snr

Bearers generic info DS US
Payload rate [kbps]: 3352 962
Attenuation [dB]: 55.5 33.0
Margins [dB]: 10.5 9.5
Output power [dBm]: 18.5 12.0

Hi,

I am getting about 3 - 3.5 mbps on bethere up to 8-meg broadband. Do my
line stats make sense ?, I fitted an iplate yesterday, before that the
router was plugged into the test socket. Does anyone know if be's 8meg
broadband is rate-adaptive ?, the connection has not dropped since
installing the i-plate, if its rate adpative the speed could improve.

--
Eps

Eps wrote:
> Bearers generic info DS US
> Payload rate [kbps]: 3352 962
> Attenuation [dB]: 55.5 33.0
> Margins [dB]: 10.5 9.5
> Output power [dBm]: 18.5 12.0
>
> Hi,
>
> I am getting about 3 - 3.5 mbps on bethere up to 8-meg broadband. Do
> my line stats make sense ?, I fitted an iplate yesterday, before that
> the router was plugged into the test socket. Does anyone know if
> be's 8meg broadband is rate-adaptive ?, the connection has not
> dropped since installing the i-plate, if its rate adpative the speed
> could improve.

Be's ADSL is not rate adaptive in the same way as MaxDSL. They do employ
Digital Line Management during the first ten days after connection, which
will automatically adjust parameters such as SNR and Interleaving according
to resynchs.

Unfortunately your line Attenuation rates are high, meaning your line is
poor quality or that you are a considerable distance from the exchange so
your speeds will never be great.

If you feel your line is now more stable than during the DLM period, you can
lower the SNR down to [defaults] 6 or even 3. Lowering SNR will increase the
synch speed but can destabilise the line, possibly resulting in frequent
resynchs. You can also check if your line is interleaved or fastpath by
checking for FEC errors in the router stats, if they appear your line is
interleaved, if not it is fastpath.

You can adjust the SNR and Interleave/Fastpath parameters if you log in to
the Be portal. At bottom right look for 'Profile Change', 'Optimise for
Speed' is SNR, 3dB, 'Standard' 6dB, 'Optimise for realiabilty' 9dB. 'Gaming
Mode' 'on' means Interleaving is 'off' [fastpath], mode 'off' means
interleaving is 'on'.

Ideally you should aim for a low SNR, fastpath profile, ie 3dB - Fastpath.

Either change them on the portal or raise a ticket and experiment to find
the optimum setting for your line.

If you have a router which supports DMT Tool you can adjust the SNR
yourself.

"Ato_Zee" <(E-Mail Removed)> wrote in message
news:16pbl.36608$(E-Mail Removed)2...
>
>> If you have a router which supports DMT Tool you can adjust the SNR
>> yourself.
>
> Bearing in mind that if your line doesn't support the lower SNR that
> you set, it may raise it again...

Not with Be LLU, it is not rate adaptive like MaxDSL. The SNR will remain
the same, even if the line is resynching constantly, until it is manually
raised.

The only exception would be if Be's DLM was still active, after the initial
10 days it is not, even then it would be a simple matter of changing back
once DLM is complete and the profile will stick.

Pod wrote:

> Be's ADSL is not rate adaptive in the same way as MaxDSL. They do employ
> Digital Line Management during the first ten days after connection, which
> will automatically adjust parameters such as SNR and Interleaving according
> to resynchs.
>
> Unfortunately your line Attenuation rates are high, meaning your line is
> poor quality or that you are a considerable distance from the exchange so
> your speeds will never be great.
>
> If you feel your line is now more stable than during the DLM period, you can
> lower the SNR down to [defaults] 6 or even 3. Lowering SNR will increase the
> synch speed but can destabilise the line, possibly resulting in frequent
> resynchs. You can also check if your line is interleaved or fastpath by
> checking for FEC errors in the router stats, if they appear your line is
> interleaved, if not it is fastpath.
>
> You can adjust the SNR and Interleave/Fastpath parameters if you log in to
> the Be portal. At bottom right look for 'Profile Change', 'Optimise for
> Speed' is SNR, 3dB, 'Standard' 6dB, 'Optimise for realiabilty' 9dB. 'Gaming
> Mode' 'on' means Interleaving is 'off' [fastpath], mode 'off' means
> interleaving is 'on'.
>
> Ideally you should aim for a low SNR, fastpath profile, ie 3dB - Fastpath.
>
> Either change them on the portal or raise a ticket and experiment to find
> the optimum setting for your line.
>
> If you have a router which supports DMT Tool you can adjust the SNR
> yourself.

Thanks for that, it is very helpful. My stats have worsened, see below.
I personally would be very happy with 3 mbps but its a shared house
and some people play games, when everyone uses it at the same time,
latency becomes an issue.

Bearers generic info DS US
Payload rate [kbps]: 3161 997
Attenuation [dB]: 57.0 33.0
Margins [dB]: 9.5 10.0
Output power [dBm]: 15.0 12.0

I think it is at the limit, I don't think there is anything wrong with
the voice side of the line but I think my only option of improvement now
is to try and convince BT that there is, I will try that quiet line test.

Cheers.

