I may have made a mistake

My connection speed has gone down from about 4500 to about 600 kbps.

I had just been trying to set up a modem connection (dial-up) while the
broadband was connected.

What I *may* have done wrong was to have a microfilter in the wrong
place such that the modem connection was not filtered.

The router logs show several line drops and the low connection speed.

My connection is now stable but at 600kbps.
The router shows Noise Margin of 28 rather than the usual 7dB

I suspect the BRAS profile has gone really low.

How long will it take to come back to normal?
Is there anything I can do?
--
Chris

"Chris" <nospam@[127.0.0.1]> wrote in message news:G4UWjeBdEQjMFwRd@[127.0.0.1]...
> My connection speed has gone down from about 4500 to about 600 kbps.
>
> I had just been trying to set up a modem connection (dial-up) while the broadband was connected.
>
> What I *may* have done wrong was to have a microfilter in the wrong place such that the modem connection was not filtered.
>
> The router logs show several line drops and the low connection speed.
>
> My connection is now stable but at 600kbps.
> The router shows Noise Margin of 28 rather than the usual 7dB
>
> I suspect the BRAS profile has gone really low.
>
> How long will it take to come back to normal?
> Is there anything I can do?

No different to lifting an unfiltered phone go off hook, very likely to cause the router to lose sync.

I found this quite informative.
http://www.thinkbroadband.com/files/...nd-legends.pdf
Some parts may be out of date.

AFAIK, it is still true that DLM will act if it sees 10 resync events in an hour.
I would leave it alone for 10 days, see what transpires.


--
Graham.

%Profound_observation%

>
> Reboot your router.
>
> Your BRAS will never improve unless you get your router to connect at a
> normal speed with a more normal noise margin.
>

Correct. Do this. Your BRAS will be down to 0.5Mb/s for a while but
assuming a reboot takes you back to 4.5Mb/s you should see the BRAS sort
itself out quite quickly due to the large swing in sync speed.

--

WCZ

In article <2d-dnRfiysLojRDRnZ2dnUVZ8r-(E-Mail Removed)>, Peter
Crosland <(E-Mail Removed)> writes
>"Chris" <nospam@[127.0.0.1]> wrote in message
>news:G4UWjeBdEQjMFwRd@[127.0.0.1]...
>> My connection speed has gone down from about 4500 to about 600 kbps.
>>
>> I had just been trying to set up a modem connection (dial-up) while the
>> broadband was connected.
>>
>> What I *may* have done wrong was to have a microfilter in the wrong place
>> such that the modem connection was not filtered.
>>
>> The router logs show several line drops and the low connection speed.
>>
>> My connection is now stable but at 600kbps.
>> The router shows Noise Margin of 28 rather than the usual 7dB
>>
>> I suspect the BRAS profile has gone really low.
>>
>> How long will it take to come back to normal?
>> Is there anything I can do?



>Ask you ISP to reset it. The line will then go through the same process as
>with a new ADSL installation.
>Peter Crosland


Thanks, Peter - I will try that - though my ISP is Pipex and so they may
not understand!

Can the ISP do the reset - or do they have to ask BT to do it?
--
Chris

"Mark" <(E-Mail Removed)> wrote in message news:(E-Mail Removed)...
> On Mon, 13 Sep 2010 00:23:00 +0100, "Brian Gregory [UK]"
> <(E-Mail Removed)> wrote:
>
>>"Chris" <nospam@[127.0.0.1]> wrote in message
>>news:G4UWjeBdEQjMFwRd@[127.0.0.1]...
>>> My connection speed has gone down from about 4500 to about 600 kbps.
>>>
>>> I had just been trying to set up a modem connection (dial-up) while the
>>> broadband was connected.
>>>
>>> What I *may* have done wrong was to have a microfilter in the wrong place
>>> such that the modem connection was not filtered.
>>>
>>> The router logs show several line drops and the low connection speed.
>>>
>>> My connection is now stable but at 600kbps.
>>> The router shows Noise Margin of 28 rather than the usual 7dB
>>>
>>> I suspect the BRAS profile has gone really low.
>>>
>>> How long will it take to come back to normal?
>>> Is there anything I can do?
>>> --
>>> Chris
>>
>>Reboot your router.
>>
>>Your BRAS will never improve unless you get your router to connect at a
>>normal speed with a more normal noise margin.
>
> Correct. It can take several days for the profile to recover but is
> likely to be quicker for a large change of sync speed.
>
> And not connecting the router through a microfilter is not a problem.
> It does not need one. You may have a fault. If the problem reoccurs
> do may need to do some investigation.

