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ASUS DSL-AC68U slow download speed

vin
Newbie
Posts: 7
Registered: 07-10-2015

ASUS DSL-AC68U slow download speed

Hi
I've replaced my openreach dsl modem with all in one ASUS DSL-AC68U and the download speed has dropped to 4Mbs upload speed looks fine.
I used the stock settings for FTTC for plusnet within the ASUS.
Any advice as to what I can do to get back up to 30Mbs, tried turning off over night.
Cheers vin
14 REPLIES
St3
Aspiring Champion
Posts: 2,608
Thanks: 498
Fixes: 5
Registered: 13-07-2012

Re: ASUS DSL-AC68U slow download speed

i could be wrong but i was told never to remove the openreach modem and its only the router you can switch, id recomend putting the openreach modem back.
PeeGee
Aspiring Pro
Posts: 1,099
Thanks: 51
Fixes: 3
Registered: 05-04-2009

Re: ASUS DSL-AC68U slow download speed

I have found, in the past, that different cables can cause problems. I know not why, but changing between a "cross-over" (connector pins 2-3 and 3-2) and "straight" (2-2 and 3-3) cable can make a difference.
Have you run a BT diagnostic and checked your Plusnet profile?
Phil
Plusnet Fibre (Sep 2014), Essentials (Feb 2013); ADSL (Apr 2009); Customer since Jan 2004 (on 28kb dial-up)
Using a TP-Link TD-W9980 modem-router.
vin
Newbie
Posts: 7
Registered: 07-10-2015

Re: ASUS DSL-AC68U slow download speed

Thanks Phil, I used the original DSL cable.from the openreach box.
BT diags are showing 11Mbs download so slightly better.
I will see what cable is in the box and try again.
Cheers vin
GG
Grafter
Posts: 36
Registered: 06-09-2015

Re: ASUS DSL-AC68U slow download speed

Ok, since I both own and use an AC68U, here goes......
Firstly, the ASUS DSL-AC68U AC1900 is a good unit but only if setup correctly.
Secondly, providing the ASUS is set up correctly, you only need to consider the use of either a CAT5e or CAT6 patch lead between the Asus and the PC / switch of your choice.
Thirdly, use the phone lead/cable that came with the Asus.
If you need the settings for the Asus VDSL settings, I can grab some screen shots for you.
Have a look under "system log" then click on the "DSL LOG" tab. You will be looking to see what "Annex mode" you are on. It should be "Annex A", though it may be "Annex B" as it is in my case, though for what reason I do not know.
You may also find the other information on that page of use too.
The general log may also be worth having a look through too.
vin
Newbie
Posts: 7
Registered: 07-10-2015

Re: ASUS DSL-AC68U slow download speed

thanks GG will give that a go.
vin
Newbie
Posts: 7
Registered: 07-10-2015

Re: ASUS DSL-AC68U slow download speed

Ok Asus dsl cable no joy,
System Log - DSL Log
This page shows the detailed system's activities.
DSL Firmware Version 1.0.2.9
DSL Driver Version FwVer:5.5.1.131_B_A60901 HwVer:T14.F7_0.2
DSL Link Status
up
DSL Uptime
0 days 0 hours 5 minute(s) 7 seconds
DSL modulation
ITU G.993.2(VDSL2)
ANNEX Mode
ANNEX B
SNR Down
7.1 dB
SNR Up
10.0 dB
Line Attenuation Down
5.1 dB
Line Attenuation Up
0.1 dB
Path Mode(downstream)
FastPath
Path Mode(upstream)
FastPath
Data Rate Down
79999 kbps
Data Rate Up
20000 kbps
MAX Rate Down
96200
MAX Rate Up
27552
POWER Down
11.4 dbm
POWER Up
-7.8 dbm
CRC Down
0
CRC Up
0
DSL settings attached. Annex A set but it doesn't loog to have taken.
Cheers vin
Community Veteran
Posts: 6,315
Thanks: 86
Fixes: 3
Registered: 08-01-2008

Re: ASUS DSL-AC68U slow download speed

Quote from: vin
Annex A set but it doesn't loog to have taken.

