Comp 346/488 - Intro to Telecommunications

Peter Dordal, Loyola Univ Chicago Dept of  Computer Science. 

MWF 1:40-2:30, in 25EP-L09.

Text: Data and Computer Communications, William Stallings, Seventh Edition, Prentice-Hall, 2004, ISBN 0-13-100681-9

General course groundrules are here. Exams will count for between 70% to 80% of your grade, with homework and programs making up the rest. The midterm is scheduled for Monday, March 21 (changed from March 18!); the final will be Tuesday, May 10, at 1:45 (the time from the schedule).

Here is a nice online review of leaky bucket filters (which we will cover at the end of the semester), at; that site uses lambda and L where I used T and tau.

Midterm study guide. Answers are here.

Final exam study guide, now with additional problems.
Answers are here.

Here is my brief doco on spread spectrum, for those missing the 7th edition's chapter 9 on this.

More documentation

Erlang project

Here is the preliminary version of the Erlang calculation project. It is likely that the analyses will be updated, though the models themselves won't change much. (But note that in Model 3 you measure waiting times rather than blocking times.)

Course Outline:

This is approximate; see study guide for more specific information.

What is telecommunications? How is it different from data communications?
Characteristics of voice traffic: minimal delay, even smaller variation in delay, reservations
POTS; circuit switching
Connecting exchanges
Long lines, physical transmission issues
Digitization; encoding of voice
TDM, FDM (note that there are some subtle encoding issues)
Basics of packet switching
Basics of routing
Brief review of TCP/IP

Packet switching again
Congestion management
SONET, optical fiber
Frame Relay, ISDN
Cellular phones

Chapters in book to be read are listed in parenthesis.

1. Introduction, OSI Model, Protocols and Architecture (Ch. 1,Ch. 2)

2. Data Transmission (Ch. 3)

3. Transmission Media (Ch. 4)

4. Data Encoding (Ch.  5) (new)

5. Data Communications Interface (Ch. 6)

6. Data Link Control (Ch. 7)

7. Multiplexing (Ch. 8)


8. Circuit Switching (Ch. 9)

9. Packet Switching (Ch. 10)

10. ATM and Frame Relay (Ch. 11)

11. Congestion Control in Data Networks (Ch. 12)

12. ISDN (Appendix A)