Changed to a wireless router and ....

Changed from my Speedtouch 330 to a Belkin wireless router and my downstream
line attenuation has changed from 46dB (as measured by Dr Speedtouch), to
33dB according to the Belkin stats page. What the blazes is goin on! Which
one's more correct?

In an earlier contribution to this discussion,
Steve <(E-Mail Removed)> wrote:

> Changed from my Speedtouch 330 to a Belkin wireless router and my
> downstream line attenuation has changed from 46dB (as measured by Dr
> Speedtouch), to 33dB according to the Belkin stats page. What the
> blazes is goin on! Which one's more correct?

I'd believe the Belkin - it's a better figure! <g>

More to the point, what were the respective SNR or Noise Margin figures
reported?
--
Cheers,
Tim
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"Tiscali Tim" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
> In an earlier contribution to this discussion,
> Steve <(E-Mail Removed)> wrote:
>
>> Changed from my Speedtouch 330 to a Belkin wireless router and my
>> downstream line attenuation has changed from 46dB (as measured by Dr
>> Speedtouch), to 33dB according to the Belkin stats page. What the
>> blazes is goin on! Which one's more correct?
>
> I'd believe the Belkin - it's a better figure! <g>
>
> More to the point, what were the respective SNR or Noise Margin figures
> reported?
> --
> Cheers,
> Tim
> ______
> Please reply to newsgroup. Reply address is invalid.
>
>
Hi Tim,
Not sure what the SNR is. Outputs from the router are as follows:

Statistics Downstream Upstream
Line Rate 1152 Kbps 288 Kbps
Attainable Line Rate 5344 Kbps 1124 Kbps
Noise Margin 25.9 dB 27.0 dB
Line Attenuation 33.0 dB 25.0 dB
Output Power 11.9 dBm 17.7 dBm

Regards
Steve.

Steve wrote:
> Changed from my Speedtouch 330 to a Belkin wireless router and my
> downstream line attenuation has changed from 46dB (as measured by Dr
> Speedtouch), to 33dB according to the Belkin stats page. What the
> blazes is goin on! Which one's more correct?

Possibly neither, the diagnostics in most routers (if not all) can only
be used as a general guide. Out of the number of routers I have used,
the most accurate was the Draytek 2600g & Netgear DG834G (& the worst
was the Dlink 604T) but even they were not that accurate.

The only way you can get an accurate reading is by using the BT ADSL
Toolbox software & a Voyager 105 modem.

Even the remote testing system (Whoosh) used by the ISP's & some BT
diagnostic test desks is not completely accurate so why do you think
your cheap, uncalibrated, budget router be any better?

Just keep a track of the results you are getting & check them every so
often to see if they are fluctuating wildly or just gradually
deteriorating, other than that they are of no significance at all

On Wed, 12 Oct 2005 20:39:56 GMT, "Steve" <(E-Mail Removed)> wrote:

>Changed from my Speedtouch 330 to a Belkin wireless router and my downstream
>line attenuation has changed from 46dB (as measured by Dr Speedtouch), to
>33dB according to the Belkin stats page. What the blazes is goin on! Which
>one's more correct?

they could both be right, though its unlikely. I had a similar
experience.

Phil
--
Tiscali - dialup speeds at Broadband prices, see
http://bbs.adslguide.org.uk/postlist...&Board=tiscali

AOL - the unlimited ISP of choice for heavy downloaders.

In article <ndf3f.439$(E-Mail Removed)>, (E-Mail Removed)
says...

> Line Attenuation 33.0 dB 25.0 dB

You'd expect the upstream attenuation to be about 60% of the downstream
value (for downstream attenuation over 20dB) - so I'd say your true
attenuation is somewhere in the low 40's. A woosh test by your ISP will
only confirm what your router tells you (the DSLAM at the exchange asks
the NTE what it thinks the value is after training). I'd say going by
the noise margin you have the line would be good for 2Mbit at the very
least.


Alex

In an earlier contribution to this discussion,
Steve <(E-Mail Removed)> wrote:

> Hi Tim,
> Not sure what the SNR is. Outputs from the router are as follows:
>
> Statistics Downstream Upstream
> Line Rate 1152 Kbps 288 Kbps
> Attainable Line Rate 5344 Kbps 1124 Kbps
> Noise Margin 25.9 dB 27.0 dB
> Line Attenuation 33.0 dB 25.0 dB
> Output Power 11.9 dBm 17.7 dBm
>
> Regards
> Steve.

Some devices report SNR (signal to noise ratio) and some Noise Margin -
which are more or less the same thing. It's a measure of how well it can
discriminate between different levels without noise creeping in and causing
data errors.

Your downstream noise margin is reported as 25.9dB by your router. What did
the Speedtouch say?
--
Cheers,
Tim
______
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"Tiscali Tim" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
> In an earlier contribution to this discussion,
> Steve <(E-Mail Removed)> wrote:
>
>> Hi Tim,
>> Not sure what the SNR is. Outputs from the router are as follows:
>>
>> Statistics Downstream Upstream
>> Line Rate 1152 Kbps 288 Kbps
>> Attainable Line Rate 5344 Kbps 1124 Kbps
>> Noise Margin 25.9 dB 27.0 dB
>> Line Attenuation 33.0 dB 25.0 dB
>> Output Power 11.9 dBm 17.7 dBm
>>
>> Regards
>> Steve.
>
> Some devices report SNR (signal to noise ratio) and some Noise Margin -
> which are more or less the same thing. It's a measure of how well it can
> discriminate between different levels without noise creeping in and
> causing
> data errors.
>
> Your downstream noise margin is reported as 25.9dB by your router. What
> did
> the Speedtouch say?
> --
> Cheers,
> Tim
> ______
> Please reply to newsgroup. Reply address is invalid.
>
>
Tim,
The other stats were pretty much identical on both SpeedTouch and Belkin.
Only the downstream attenuation and output power, ( 0dBm for the
SpeedTouch), were different.
Regards,
Steve.

In an earlier contribution to this discussion,
Steve <(E-Mail Removed)> wrote:

>>
> Tim,
> The other stats were pretty much identical on both SpeedTouch and
> Belkin. Only the downstream attenuation and output power, ( 0dBm for
> the SpeedTouch), were different.
> Regards,
> Steve.

In that case, I wouldn't worry about it!
--
Cheers,
Tim
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