You've misread what the OP said. It was an analogue modem that was connected
sans filter.

--
Graham.

%Profound_observation%

In article <i6j3fl$rqo$(E-Mail Removed)>, Graham.
<(E-Mail Removed)> writes
>
>
>"Chris" <nospam@[127.0.0.1]> wrote in message
>news:G4UWjeBdEQjMFwRd@[127.0.0.1]...
>> My connection speed has gone down from about 4500 to about 600 kbps.
>>
>> I had just been trying to set up a modem connection (dial-up) while
>>the broadband was connected.
>>
>> What I *may* have done wrong was to have a microfilter in the wrong
>>place such that the modem connection was not filtered.
>>
>> The router logs show several line drops and the low connection speed.
>>
>> My connection is now stable but at 600kbps.
>> The router shows Noise Margin of 28 rather than the usual 7dB
>>
>> I suspect the BRAS profile has gone really low.
>>
>> How long will it take to come back to normal?
>> Is there anything I can do?



>No different to lifting an unfiltered phone go off hook, very likely to
>cause the router to lose sync.
>
>I found this quite informative.
>http://www.thinkbroadband.com/files/...nd-legends.pdf
>Some parts may be out of date.
>
>AFAIK, it is still true that DLM will act if it sees 10 resync events
>in an hour.
>I would leave it alone for 10 days, see what transpires.


Thanks, Graham.
Your PDF looks very useful.
--
Chris

In article <i6j3fl$rqo$(E-Mail Removed)>, Graham.
<(E-Mail Removed)> writes
>
>
>"Chris" <nospam@[127.0.0.1]> wrote in message
>news:G4UWjeBdEQjMFwRd@[127.0.0.1]...
>> My connection speed has gone down from about 4500 to about 600 kbps.
>>
>> I had just been trying to set up a modem connection (dial-up) while
>>the broadband was connected.
>>
>> What I *may* have done wrong was to have a microfilter in the wrong
>>place such that the modem connection was not filtered.
>>
>> The router logs show several line drops and the low connection speed.
>>
>> My connection is now stable but at 600kbps.
>> The router shows Noise Margin of 28 rather than the usual 7dB
>>
>> I suspect the BRAS profile has gone really low.
>>
>> How long will it take to come back to normal?
>> Is there anything I can do?



>No different to lifting an unfiltered phone go off hook, very likely to
>cause the router to lose sync.
>
>I found this quite informative.
>http://www.thinkbroadband.com/files/...nd-legends.pdf
>Some parts may be out of date.
>
>AFAIK, it is still true that DLM will act if it sees 10 resync events
>in an hour.
>I would leave it alone for 10 days, see what transpires.



Thanks, Graham - your PDF looks very useful.
--
Chris

In article <i6l52s$6fj$(E-Mail Removed)>, Graham.
<(E-Mail Removed)> writes
>
>
>"Mark" <(E-Mail Removed)> wrote in message
>news:(E-Mail Removed).. .
>> On Mon, 13 Sep 2010 00:23:00 +0100, "Brian Gregory [UK]"
>> <(E-Mail Removed)> wrote:
>>
>>>"Chris" <nospam@[127.0.0.1]> wrote in message
>>>news:G4UWjeBdEQjMFwRd@[127.0.0.1]...
>>>> My connection speed has gone down from about 4500 to about 600 kbps.
>>>>
>>>> I had just been trying to set up a modem connection (dial-up) while the
>>>> broadband was connected.
>>>>
>>>> What I *may* have done wrong was to have a microfilter in the wrong place
>>>> such that the modem connection was not filtered.
>>>>
>>>> The router logs show several line drops and the low connection speed.
>>>>
>>>> My connection is now stable but at 600kbps.
>>>> The router shows Noise Margin of 28 rather than the usual 7dB
>>>>
>>>> I suspect the BRAS profile has gone really low.
>>>>
>>>> How long will it take to come back to normal?
>>>> Is there anything I can do?
>>>> --
>>>> Chris
>>>
>>>Reboot your router.
>>>
>>>Your BRAS will never improve unless you get your router to connect at a
>>>normal speed with a more normal noise margin.
>>
>> Correct. It can take several days for the profile to recover but is
>> likely to be quicker for a large change of sync speed.
>>
>> And not connecting the router through a microfilter is not a problem.
>> It does not need one. You may have a fault. If the problem reoccurs
>> do may need to do some investigation.
>
>You've misread what the OP said. It was an analogue modem that was connected
>sans filter.
>
Well spotted!
--
Chris

