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June 2005 TNC 2005 1 of 35
Content Delivery Development Activities
Roger Bolam
June 2005 TNC 2005 2 of 35
Content Delivery Activities
• Content Delivery
• Videoconferencing– JVCS onDemand– JVCS Check– Access Grid
• Voice over IP
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Content Delivery
• CDN Architecture Group (streaming)
• Involved in a number of initiatives including– Audio streaming and download– Shaping and strategy for future UK content
delivery
• Monitoring Digital TV developments– Possible networked delivery of Teachers TV
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JVCS-onDemand
• Instant videoconferencing scheduling for up to 48sites, using bespoke booking system
• Voice switched or continuous presence with data and application sharing
• Videoconference sessions can be managed by users
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JVCS-check
• Automated audio and video analysis tool
• Instantly useable through JVCS onDemand
• Improves scalability of JVCS resources
• Promotes good practice for videoconferencing use within JANET community
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Technology
Video Distribution Amplifier
AMX Controller
Audio Out Video Out
Video In
Video In Audio In Video In Serial Port
Tandberg 6000
Network Monitor
Audio Amplifier
Hamlet PLM-1 Overlay Unit
Audio In Video In Video Out
Audio Amplifier
Audio Out
DVD Player
Video Out
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Access Grid Support Centre
• Fully operational service to UK e-Science Videoconferencing community
• 50+ nodes deployed and registered to use service
• Developments in H.323/AG/VRVS conversion facilities and quality assurance testing
• Other developments include improved VIC and RAT and presentation collaboration.
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Videoconferencing Futures
• Videoconference recording and content ingestion
• SIP videoconferencing
• AGSC QA testing
• Fully automated JVCS-IP (using onDemand technology)
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Voice
• Created Voice Advisory Group
• Testing of local and end to end voice on JANET
• JANET community voice survey
• Consider voice models for JANET community
• Monitor regulations
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Traditional Voice Model
PBX ZPBX Y
PSTN
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VoIP Model
VoIP PBX
VoIP PBX IP Network
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Integrated Model
PSTN
VoIP
PSTN
VoIP
PSTN
IP Network
PBXPBX
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How is VoIP being used
• Replacing local telephony switching equipment (PBX) with VoIP solutions
• Utilising PC’s with VoIP software clients• Using IP networks to “backhaul” voice
traffic• VoIP uses packet switched networks
(shared and best efforts), traditional telephony uses circuit switched networks (dedicated and predictable)
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VoIP Today
• Skype 23 million users (15 thousand new users per day)
• VoIP equipment in wide spread in JANET community – inter organisational basis
• Traditional equipment suppliers -Mitel, Avaya, Erricson coming in to marketplace
• Traditional telcos routing voice traffic over IP networks
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VoIP on JANET
• JANET is a best efforts IP network that can support VoIP
• UKERNA is not a telecommunications provider
• Voice traffic is routed over JANET everyday
• Development work continues to ensure people can communicate over JANET in an effective manner
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VoIP and Reguations
• Five EU directives covering; Framework; interconnection and access; data protection; universal service; authorisation
• Ofcom regulations only applicable to certain “types” of VoIP service
• Technology is maturing – regulations are evolving
• VoIP handset is not necessarily a telephone
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Publicly Available Telephone Services
• PATS heavily regulated, ECS are not• PATS are regulated as a telecommunications
provider – 999, operator services and availability criteria
• Number of key criteria define PATS; – a service available to the public– for originating and receiving national and international
phone calls– that provides access to the emergency services; and– through a number or numbers in a national or
international telephone numbering plan
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Why VoIP?
• Potential cost saving in the longer term
• Convergence of data and voice infrastructures
• Feature Rich (locally)
• Voice manufacturers and providers may force the issue (evolve or die)
• Mobility
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VoIP Services?
• Three possible models for VoIP services on JANET
• SIP supported services on JANET, and provide directory services
• Deploy and manage central VoIP switch with tailored clients
• Provide advice and central support for trunking / interconnecting PBX
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VoIP Services?
• Three possible models for VoIP services on JANET
• SIP supported services on JANET, and provide directory services
• Deploy and manage central VoIP switch with tailored clients
• Provide advice and central support for trunking / interconnecting PBX
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JANET
Central Directory Server
PSTN
Oxford Reading
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VoIP Services?
• Three possible models for VoIP services on JANET
• SIP supported services on JANET, and provide directory services
• Provide advice and central support for interconnecting local voice switches
• Deploy and manage central VoIP switch with tailored clients
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JANET
Oxford Reading
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JANET
Bristol
Swansea Reading
Oxford
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VoIP Services?
• Three possible models for VoIP services on JANET
• SIP supported services on JANET, and provide directory services
• Provide advice and central support for trunking / interconnecting PBX
• Deploy and manage central VoIP switch with tailored clients
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JANET
Central JANET Voice Server
Oxford
Reading
Swansea
Bristol
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JANET
Central JANET Voice Server
Oxford
ReadingSwansea
Bristol
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VoIP considerations
• Choice of local VoIP equipment critical• Support for SIP in a standards based
environment (including manufacturer inter-working)
• Addressing and numbering – expandable and standards based (ENUM and e.164)
• PSTN breakout – remains with the telcos (at the moment)
• Where does this technology sit within the organisation? (telephony / data)
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Contact Details
Roger Bolam
Arron Bowley
http://www.ja.net/development
