Transcript DFN - Indico

A Videoconferencing Service for
the German Network for
Research and Education “DFN”
CSMM Working Group Meeting 0
12 February 2004, CERN
Gisela Maiss, Klaus Ullmann - DFN Germany
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Content
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Application Scenarios and Demands
Architecture
DFNVC Service
Address Specification
Utilisation
Further Plans
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DFNVC: Application Scenarios
• Working group meetings: Participants are
scientific members of working groups located at
different institutions, meetings on a regular or
spontaneous basis
• Regular meetings of university directors to
save time and money
• Attendance of students at lectures and
participation in seminars from their homecomputer
• Discussion of research results over a video
conference, possibility to invite external experts
who join the conference via telephone
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DFNVC: Demands
• From the user point of view
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Reliable management of the MCU(s)
Ad-hoc conferences
Video quality: at least 384 Kbit/s (per user)
Audio quality: G.722
T.120 for application sharing
Continuous Presence, Transcoding
Support for all configuration and operational
problems (e.g. firewall problems)
– Reservation of rooms (and MCU ports),
scheduling of conferences
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DFNVC: Service Architecture
Organisation without
own zone
Organisation according to scenario 3
User
VC system
Organisation according to scenario 1
Organisation according to scenario 2
Organisation
with own zone
User
VC system
User
VC system
GK
VC Portal
Organisation without
own zone
User
VC system
MCU (s)
DCS
World
GK
Country
GK
DFN
GK
ISDN User
VC system
GW to
ISDN users
Zone DFN
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DFNVC: Service Model
• Who may use the service?
– Users in DFN organisations and users in national /
international partner organisations (guests)
• How to use the service
– Organisation contracts with DFN and pays flat
charge according to the bandwidth of the
DFNInternet connection
– 3 technical usage scenarios:
* Computing centres administer their users via own
gatekeeper (GK) (local administrator), user support
from local administrators
* Users register with the gatekeeper of another
organization or
* with the DFN-GK and get direct support from DFN
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DFNVC: Operational Model
• DFN - responsible for
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Management of all technical components
Setting up of a dial plan for the GK structure
Provision of the VC portal
Training courses for local administrators
Hotline, mailing lists, documentations, charging
• Participating Organisations - responsible for
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Installation of a technical administrator
Attendance in training courses
Choice of VC end systems & operation of a gatekeeper
Training & First level support for their users
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DFNVC: Service Components
• Same equipment in two locations (Berlin and
Stuttgart)
• MCUs:
– Premium Equipment:
• per location 2 Radvision MCU-60/G.722
with TCM 30 Audio Transcoder Board
-> 240 Ports
• per location 2 Radvision MVP 30 Video Boards
– Standard Equipment:
• per location 1 Radvision MCU-100
-> 200 Ports
• Gatekeeper, Gateways and DCS
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location
location
location
location
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Gatekeeper Radvision ECS 2.0
Gatekeeper GNU-GK 2.0.2
Radvision Gateway gw-P20
Radvision Data Collaboration System
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DFNVC: Service Features
• The service
– allows ad hoc conferences
– offers Dial-In for H.320-systems
– supports preparation and initiation of
conferences (self dialing)
– provides a Global Dialing Scheme
– provides test results and descriptions for VC
systems
– offers hotline and training courses for
administrators
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DFNVC: Address Specification (I)
• Adaption of DFNVC dialplan to E.164
(ITU-Standard for international numbering plan,
country prefixes, Germany: 0049)
• Allocation of new numbers to gatekeepers and
VC devices (according to telephone numbering
plan)
• Change-over up to April2004
• Migration: devices that are not adapted to the
new plan could be reached by their old number
• New devices get an E.164 number
Consistent addressing for VC and VoIP
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DFNVC: Address Specification (II)
Global Dialing Scheme (GDS)
Jürgen
Detlef
Egon
Tyler
-> Detlef
-> Egon
-> Tyler
-> Jürgen
0049-351-463-35653
0031-30-2305-367
001-129-71004
0049-711-633142-41
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DFNVC: Degree of utilization
• Participants in the production service
– contracts signed with ~ 160 organisations
and institutes
– ongoing negotiations with ~ 100 further
organisations
– nearly 50% with own gatekeeper
– nearly complete VC connectivity
– cost recovery is achieved
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DFNVC: Further Plans
• Examination of system security and service
quality
• Integration of new functions (e.g. streaming,
VoIP-structure, SIP based signalisation)
• Service administration via LDAP (H.350)
• Reservation / Meeting management
system, e.g.
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reservation system for vc rooms
using mail with unified calender format
project definition phase
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DFNVC: Summary
Links for interested organisations
– Introduction into the service
• VC portal http://www.vc.dfn.de
– Procurement of VC systems and gatekeeper
• Consulting via hotline and have a look at
http://vcc.urz.tu-dresden.de/vc-systeme/
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