what do chorus do differently for the different fibre speeds?

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hattrick123

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#251485 27-Jun-2019 14:59

what do chorus do differently for the different fibre speeds?

I presume the fibre they run from the curb to your house is standard for all home connections.

I am just wondering why one speed is 950/500 v. 100/30. Is it just to offer different pricing of different speeds? is it the same tech more or less with a cap on them?

Or is there different technologies from 950/500 v. 100/30?

chorus say to achieve 950/500 "Chorus provides your Fibre Pro broadband connection using GPON (Gigabit-capable Passive Optical Networks) and GE (Gigabit Ethernet) technology."

but is GPON or GE not used for 100/30?

Appreciate any replies.

tks

ref

https://www.chorus.co.nz/help-and-support/fibre-explained/what-fibre-pro-and-how-does-it-work

darylblake

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#2265766 27-Jun-2019 15:03

Yes it connects at the full speed of the GPON fibre.

They manage the maximum speeds and high priority traffic using networking software and profiles.

hio77

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#2265773 27-Jun-2019 15:08

Chorus's fibre 100 is 100/20.

Given you are talking 100/30... i wondre if you mean 124/30 aka.. max vectored vdsl speed?

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networkn

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#2265780 27-Jun-2019 15:26

They just open the taps a little more for faster connections :)

cyril7

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#2265795 27-Jun-2019 15:50

Hi, as others have said the speed of the interfaces and fibre itself is 2.5Gb/s / 1.25Gb/s on the GPON interface, and Gigabit on the Ethernet interface of the ONT. Plans that offer less speeds are simply policed on the L2 datapath through Chorus's network, I presume at the OLT.

Cyril

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#2265817 27-Jun-2019 16:53

cyril7: Hi, as others have said the speed of the interfaces and fibre itself is 2.5Gb/s / 1.25Gb/s on the GPON interface, and Gigabit on the Ethernet interface of the ONT.

I was always curious about the 'raw speed' of UFB fibre (or more precisely, the equipment on each end of the fibre), but never enough to go and research it. Presumably this means that if my 14 neighbours and I sharing the one passive optical splitter out on the street, all had 950/500 connections and all did a SpeedTest at the same time, under ridiculously ideal conditions we would each get 1/15th of 2.5Gb/s or around 160mbps.

I guess for 10gbps UFB areas, the ONT's connected to that optical splitter all would need upgrading? I idly wonder if the GPON passive optical splitter is up to the 10gbps job or whether the 10gbps adds new light wavelengths that the current splitters aren't quite good enough for.

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cyril7

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#2265827 27-Jun-2019 17:38

Hi yes if you all did a speedtest simultaneously contention would occur, however reality is in real practical use the contention ratio offered via 2.5Gb/s in the local loop across 16 users is still very good for a residential plan, especially when you consider most users are just on a 100/20 plan.

Cyril

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#2265828 27-Jun-2019 17:40

Oh and re 10g, yes it's on a separate wavelength so both 10Gpon and 1Gpon can exist on the same pon simultaneously

Cyril

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BarTender

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#2265834 27-Jun-2019 17:58

hio77:

Chorus's fibre 100 is 100/20.

Given you are talking 100/30... i wondre if you mean 124/30 aka.. max vectored vdsl speed?

Chorus 100/20 is actually 110/22 at layer 2. Then a Layer 3 speed test should result in a speed just above 100/20.

There are QoS policers in place to limit the traffic based on the product you purchased.

Technically Chorus could give line speed, but then they would need to dimension their network to handle that.

It's all Brent's fault it works so well.

Talkiet

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#2265847 27-Jun-2019 18:22

Chorus have publicly available PON port utilisation 15 minute averages available on their site for anyone that cares enough to see how much of an "issue" 16 or 32 users sharing "only" 2.5Gbps really is.

Hint: don't bother, it's not a problem anywhere.

Cheers - N

Please note all comments are from my own brain and don't necessarily represent the position or opinions of my employer, previous employers, colleagues, friends or pets.

hio77

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#2265849 27-Jun-2019 18:30

BarTender:

Chorus 100/20 is actually 110/22 at layer 2. Then a Layer 3 speed test should result in a speed just above 100/20.

It's all Brent's fault it works so well.

Knew someone would pick out the layers!

If it's all Brent's fault, he can go and be to blame for replacing all of the copper too (start with my house thanks.)

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Any comments made are personal opinion and do not reflect directly on the position my current or past employers may have.