Thursdays from 4:00 p.m. to 5:50 p.m. in Howard Hall 524 C-1.


This course has three objectives. By the end of the semester, you should have an understanding of


R. Clayton, rclayton@monmouth.edu. Office hours are from 3 to 4 p.m. on Tuesdays and Thursdays in HH C1; see the schedule for details.


The usual grade ranges are in effect:
95 A
90 A-<95
83.3B <86.6
80 B-<83.3
73.3C <76.6
70 C-<73.3
All grades are kept with one digit of precision to the right of the decimal point and 0.05 rounded up. No grades are adjusted to a curve; that means, for example, that 89.9 is always a B+, never an A-.


There are six quizzes, one each section on Tuesdays (except the last quiz, which is on the final Thursday); see the syllabus for the schedule. Quizzes are given in class, and are closed book with no notes; calculators and computers will not be necessary. The quizzes are cumulative, covering everything taught up to and including the class before the quiz. Quizzes should take no more than an hour to complete, and are given in the first hour of class. Quiz answers will be made available off the syllabus. There are no mid-terms or finals.


Each student should pick one or two papers (depending on class size and time) of interest having to do with Internet Telephony and lead a presentation and class discussion about each paper. Here are some guildelines for presenting a paper.


It would be nice if there were some programming assignments, but at the moment it's unclear what they could be. If there are some programming assignments, the grades for the assignments will, perhaps, substitute for low quiz or presentation grades.

Final Grade

The final grade is the weighted sum of quiz-, presentation grades with the weights


Each individual quiz and presentation grade average is a straight, unweighted average.



There is no textbook for the class (or rather, there are many textbooks for this class, each one useful only in parts). Reading for this course will come from lecture notes and papers in the literature. See the syllabus for details.

An annotated bibliography of books and papers related to Internet telephony.


Feel free to send e-mail to rclayton@monmouth.edu . Unless I warn you beforehand, I'll usually respond within a couple of hours during the usual work days; if I don't respond within a day, resend the message.

Mail relevant to the class are stored in a hyper-mail archive. If your message is of general interest to the class, I'll store it, suitably stripped of identification and along with my answer, in the archive.

Home page

If you're reading this on paper, you can find the class home page at http://www.monmouth.edu/rclayton/web-pages/u08-598/index.html. I'll make the class notes, assignments, and quizzes available off the syllabus; you should get in the habit of checking the syllabus regularly.



People who need assistance or accommodations above and beyond what is usually provided in class should contact the University's ADA/504 coordinator to get those needs met. See the Disability Services page for more details.


I have no class attendance policy; you may attend class or not as you see fit. However, I hold you responsible for knowing everything that goes on in class; "I wasn't in class for that." is not an acceptable excuse for a wrong answer, or for giving no answer at all.

My attendance policy applies only to lecture attendance; it does not apply to other kinds of attendance which may be required for the course. Repeated failures to meet the attendance expectations set for tests, meetings, projects, labs or other forms of course work will have a bad influence on your grade.


I deal with suspected cheating by failing first and asking questions later. Although cheating has many forms, I generally consider cheating to be any attempt to claim someone else's work as your own; also, I consider both the provider and the user of the work guilty of cheating. See the chapters on Academic Information and the Student Code of Conduct in the Student Handbook for more details.

Complaining about Grades

I recognize and encourage a student's sacred right to complain about their grade. There are, however, a few rules under which such complaining should take place, and those students who don't follow the rules will be less successful in their complaints than those students who do follow the rules.

First, the only complaint that matters is that something got marked wrong when it was actually right. When you come to complain, be prepared to present, in explicit detail, what it is you did and why you think it's right.

Second, complaints about a particular test or assignment are only valid until the next test or assignment is due; after that point the book is permanently closed on all previous test or assignment grades.

Late Assignments

Assignments must be turned in by their due date; assignments turned in after their due date are late. You should contact me as soon as possible if you need to negotiate a due-date extension. The longer you wait to negotiate, the less likely it is you'll be successful; in particular, you have almost no chance of getting an extension if you try for one the day before the due date, and you have no chance of getting an extention on the due date.

A late assignment is penalized five points a day for each day it's late. I use a 24-hour clock running from midnight to midnight to measure days; note this means that an assignment handed in the day after it's due is penalized ten points: five for the day it was due and five for the next day.

Missing Tests

There may occasionally be a conflict between taking a test and doing something else, particularly among those working full time. If you're going to be out of town, or on jury duty, or whatever, on a test day, let me know beforehand and we'll discuss a make-up test.

A make-up test must be scheduled to be taken by the date of the test following the missed test (or the final exam if you miss the last test). If a missed test is not made up by the time of the next test, you get a zero for the missed test.

There will be only one make up given per missed test. If more than one person misses the same test, those people will have to coordinate among themselves to pick a mutually agreeable date for the make up.


The IETF Working Group on Internet Telephony.

The VoIP Wiki.

The GNU Gatekeeper project, a GPL licensed H.323 implementation.

The GNU Telephony project, a part of the GNU Telecom subsystem.

Watch RTP and RTCP traffic with tcpdump.

This page last modified on 18 June 2008.