Annex B, as in your log, is technically correct for VDSL2 (the Annex has a different meaning to that used for ADSLx), I wouldn't worry about that to be honest.
Your sync speed (Data Rate) is maximum both down and up so there doesn't appear to be any issue with the modem settings.
What 'Current Line Speed' is reported here: https://portal.plus.net/my.html?action=data_transfer_speed (login required)?
Call me 'w23'
At any given moment in the universe many things happen. Coincidence is a matter of how close these events are in space, time and relationship.
Opinions expressed in forum posts are those of the poster, others may have different views.
vin
Newbie
Posts: 7
Registered: 07-10-2015

Re: ASUS DSL-AC68U slow download speed

I was thinking that line speed set at 4.5Mbs also upload speed 20Mbs capable so I am thinking my service got throttled in some way between the change over ?
AshPowell
Grafter
Posts: 46
Registered: 28-05-2015

Re: ASUS DSL-AC68U slow download speed

Quote from: vin

Data Rate Down
79999 kbps
Data Rate Up
20000 kbps
MAX Rate Down
96200
MAX Rate Up
27552
DSL settings attached. Annex A set but it doesn't loog to have taken.
Cheers vin

From the looks of it you're connected at max speed, 80 down and 20 up...
I think the problem lies between your comp and the router.. make sure you're connected via cable and try again at http://www.speedtest.net
(Annex B is actually the right setting btw, but neither really matter as itll use B anyway)
vin
Newbie
Posts: 7
Registered: 07-10-2015

Re: ASUS DSL-AC68U slow download speed

hmm
Just checked via wire and its clear I am only getting 4Mbs so it must be throttled at the exchange upload is 20Mbs.
I had this behaviour when the system was installed, it had to be reset at the exchange.
Logged a call see if I can get it fixed it seems obvious to me if I get 20Mbs upload there cant be a lot wrong with the setup. 
Thanks for all of you input will summarise if fault is at the exchange.
Cheers Vin
Community Veteran
Posts: 6,315
Thanks: 86
Fixes: 3
Registered: 08-01-2008

Re: ASUS DSL-AC68U slow download speed

Quote from: vin
I was thinking that line speed set at 4.5Mbs also upload speed 20Mbs capable so I am thinking my service got throttled in some way between the change over ?

To clarify, please, are you saying that 'Current Line Speed' (as my link and attached example) is set to 4.5Mb(/s)?  If so this is the entire problem and simply needs resetting by Plusnet
Call me 'w23'
At any given moment in the universe many things happen. Coincidence is a matter of how close these events are in space, time and relationship.
Opinions expressed in forum posts are those of the poster, others may have different views.
Community Gaffer
Community Gaffer
Posts: 13,431
Thanks: 1,187
Fixes: 92
Registered: 04-04-2007

Re: ASUS DSL-AC68U slow download speed

Quote from: vin
Just checked via wire and its clear I am only getting 4Mbs so it must be throttled at the exchange upload is 20Mbs.

I've made a change to your account and sent your fault ticket back to you. Let us know if it hasn't done the trick.

Bob Pullen
Plusnet Product Team
If I've been helpful then please give thanks ⤵

vin
Newbie
Posts: 7
Registered: 07-10-2015

Re: ASUS DSL-AC68U slow download speed

Thanks again Bob,
Fixed my issue, ASUS DSL-AC68-U now delivering 38Mbs downland and 20Mbs upload on default settings.
Thanks again for the fix, now able to run 400Mbs over wireless between NAS and laptop so very happy with that, and the one box solution.
Cheers Vin
TheSanctuary
Dabbler
Posts: 13
Registered: 26-01-2016

Re: ASUS DSL-AC68U slow download speed

For my DSL-AC68U, I've used the config suggested here
http://community.plus.net/forum/index.php/topic,136784.0.html
Works fine, Down=78MBps, Up=18MBps