1. DS3-T1 Network Infrastructure & Data Transmission Simon Garrington JBO/Manchester UK Feasibility study of the optical fibre network required to support –Raw data transport from stations to processing nodes –Coherent timing signal to stations –Monitor & Control signals between stations and control nodes

2. Participants ASTRONLOFARCOTS tech.; cost models JBO/ManchesterE-MERLIN, ALMAPhase transfer proto; long link demo; installation IRABESTIntegrated analogue links MPIfREffelsberg fibre linkShort digital link; RFI CSIROxNTDTx protocols; site- specific civils

3. Data Rates LONDON INTERNET EXCHANGE CAPTURES WORLD TITLE REF: 106 DATE: 22/09/04 The UK today claimed top spot in the world Internet communitywith news that the London Internet Exchange (LINX) now transmits more data than any other independent Internet hub on the planet. The announcement boosts government aims to make the UK a world leader in e-commerce. LINX - a not-for-profit organisation - is now passing a record 40 gigabits of data per second through the exchange at peak times.

4. Scope COTS data transmission systems Bespoke data transmission systems Prototype data links 1-400km Low bandwidth M&C network Phase transfer systems Analogue vs Digital Detailed cost equations Civils costs Power distribution

5. Work Breakdown WP-01 Coherent signal distribution and low- bandwidth M&C network WP-02 Data transport system WP-03 Network deployment WP-04 Power distribution

6. WP-01 Phase transfer, M&C 1.1 Prototype phase transfer system (JBO) 1.1.1 Single hop design 1.1.2 15-km prototype 1.1.3 Evaluation on installed 15-50km links 1.1.4 Multihop designs 1.1.5 Multihop prototype 1.2 Low bandwidth COTS network (ASTRON) 1.2.1 Clock distribution 1.2.2 M&C network

7. WP-02 Data Transport System 2.1 COTS technology survey (ASTRON) 2.1.1 Technology inventory & evaluation 2.1.2 Technology bottlenecks 2.1.3 Technology development 2.2 Bespoke transmission equip survey (JBO) 2.2.1 Short links 2.2.2 Intermediate links 2.3.3 Amplified links 2.3.4 International links 2.3 Short span tests (IRA, MPIFR) 2.3.1 Report experience of analogue link [DS6] 2.3.2 Digital/Analog comparison [Boschi PhD] 2.3.3 Analogue VCSEL prototype [In progress] 2.3.4 MPIfR Digital link 2.3.5 RFI suppression 2.4 Long span tests (JBO)

8. WP-03 Network Deployment 3.1 Survey of installation methods (JBO) 3.2 Site specific installation methods (CSIRO) 3.3 Transmission equipment pricing (ASTRON) 3.4 Costing Model (ASTRON)

9. WP-04 Power Requirements & Distribution 4.1 Power Req. & Distribution (ASTRON)

10. Resources

11. Schedule

12. Issues Over budget –But EC keen to fund e-Science aspects of high bandwidth data transport: transmission R&D, distributed processing etc. Overlap in work packages; overlap with DS-6 etc –(reduces risk) Links within DS3 –(input from) DS3-T3 Processing architectures Input to DS-8