1 broadband_connection@home for students and employees tom koppen director computing center terena...
TRANSCRIPT
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broadband_connection@home
for students and employeesTom Koppen
director computing center
TERENA Networking Conference 2000Lisbon, 22-25 May
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And now something totally different
• Different accent
• Not a technical expert
• Case study on home connection for students
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University of Twente
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University of Twente
• 2000 students living on campus• 4000 students living in town• 2500 staff living in town
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University of Twente
• technical and social studies• telematics, chip technology,
process engineering, biomedical engineering educational technology
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The network on campus
• Within buildings: switched Fast Ethernet
• Between buildings: Gigabit Ethernet
• SURFnet:• 1994: 4 Mbps• 1997: 34 Mbps• 1999: 155 Mbps• 2000: 1 Gbps• 2002: 20 Gbps
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Why connection at home?
• “ICT in education”– Intranet– Internet– File serving– Communication
• Education free of time
• Education free of place
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Why broadband connection?
• Course Management Systems
• Streaming video
• Multicast
• Videoconferencing
• Collaborative workspace
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1992: dial back
• Own modem pool• For file-transfer and internal e-mail• 14.4 kbps, later 28.8 kbps• In the beginning: free of charge• Later: 300 minutes/month free
• Results:– Number of accounts slowly growing– Users want to be “always on”
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1994: CAMPUSnet
• all 2000 student rooms on campus
• 10 Mbps shared Ethernet
• Fee: € 7 per month
• Also: free e-mail account for all students
• Result: from 50 % subscription 100 %
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1996: ISDN
• Faster: 64 or 128 kbps
• Phone calls possible while surfing
• More used by staff then by students
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1998: Dial-in
• Special contract with cable company
• PSTN and ISDN
• Free of charge (except phone pulses)
• Local phone tariff everywhere in NL
• Possible by competition in telecom world
• All students and staff an account
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1999: update CAMPUSnet
• 50 hubs replaced by switches• Faster:
10 Mbps shared 100 Mbps switched• Safer: no sniffling anymore• Paid by raising fee from € 7 to € 10
• Conclusion: once you possess the localloop, updating the technology is affordable.
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April 2000: cable modems
• Special arrangement with cable company
• Faster: maximum 0.5 Mbps
• Authentication by UT
• Fixed IP-numbers: intranet access
• At last a flat fee: € 19
• Sharing the connection permitted
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July 2000: ADSL
• Access Pilot with GigaSURF• Partner: datacom company Casene• Concentrators in 6 cities in the region• Minimum 2 Mbps 8 Mbps• Flat fee: € 36
• Results: earlier at our disposal, much more bandwidth, more certainty, a lot cheaper.
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Menu à la carte
Dial-in PSTN 56 kbps phone pulses
Dial-in ISDN 64 or 128 kbps+ € 9 subscription
phone pulses
Cable modem max 0.5 Mbps € 19
ADSL 2 - 8 Mbps € 38
CAMPUSnet 100 Mbps € 10
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200X: wireless
• Wireless LAN’s
• GPRS
• UMTS
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Internet traffic during the day
Twente
Big city
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Prognosis
0
500
1000
1500
2000
2500
3000
3500
4000
1999 2000 2002
PSTNISDN
cablemodem
ADSL
FastEthernet
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How to lower costs and improve quality• The telco only for the local loop• To be done within university:
– Authentication– Access to Internet– E-mail and other network services – Helpdesk– Administration and billing
• Keep administration simple
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Conclusion
The connections to the homes commercial ISP’s offer are not fast enough for a reasonable price.
Universities should take responsibility for broadband Internet access of their students, if they have any ambition with “ICT in education”.
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