[AusNOG] NBN VDSL Speeds | Line Sync | Determining Max Throughput

[Richard Ham (lists)]

My Zyxel VMG8324-B10A shows the following stat on a 50/20 service. A NF8AC doesn’t have any such stats that I can find.

 

               Line Rate:     22.599 Mbps       54.998 Mbps

    Actual Net Data Rate:     22.600 Mbps       54.999 Mbps

Attainable Net Data Rate:     39.884 Mbps       97.528 Mbps

 

A cisco 887 I have says the following in an sh controllers vdsl 0

 

Attainable Rate:        138131 kbits/s           48351 kbits/s

-snip-

                  DS Channel1     DS Channel0   US Channel1       US Channel0

Speed (kbps):             0            28000             0              6400

 

Cheers,

 

Richard

 

 

You'll sync at your purchased speed, with attainable rate showing your line's possible maximum.  E.g. I pay for 50/20, so sync at 55/22.  When I was previously paying for 100/40 on the same line, I was syncing at 110/44.  Not sure on attainable rate, as the HG658 doesn't show it :\

 

 

 

On Tue, 14 Mar 2017 at 8:31 pm, Ben Cummings <bcummings at clublinks.com.au> wrote:

Hello All,

 

Just a quick question that will likely be a quick answer for someone with more familiarity on the subject matter.

 

I haven't had much exposure to the inner workings of the NBN or xDSL (so please excuse my ignorance) and haven't been able to find an answer elsewhere.

 

I'm not too far away from getting FTTN at home, and am curious as to whether my standard 25/5 plan will show me a line sync speed of let's say for arguments sake, 65000 but have a maximum throughput of 25000 set further upstream by the RSP (thus suggesting a 50Mbps plan would allow me to use up to the full 50Mbps, but that I wouldn't be able to achieve near full utilisation of a 100Mbps service) -or- would a 25/5 service show my line sync as 25000 and provide me no real indication of what I could theoretically push through the copper after attenuation, equipment choice and cable wear and tear comes in to play if the cap were taken off.

 

Any insights or wisdom on this would be greatly appreciated. 

 

Kind Regards,

 

Ben Cummings

Clublinks

 

 

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