[AusNOG] NBN VDSL Speeds | Line Sync | Determining Max Throughput
Philip Loenneker
Philip.Loenneker at tasmanet.com.au
Wed Mar 15 07:34:10 EST 2017
Regardless of what the modem shows, the RSP can use the NBN portal to run diagnostics on any of their own existing FttN services to see the current sync rate, attainable rate, and a lot of other stats including estimated cable length, CPE make/model (if it’s registered), MAC address of modem, noise margins, attenuation, and graphs of uptime over the past 1 and 14 days. But of course this all relies on there being an existing service, which doesn’t help if you’re trying to work out the maximum practical service to order.
When performing a site qualification for a FttN service (part of the process for ordering a service), some lines will show an estimated attainable speed. It is usually a big range, eg 30-50 down and 10-20 up, but it can give some idea of what to expect. Also keep in mind that internal cabling at the premises can make a significant difference.
Unfortunately I think the NBN agreements prevent me from sharing a screenshot of the info available on the portal.
Regards,
Philip Loenneker | Network Engineer | TasmaNet
From: AusNOG [mailto:ausnog-bounces at lists.ausnog.net] On Behalf Of Damien Gardner Jnr
Sent: Wednesday, 15 March 2017 6:16 AM
To: ausnog at lists.ausnog.net
Subject: Re: [AusNOG] NBN VDSL Speeds | Line Sync | Determining Max Throughput
Just to add privately. If you don't have access to an SQ tool, and you're on a Telstra PSTN line, I'm happy to run an SQ for you if you don't mind shooting me your landline number :)
On 15 March 2017 at 06:15, Damien Gardner Jnr <rendrag at rendrag.net<mailto:rendrag at rendrag.net>> wrote:
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<mailto: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]
Sent: Tue 14/03/2017 22:45
To: Ben Cummings
Cc: ausnog at lists.ausnog.net<mailto: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<tel:+61%203%209024%205755> <+61390245755<tel:+61%203%209024%205755>>
m +61 425 782 555<tel:+61%20425%20782%20555> <+61425782555<tel:+61%20425%20782%20555>>
e matthew at mamis.com.au<mailto:matthew at mamis.com.au>
w www.mamis.com.au<http://www.mamis.com.au>
On 14 March 2017 at 21:04, Richard Ham (lists) <rich-lists at edit-co.com<mailto: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<mailto: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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--
Damien Gardner Jnr
VK2TDG. Dip EE. GradIEAust
rendrag at rendrag.net<mailto: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
--
Damien Gardner Jnr
VK2TDG. Dip EE. GradIEAust
rendrag at rendrag.net<mailto: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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