DG834GT and the DMT Tool
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- DG834GT and the DMT Tool
DG834GT and the DMT Tool
10-07-2008 5:06 PM
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The router I have bought has Firmware version V1.02.09. When I run the DMT Tool I get the message 'Error: can not identify modemtype: DMT Version 8.07 for BCM6338/6348/6358'.
I have rechecked and the DMT website shows version 8 as being correct for this router.
I have therefore tried using telnet to tweek the SNR. I did not manage to get up to my full speed until entering /usr/sbin/adslctl configure --snr 1 (yes number one), which again is at odds with what I read.This gives a reported speed of 8128kbps with a SNR of 9.8dB.
Does any-one know what is different here, for example have Netgear started using a new chipset? If so does any-one know if there is a compatible DMT tool?
Re: DG834GT and the DMT Tool
10-07-2008 5:08 PM
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Have you ticked "special logon"?
Re: DG834GT and the DMT Tool
10-07-2008 5:12 PM
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Re: DG834GT and the DMT Tool
10-07-2008 5:14 PM
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Re: DG834GT and the DMT Tool
10-07-2008 5:15 PM
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Re: DG834GT and the DMT Tool
10-07-2008 6:11 PM
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Also telneting /usr/sbin/adslctl configure --snr 1 is required.
I've just been hit with an increase from 6dB to 15dB - I've managed to reduce that to 9dB - but I don't know how to improve on that.
Unfortunately, I really need a 6dB noise margin to achieve a 6.5 - 7.0Mbits profile.
"In The Beginning Was The Word, And The Word Was Aardvark."
Re: DG834GT and the DMT Tool
10-07-2008 6:21 PM
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Re: DG834GT and the DMT Tool
10-07-2008 6:57 PM
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It may be that I would also be stopped at 9dB but just fortunate that I live near the exchange and can achieve 'full chat' with 9.8dB in hand, so I don't get to the limit.
Re: DG834GT and the DMT Tool
10-07-2008 7:20 PM
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(we'll probably never know)
Re: DG834GT and the DMT Tool
10-07-2008 10:25 PM
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It's still a drastic increase though.
If you look at the attached graph (sr-day.png), you will see that from 9pm - 10pm on 9th July BT gradually increased my noise margin a lot.
You can see that it is a normally stable line if you look at the monthly graph (sr-month.png).
I monitor noise margin every 5 minutes, whilst my PC is switched on.
Just by way of coincindence
I received an email today that says that my local exchange has been upgraded to 21CN WBC status=yes
See http://www.samknows.com/broadband/exchange/LWMIL
Coincidence?
Or have they been replacing DSLAM's?
"In The Beginning Was The Word, And The Word Was Aardvark."
Re: DG834GT and the DMT Tool
10-07-2008 10:49 PM
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Quote Exchange History
Subscribe to RSS Feed RSS Updates
09/07/2008 BT Wholesale has enabled the Mill Hill exchange for their 21CN Wholesale Broadband Connect (WBC) service
29/03/2008 BT Wholesale has set an enablement date of 30/06/2008 for their 21CN Wholesale Broadband Connect product at the Mill Hill exchange
...
"In The Beginning Was The Word, And The Word Was Aardvark."
Re: DG834GT and the DMT Tool
11-07-2008 7:51 AM
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Re: DG834GT and the DMT Tool
13-07-2008 8:32 PM
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The drawback is that if your line continues to play up then the SNR may well increase again.
Re: DG834GT and the DMT Tool
13-07-2008 9:41 PM
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But I know that I will have to get it raised to a certain level of attention at PlusNet.
PN then have to struggle to get BT to accept that they should do this action.
Couple of months (or so) it is necessary to repeat the process.
I have hopes that if I run at an elevated 9dB for a month or two, that BT will let me reset my noise margin back to its standard 6dB.
"In The Beginning Was The Word, And The Word Was Aardvark."
Re: DG834GT and the DMT Tool
14-07-2008 8:32 AM
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Quote from: axisofevil I've just been hit with an increase from 6dB to 15dB - I've managed to reduce that to 9dB - but I don't know how to improve on that.
Unfortunately, I really need a 6dB noise margin to achieve a 6.5 - 7.0Mbits profile.
That's exactly the same for me. I can only force mine down to 9 or 10dB, with a resulting speed of between 4000 and 4500 even though I've set the SNR to 1 via Telnet. It's really annoying as I know I can get much better speeds even with interleaving on (as I found it is).
P.S. 21C info for my exchange is still showing as
"WBC Rollout Status
BT have announced a ready for service date for this exchange. The estimated go live date of 30th June 2008 and was last updated 29th March 2008."
Full Fibre since September 2023
Mac OS14 and Firefox user with latest versions of both
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