[AusNOG] NBN VDSL Speeds | Line Sync | Determining Max Throughput
Ben Cummings
bcummings at clublinks.com.au
Wed Mar 15 00:08:17 EST 2017
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
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 <+61390245755>
m +61 425 782 555 <+61425782555>
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
>
>
>
>
>
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