--
Eps

Pod wrote:
> "Ato_Zee" <(E-Mail Removed)> wrote in message
> news:16pbl.36608$(E-Mail Removed)2...
>>> If you have a router which supports DMT Tool you can adjust the SNR
>>> yourself.
>> Bearing in mind that if your line doesn't support the lower SNR that
>> you set, it may raise it again...
>
> Not with Be LLU, it is not rate adaptive like MaxDSL. The SNR will remain
> the same, even if the line is resynching constantly, until it is manually
> raised.
>
> The only exception would be if Be's DLM was still active, after the initial
> 10 days it is not, even then it would be a simple matter of changing back
> once DLM is complete and the profile will stick.

Actually I am syncing at different rates each time I connect, I suspect
in my case that BE are just reselling the BT Adsl Max product.

--
Eps

Eps wrote:
> Pod wrote:
>> "Ato_Zee" <(E-Mail Removed)> wrote in message
>> news:16pbl.36608$(E-Mail Removed)2...
>>>> If you have a router which supports DMT Tool you can adjust the SNR
>>>> yourself.
>>> Bearing in mind that if your line doesn't support the lower SNR that
>>> you set, it may raise it again...
>>
>> Not with Be LLU, it is not rate adaptive like MaxDSL. The SNR will
>> remain the same, even if the line is resynching constantly, until it
>> is manually raised.
>>
>> The only exception would be if Be's DLM was still active, after the
>> initial 10 days it is not, even then it would be a simple matter of
>> changing back once DLM is complete and the profile will stick.
>
> Actually I am syncing at different rates each time I connect, I
> suspect in my case that BE are just reselling the BT Adsl Max product.

Thats normal. You should sync at around the same rate each time you boot up
your router but it will vary depending on time of day. In my case I'll get
a higher sync early in the morning than I will in the evening. It should be
in the same ballpark though.

--

WCZ

Eps wrote:
> Pod wrote:
>
>> Be's ADSL is not rate adaptive in the same way as MaxDSL. They do
>> employ Digital Line Management during the first ten days after
>> connection, which will automatically adjust parameters such as SNR
>> and Interleaving according to resynchs.
>>
>> Unfortunately your line Attenuation rates are high, meaning your
>> line is poor quality or that you are a considerable distance from
>> the exchange so your speeds will never be great.
>>
>> If you feel your line is now more stable than during the DLM period,
>> you can lower the SNR down to [defaults] 6 or even 3. Lowering SNR
>> will increase the synch speed but can destabilise the line, possibly
>> resulting in frequent resynchs. You can also check if your line is
>> interleaved or fastpath by checking for FEC errors in the router
>> stats, if they appear your line is interleaved, if not it is
>> fastpath. You can adjust the SNR and Interleave/Fastpath parameters if
>> you log
>> in to the Be portal. At bottom right look for 'Profile Change',
>> 'Optimise for Speed' is SNR, 3dB, 'Standard' 6dB, 'Optimise for
>> realiabilty' 9dB. 'Gaming Mode' 'on' means Interleaving is 'off'
>> [fastpath], mode 'off' means interleaving is 'on'.
>>
>> Ideally you should aim for a low SNR, fastpath profile, ie 3dB -
>> Fastpath. Either change them on the portal or raise a ticket and
>> experiment to
>> find the optimum setting for your line.
>>
>> If you have a router which supports DMT Tool you can adjust the SNR
>> yourself.
>
> Thanks for that, it is very helpful. My stats have worsened, see
> below. I personally would be very happy with 3 mbps but its a shared
> house and some people play games, when everyone uses it at the same time,
> latency becomes an issue.
>
> Bearers generic info DS US
> Payload rate [kbps]: 3161 997
> Attenuation [dB]: 57.0 33.0
> Margins [dB]: 9.5 10.0
> Output power [dBm]: 15.0 12.0
>
> I think it is at the limit, I don't think there is anything wrong with
> the voice side of the line but I think my only option of improvement
> now is to try and convince BT that there is, I will try that quiet
> line test.
> Cheers.

You need to reduce your SNR margin to 6dB. I doubt you'll find 3dB stable
enough for use with games but it's worth a try. One of the other posts
explained how to change the SNR margin using the BE site. At a guess I
would say you'll get around 4Mb with a 6dB margin.

--

WCZ

WCZ wrote:

> Thats normal. You should sync at around the same rate each time you boot up
> your router but it will vary depending on time of day. In my case I'll get
> a higher sync early in the morning than I will in the evening. It should be
> in the same ballpark though.
>

lowest I have seen is 2.2 mbps, higest is 3.8 mbps, sound about right ?

--
Eps

Eps wrote:
> WCZ wrote:
>
>> Thats normal. You should sync at around the same rate each time you
>> boot up your router but it will vary depending on time of day. In
>> my case I'll get a higher sync early in the morning than I will in
>> the evening. It should be in the same ballpark though.
>>
>
> lowest I have seen is 2.2 mbps, higest is 3.8 mbps, sound about right
> ?

Hmmmm. Sounds a bit too variable to me. Might be worth keeping a log of
your router stats after it boots up.

--

WCZ

WCZ wrote:

> You need to reduce your SNR margin to 6dB. I doubt you'll find 3dB stable
> enough for use with games but it's worth a try. One of the other posts
> explained how to change the SNR margin using the BE site. At a guess I
> would say you'll get around 4Mb with a 6dB margin.

Yes I think I will try this as well, problem is that a couple of my
housemates play mmorpg's, reliability is as important as latency.

Cheers.

--
Eps