In article <(E-Mail Removed)>, "Brian
Gregory [UK]" <(E-Mail Removed)> writes
>"Chris" <nospam@[127.0.0.1]> wrote in message
>news:G4UWjeBdEQjMFwRd@[127.0.0.1]...
>> My connection speed has gone down from about 4500 to about 600 kbps.
>>
>> I had just been trying to set up a modem connection (dial-up) while the
>> broadband was connected.
>>
>> What I *may* have done wrong was to have a microfilter in the wrong place
>> such that the modem connection was not filtered.
>>
>> The router logs show several line drops and the low connection speed.
>>
>> My connection is now stable but at 600kbps.
>> The router shows Noise Margin of 28 rather than the usual 7dB
>>
>> I suspect the BRAS profile has gone really low.
>>
>> How long will it take to come back to normal?
>> Is there anything I can do?
>> --
>> Chris



>Reboot your router.
>Your BRAS will never improve unless you get your router to connect at a
>normal speed with a more normal noise margin.


Thanks, Brian - I have done that - and there was an immediate
improvement.
The connection speed is now 2976 and the noise margin is 12.4.
So there's still some way to go - but, at least, the connection is now
fast enough to be usable.

I may now just wait.
Or I may try ringing Pipex.
But I quail at that thought!

BTW is it better to turn the router off overnight or to leave it on all
the time?
(As far as getting the BRAS profile up is concerned.)
--
Chris

On 13/09/10 16:59, Brian Gregory [UK] wrote:
> "Chris" <nospam@[127.0.0.1]> wrote in message
> news:m+zEvZAtdhjMFwkT@[127.0.0.1]...
>> In article <2d-dnRfiysLojRDRnZ2dnUVZ8r-(E-Mail Removed)>, Peter
>> Crosland <(E-Mail Removed)> writes
>>> "Chris" <nospam@[127.0.0.1]> wrote in message
>>> news:G4UWjeBdEQjMFwRd@[127.0.0.1]...
>>>> My connection speed has gone down from about 4500 to about 600 kbps.
>>>>
>>>> I had just been trying to set up a modem connection (dial-up) while the
>>>> broadband was connected.
>>>>
>>>> What I *may* have done wrong was to have a microfilter in the wrong
>>>> place
>>>> such that the modem connection was not filtered.
>>>>
>>>> The router logs show several line drops and the low connection speed.
>>>>
>>>> My connection is now stable but at 600kbps.
>>>> The router shows Noise Margin of 28 rather than the usual 7dB
>>>>
>>>> I suspect the BRAS profile has gone really low.
>>>>
>>>> How long will it take to come back to normal?
>>>> Is there anything I can do?
>>
>>
>>
>>> Ask you ISP to reset it. The line will then go through the same process as
>>> with a new ADSL installation.
>>> Peter Crosland
>>
>>
>> Thanks, Peter - I will try that - though my ISP is Pipex and so they may
>> not understand!
>>
>> Can the ISP do the reset - or do they have to ask BT to do it?
>
> RESET YOUR ROUTER AND WAIT A DAY OR TWO FIRST.
> IT MAY BE ALL YOU NEED TO DO.

No, he doesn't need to reset the router yet again if it's now
functioning OK.

Better to leave it running.

Resetting it will will just add another blip to the monitoring system at
the exchange which could slow down recovery.

Rgds

Denis McMahon