1

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