Max DSL advise

Seing as we are on the subject of this router, tolien - my DG834G v1 (2.5 years old) does indeed lose SNR after a while.

Initially it will connect at 27dBa SNR and 47 Attn on a 1Mbp/s line. If I download heavily or something it drops to 20/21dBa - would purchasing a new router for instance keep my SNR higher than this is able to. I mean the reading is very accurate based on the info from my ISP and BT when I enquired during their last test on my line. So is my line capable of ~25dBA then and is being hampered by the DB834G? If so, then I might consider buying a standalone modem and hooking it up to this router and just use it as a router. Which modem would you suggest for say £40.
 
Well I'm gonna test my Netgear DG834v2 Before i try another router, My plan is to leave it off and connect it after I been upgraded to max in which case my SNR is normally 25 for first few hour's so should hopfully Sync at the max and with a bit of luck it will hold on to it :D ...My thought's on this issue anyway.
 
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FunkyT said:
Isn't that a bit like saying Tesco are "pimped" but Harrods Food Dept isn't? :)
Click to expand...

If Tesco's food was 99% inedible that analogy would stand. But it isn't, so it doesn't.
The majority of consumer routers aren't (including the DG834 with the fault, and the early WAG versions too)...

IPCop box has a similar price tag to the DG834 you love so much. no one pushes them on the high street (and it'll blow any consumer router away on stability and features)...
 
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I have a DG834G and it seems to operate pretty well.

However I am interested to read the NETGEAR forum post that has been mentioned earlier.

I am running the latest firmware on the router, this has had an ADSL code change, before my line would sync around 21dB SnR. Then it would swing around the place quite a bit, sometimes as low as 5dB. However it has stayed connected to the internet for around 240hours, previous to this it was connected with similar line stats and for around 2000 hours. (Signal to noise is kind of how "loud" the signal is above the background Noise on the line in basic terms)

The Attenuation that the router is reading is 52dB. I understand Attenuation SnR etc I am an electrical engineer, what it means and how it relates to signal analysis.

I had a similar router made this time by Linksys (NOT CISCO SYSTEMS) and that had almost identical statistics, however when the noise margin dropped to around 6dB throughput tailed right off until it lost sync. It also had the added disadvantage that for some reason on never minding what setting it would have I could never FTP via it. (nor would it work for Linksys Technical Support or anyone else I know - funny how they never changed the code for that ever :mad: )

The debate about routers seems to get some odd responses. The ADSL code in all routers/modems is designed to operate on varying types of DSLAM. A BT "Engineer" coming to your house will use nothing more than a Voyager modem and a toughbook, unless you get a Member of the Precision Test Team. In a lot of cases the cable asset it very old, rodent damage water ingress etc will cause noise to build up on the line thus affecting the signal, I've come to see that the Netgear that I have seems to aggregate the Line Statistic over a period of time and not the instantanious margin.

As I rule of thumb *most* ISP's and members of engineering teams from BT Wholesale that I have spoken to regard 6dB SnR as pretty poor 8dB is getting there and 12dB is fine anything more and its great.

I'm not up to speed on the MAX system however I'd imagine if the DSLAM (which is the device in the scheme that will measure the SnR and attenuation) Is happy with the rate, it will attempt to reach the lowest SnR at the highest speed that it is able to comfortably transmit data this will be the definative figure and I would also hazard a guess that this equipment is more than capable of collecting a score much better than any device that we buy other than something that was designed ground up with that equipment. Seeing as BT deployed various makes of DSLAM that would be a lottery in itself.

Shunts
 
Hi

To give personal experience on the Netgear here is how my DG834 v2 has been ...

On 2mb/s ive had stats of down att 26 ( never changes ) & SNR of 26 during daytime dropping to 16 or so every evening after approx 10 hours use ... this gave me concerns about going MAX but i bit the bullet

On Max 8mb/s since 10/4 ... Down att still 26 & SNR now changes slighty between 9 & 6 all day & night ... ive only seen 3 resyncs so far & the sync rate has not dropped below 7124 ( i beleive was the lowest)

My conclusion for my connection is ... the DG834 has actually been more stable on the SNR since going MAX although previously i would turn power off overnight its been powered nearly all the time since regraded to MAX and the SNR has not seen the same drops i got in the past ... now i maybe an isolated case or just lucky thats for others to compare

Hope that helps a little & isnt pointless :P
 
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