[AusNOG] NBN VDSL Speeds | Line Sync | Determining Max Throughput
Damien Gardner Jnr
rendrag at rendrag.net
Wed Mar 15 06:15:27 EST 2017
Your ADSL sync won't really help give you any idea as to your likely VDSL
sync, as ADSL is you->pillar->exchange (or you->pillar->rim, or in some
cases you->pillar->rim->exchange), where as VDSL will be you->pillar->node.
If you have access to an SQ tool which provides cabling detail, you can
punch your phone number in and pull back your cabling records, to see how
far from the pillar you are. The node is usually < 100m from the pillar.
Once you have the distance, and the number of joints, you have a pretty
good idea of your sync speed :)
On 15 March 2017 at 00:08, Ben Cummings <bcummings at clublinks.com.au> wrote:
> Thank you all for taking the time to reply, I really appreciate your quick
> and informative responses.
>
> So my understanding now is that Maximum Line Rate/Attainable Rate ≠ Line
> Sync Rate.
> And to avoid a hypothetical scenario where I get stuck on a contract
> paying for a 50Mbps service, that will only ever allow me to see 30Mbps - I
> need to connect a modem that shows the maximum attainable rate, to see what
> I can actually achieve.
>
> Unfortunately it doesn't appear my new learning project provides that
> information (unless a VDSL connection shows detail than a ADSL connection
> does) - so I'll have to borrow something to examine that further.
>
> But I'm very much looking forward to being able to push through more than
> 13/0.8 !
>
> bcummings at the320> show interfaces at-2/0/0 extensive
> --snip--
> ADSL status:
> Modem status : Showtime (Adsl2plus)
> DSL mode : Auto Annex A
> Last fail code: None
> Subfunction : 0x00
> Seconds in showtime : 73848
> ADSL Chipset Information: ATU-R ATU-C
> Vendor Country : 0xb5 0xb5
> Vendor ID : BDCM BDCM
> Vendor Specific: 0x9385 0xa1f2
> ADSL Statistics: ATU-R ATU-C
> Attenuation (dB) : 31.0 18.0
> Capacity used (%) : 0 0
> Noise margin (dB) : 6.0 7.5
> Output power (dBm) : 19.0 12.0
>
> Interleave Fast Interleave
> Fast
> Bit rate (kbps) : 15128 0
> 1087 0
> CRC : 0 474
> 0 0
> FEC : 0 0
> 0 0
> HEC : 24722 0
> 0 0
> Received cells : 544249614 0
> Transmitted cells : 108703718 0
>
>
> Thanks again everyone.
>
> Kind Regards,
>
> Ben Cummings
> Clublinks
>
>
> -----Original Message-----
> From: Matthew Muscat [mailto:matthew at mamis.com.au <matthew at mamis.com.au>]
> Sent: Tue 14/03/2017 22:45
> To: Ben Cummings
> Cc: ausnog at lists.ausnog.net
> Subject: Re: [AusNOG] NBN VDSL Speeds | Line Sync | Determining Max
> Throughput
>
> You should be able to see the maximum line rate (depending on your modem) -
> I've got an ISP Supplied (Internode) Technicolour TG-789.
>
> We're about 20m from the pillar and have a 100/40 service - max line rate
> appears currently at 140/57 (see below)
>
> DSL Stats:
>
> Maximum Line rate: 57.62 Mbps 140.91 Mbps
> Line Rate: 44.19 Mbps 107.73 Mbps
> Output Power -1.1 dBm 8.3 dBm
> Noise Margin 15.4 dB 15.6 dB
> Line Attenuation 3.1, 12.3, 18.5 dB 7.7, 16.3, 23.5 dB
>
> Regards,
> [image: Mamis] Matthew Muscat
> Director
> p +61 3 9024 5755 <+61%203%209024%205755> <+61390245755
> <+61%203%209024%205755>>
> m +61 425 782 555 <+61%20425%20782%20555> <+61425782555
> <+61%20425%20782%20555>>
> e matthew at mamis.com.au
> w www.mamis.com.au
>
> On 14 March 2017 at 21:04, Richard Ham (lists) <rich-lists at edit-co.com>
> wrote:
>
> > 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 <13%2081%2031> 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
> >
> >
> >
> >
> >
> > _______________________________________________
> > AusNOG mailing list
> > AusNOG at lists.ausnog.net
> > http://lists.ausnog.net/mailman/listinfo/ausnog
> >
> >
> > _______________________________________________
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> >
> >
>
>
>
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>
--
Damien Gardner Jnr
VK2TDG. Dip EE. GradIEAust
rendrag at rendrag.net - http://www.rendrag.net/
--
We rode on the winds of the rising storm,
We ran to the sounds of thunder.
We danced among the lightning bolts,
and tore the world asunder
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