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April 25,2007: VoIP Roundtable 4: What's New in IMS?
The fourth VoIP Roundtable of the 2006-2007 academic year took place on
April 25, 2007. Jack Kozik, Chief Technology Officer and Director of
Architecture, IMS Business Division, Alcatel-Lucent discussed developments
in the IP Multimedia Subsystem (IMS). Topics included: A-IMS, Resource
Management, QoS, and Presence. Benefits of the IMS service architecture to
the end-user were considered as were the technical choices that support
them. The audience contributed many interesting questions and observations,
and the discussion continued well into the morning. You can view the video
at the link below.
Link to Video
April 10, 2007: VoIP Students' Projects Presentations and Demonstrations
Students in the VoIP courses at the IIT Rice Campus presented and demonstrated their research projects at an IEEE Communications Society meeting, Tuesday evening, April 10. Poster sessions by students in the Telecomunications and Data Communications classes were also on display and the student teams discussed their research with members of the IEEE and the technical community.
Presenters
Recent graduates describe their invention - an appliance to provide location information for transport to an E911 PSAP
Demonstrations in the Lab
P2P SIP poster session
Zfone poster session
Project: Secure, Mobile VoIP Calls: The IP Multimedia Subsystem (IMS) in Action
The IMS architecture supports the secure integration of fixed and mobile communications. The team built an IMS test bed on which external callers get secure access to the protected network and began to characterize the performance of the network describing the message exchanges and performance parameters.
Presentation slides
Project: Emergency Calls on VoIP: Toward a Special Quality Metric
Calls to an E 911 PSAP contain important information - including background noises - that could be lost if the audio quality is poor. The student created a set of sample calls and sent these samples over different combinations of networks and codecs. One goal of this work is to develop a set of audio requirements for 911 calls. The audience shared many useful suggestions and observations.
Presentation slides
Project: SIP-IIT: IIT VoIP lab hosts SIP-based telephone service
The SIP-IIT team has created a SIP-based phone service for students in the VoIP and Telecommunications classes. The student developers explained their architectural choices – the use and configuration of the Asterisk servers and media gateways, the selection of soft-phones and the need for – and operation - of DNS servers. SIP-IIT functions were demonstrated in the lab.
Presenters
Recent graduates describe their invention - an appliance to provide location information for transport to an E911 PSAP
Presentation slides
Project: STUN Server Development: Working your way around a NAT
VoIP Applications that run behind Network Address Translators (NATs) often have problems communicating with peers outside the NAT. The STUN protocol was designed to literally work around these problems. The challenge to the student was to create IITs’s own STUN server, compliant with the new BEHAVE draft and capable of being incorporated into the VoIP lab’s test beds. This semester the student downloaded a free-ware STUN application and studied its behavior. This project is in its first semester and will be ongoing throughout the summer and the next school year.
Presentation slides
Posters and Short Topics:
Poster Session: ZFone implementation of ZRTP: In-band key exchange supports SRTP
The student team discussed their study of the ZRTP protocol and its implementation in the Zfone. ZRTP enables the in-band exchange of keys that are then used for a secure RTP (SRTP) communication. A study of the performance of the Zfone is ongoing in the lab.
Poster Session: P2P SIP Network: SIP-DHT study
The student team described the operation of this freely downloadable P2P SIP network implementation, showing protocol traces of the communication between the peer nodes..
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February 24, 2007: Engineers Week 2007
Each year IIT Rice Campus sponsors Engineers Week activities including a
Saturday day-long engineering festival aimed at school-age children and
their parents. Complete with interactive exhibits, goodies and engineers
from all discplines, this annual event is a great opportunity for children
to learn about what engineers, technologists and scientists do and how our
work impacts their lives and communities. IIT students in the VoIP and
Telecom classes sponsored a VoIPirates event, showing the children how to
make audio/video calls using VoIP technologies - and how vulnerable those
calls are to the pirates who lurk on the Internet.
Student eweek volunteers
VoIP students demonstrate VoIP to guests.
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February 14, 2007: VoIP Roundtable 3: P2P SIP
The third VoIP Roundtable Discsusion of the 2006-2007 academic year took place on
February 14, 2007. Christian Stegh of Avaya introduced the technologies
behind P2P SIP networks and covered self-organizing overlay networks, the
peer discovery process, and how sessions are managed.
Video of webcast
Presentation slides
Related article:"Industry Gets Serious about P2P Telephony"
Christian Stegh discusses features of Avaya P2P SIP phones donated to the VoIP lab.
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December 6, 2006: VoIP Roundtable 2: Case Study of Large Scale VoIP Deployment
The second VoIP Roundtable of the academic year 2006-2007 took place on December 6,
2006. Josh Robbins of Geckotech, spoke on the pros and cons of Hosted vs.
Enterprise VoIP solutions, making a strong case for why the small to midsize
business should choose hosted solutions. A case study of a large scale hosted solution is presented, including the enterprise requirements and how the hosted solution met them.
Presentation Slides
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October 26 and 27, 2006: IIT 2nd Annual VoIP Conference and Workshop
This two day event featured three tracks geared respectively to Enterprise,
Service Providers, and the Development community. VoIP Security, E911 on
VoIP networks, IMS for Fixed Mobile Convergence, VoIP Test STrategies, and
Peer to peer technologies, were a few of the many topics addressed in
individual talks, panel discussions and keynote addresses.
Thursday's keynote address was by Philip Zimmermann, the inventor of Pretty Good
Privacy (PGP) and the Zfone. He discussed the topic “ZRTP: A Disruptive
Approach to Securing VoIP” On Friday, a keynote panel of industry leaders,
including John Waclawsky of Motorola, Jack Kozik of Lucent, Enrico Marocco
of Telecom Italia and Arun Handa of IntelliNet discussed “SIP, IMS, Peer to
Peer: Moving towards a new industry paradigm.
Half hour breaks between sessions allow attendees to visit the booths that
line the corridors where vendors and service providers display their
products and services and discuss offerings and opportunities. This years'
event featured a social hour with live jzz at the end of the first day, and
a tour of the VoIP lab and its projects at the end of the second. This
event was the birth place of several development projects between
participating vendors and we look forward to reporting on their progress in
the months ahead.
Keynote speaker Phil Zimmermann discusses the ZRTP and the Zfone.
Social hour with wine and cheese and a live jazz band provided networking opportunities.
Exhibitors’ booths are center stage during conference breaks.
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