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TCOM 519/539 
VoIP and Advanced VoIP
Fall 2008

 

Tuesday, from 7:20 pm - 10:00 pm
Innovation Hall, Room 133

 

 

Course Description

 

ANNOUNCMENTS

 

Welcome to TCOM 519/539!

 

Please review TCP/IP basics!

 

First Class Announcements

 

TESTS

 

Test 2 Questions

 

Test 2 Solutions

 

INSTRUCTOR INFO

 

Instructor: Dragan Hrnjez

E-mail: dhrnjez@gmu.edu

Office Hours: I prefer to handle as much by e-mail as possible. Other arrangements can be made.

 

TA INFO

 

TA: Srikanth Akurati

E-mail: sakurati@gmu.edu

Office Hours: Wednesdays, 16:00 – 19:00 PM

Location: Johnson Center, Room 10 C

 

 

REQUIRED TEXTBOOK

 

Voice Over IP Fundamentals, Cisco Press, Jonathan Davidson, James Peters, Brian Gracely, CiscoPress, 2nd Edition, 2006.

 

Supplemental Readings: Discussed during the first lecture.

 

GRADING POLICY

 

TCOM 519:

 

 

TCOM 539:

 

Test 1

10%

 

Homework

10%

Test 2

30%

 

Project

40%

Final exam

60%

 

Final exam

50%

 

 

PROPOSED SCHADULE/SYLLABUS*

 

Week -  Date

Topics

File Link

1 -  Aug 26

Introduction to Voice and Voice Transmission Technologies: Voice characteristics and digitalization. CODEC functionality. Traditional circuit switched equipment and networks used for telephony. Signaling basics. Potential use-cases for VoIP deployments (benefits/challenges).

 

Notes #1

 

Tel_101

2 -  Sep 2

Concept of Transporting Voice over a Packet Switched Network: IP tutorial, RTP, RTCP and RTSP protocols such as packet format, functionality and features, design criteria.

(Test 1: 30 min)


Notes #2

3 -  Sep 9

Voice over IP Decomposition: Human voice and coding techniques, compression. Factors that affect VoIP quality: delay, jitter, packet loss, echo. Quality metrics for VoIP.

 

Notes #3

4 -  Sep 16

Intro to VoIP Signaling Protocols: Overview. H.323 signaling protocol: format and inter-workings.


Notes #4

5 – Sep 23

SIP Signaling Protocol: Architecture, format and inter-workings.

(Test 2: 80 min)

 

Notes #5

6 -  Sep 30

 SS7 Signaling Protocol: Architecture, format and inter-workings (H.323, SIP and ISUP (SS7) signaling protocols).

 

Notes #6

7 – Oct 7

Lab from 8:40 till 10:00

Introduction into Voice over IP Network Planning: Traffic analysis and forecasting (intro), simulation and modeling techniques, VoIP performance monitoring. Lab overview.


Notes #7

8 -  Oct 14

 

NO CLASS: Monday classes/labs meet Tuesday. Tuesday classes do not meet this week.



9 – Oct 21

Final Exam – Comprehensive

 

1 -  Oct 28 -

TCOM 539 Starts

The Softswitch Architecture: Interoperability of different signaling protocols (H.323, SIP, SS7) using Softswitches, Applications of Softswitches in a carrier grade VoIP environment.



2 -  Nov 4

Voice over IP Network Planning and Design: Traffic analysis and forecasting (advanced), dial plans, vendor selection criteria for LAN and WAN deployments.

 

3 – Nov 11

Lab from 8:40 till 10:00

VoIP Quality and QoS: A thorough explanation of QoS components, protocols and trade-offs. RSVP, Diffserv, MPLS and 801.2q protocols are covered in details in terms packet format, features and functions and their pros and cons.

 

 

4 -  Nov 18

VoIP Quality QoS (continued): A thorough explanation of QoS components, protocols and trade-offs. RSVP, Diffserv and MPLS protocols are covered in details in terms packet format, features and functions and their pros and cons.

 

 

 

5 – Nov 25

Lab from 8:40 till 10:00

VoIP Security: Vulnerabilities, security requirements and technologies. NAT/Firewall considerations. VoIP encryption analysis.

 

 

5 -  Dec 1

VoIP Applications and Services: Use cases, soft phones, WiFi phones, collaboration and presence. Wireless VoIP. Fax over IP. Concerns and challenges. Way ahead.

 

 

6 -  Dec 8

Final Exam – Project Submission

 

 

* This schedule is tentative and there might be slight adjustments in the workflow. Those, if any, will be announced and discussed during the course.

 

 

USEFUL LINKS

 

  • General Information

http://www.fcc.gov/voip/

http://www.voip-news.com/

http://www.voip-info.org/

http://www.voip-magazine.com/

http://www.businessvoipreport.com/

http://telegeography.com/

 

  • H.323 Information

http://www.packetizer.com/voip/h323/doc_status.html

 

  • SIP Information

http://www.cs.columbia.edu/sip/

http://www.cs.columbia.edu/sip/drafts.html

http://sipfoundry.org/

http://www.sipforum.org/

 

  • CODEC & MOS & Traffic Calculators

http://www.voip-calculator.com/calculator/lipb/

http://davidwall.com/MOSCalc.htm

http://www.erlang.com/calculator/index.htm/

 

  • Voice Activity Detection – VAD

    http://www.acm.org/crossroads/xrds13-4/voice_detection.html/

 

  • Voice over IP Security

http://www.voipsa.org/

 

  • ASN.1 Resources

http://www.snmplink.org/snmpresource/asn1/#1

 

  • ENUM Resources

http://www.itu.int/ITU-T/inr/enum/

http://www.enumf.org/home.html

http://www.ripe.net/enum/