Layer 10's Paul Brooks at NBN: Rebooted
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Transcript of Layer 10's Paul Brooks at NBN: Rebooted
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Several VDSL2 Bandplans
• Annex A (US): 7 plans with 9 variations
• G.993.2 02/2006:
• Annex B (Euro): 6 x ‘997’ plans and 7 x ‘998’ plans up to 12 MHz
• Annex C (Japan): 1 band plan over ISDN, up to 30 MHz
• Annexes D, E, F, G, H, I, J, K all “for further study”
But wait…there’s more…
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Several Bandplans…(2)
• Annex A (US): 8 downstream x 11 upstream (some not compatible with each other) = ~80 plan variations, with max at 8/12/17/30 MHz
• G.993.2 v2.0 (12/2011)
• Annex B (Euro): 8 x ‘997’ plans and 17 x ‘998’ downstream plans up to 8/12/17/30 MHz
• Annex C (Japan): 4 minor band plan variants, up to 30 MHz
Exercise: Pick One (1) only bandplan for use throughout Australia
Communications Alliance
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CA WG45 “VDSL2 & Vectoring” meeting now…continuing work started in 2007
•Asymmetric Plan – B8-11, up to 17 MHz
• @400m: 100 Mbps down, 39 Mbps up
•Symmetric(ish) Plan – B7-9, up to 17 MHz
• @400m: 65 Mbps down, 55 Mbps upWhat do we want for Australia:
Symmetric or Asymmetric?
High frequency signals travel in a thin channel near the surface of a wire
• At 15 MHz, “Skin Effect” Depth is just 17 microns
Skin Effect & Corrosion
November 2012 In-Home Installations - NBN Realised 4
….first zone to be corroded away