Router synch rate & IP profile

Hi

According to the BT speed tester my IP profile is 6000 kbps even though
my router has been synching rock solid at 9848 kbit/sec for well over
a week (see data below).

Shouldn't the IP Profile be higher than this?
Has some setting got stuck somewhere?

BT Speed Test results:
* IP profile for your line is - 6000 kbps
*** DSL connection rate: 448 kbps(UP-STREAM)**7616 kbps(DOWN-STREAM)
*** Actual IP throughput achieved during the test was - 5269 kbps

Router results:
Attainable line rate : 9848 kbit/sec
Attainable Atm rate : 8768 kbit/sec
Used line rate : 8600 kbit/sec
Fast used Atm rate : 0 kbit/sec
Interleaved used Atm rate : 7616 kbits/sec
Rel. capacity occupation : 87
Noise Margin : 9 dB
Line attenuation : 22 dB
Output Power : 19 dBm


Kit

Kit wrote:
> Hi
>
> According to the BT speed tester my IP profile is 6000 kbps even though
> my router has been synching rock solid at 9848 kbit/sec for well over
> a week (see data below).
>
> Shouldn't the IP Profile be higher than this?

Your IP profile will never exceed around 7500kbps due to overheads. It
also appears to me that your kit is synchronised at 7616kbps, not
9848kbps (which would only be attainable using ADSL2+ technologies).

Rgds,

--
|Bob Pullen Broadband Solutions for
|Support Home & Business @
|PlusNet plc. www.plus.net
+------ PlusNet - The smarter way to Internet! ------

In article <(E-Mail Removed)>, PlusNet Support Team
<(E-Mail Removed)> wrote:

> Kit wrote:
> > Hi
> >
> > According to the BT speed tester my IP profile is 6000 kbps even though
> > my router has been synching rock solid at 9848 kbit/sec for well over
> > a week (see data below).
> >
> > Shouldn't the IP Profile be higher than this?
>
> Your IP profile will never exceed around 7500kbps due to overheads. It
> also appears to me that your kit is synchronised at 7616kbps, not
> 9848kbps (which would only be attainable using ADSL2+ technologies).
>
> Rgds,

Even if it were synched only at at 7616, shouldn't the IP profile be
more than 6000?

Also, what then is the meaning of the figure of 9848 given by the
router? If it is the synch rate before 'overheads' are subtracted
then is the IP profile of 6000 the data transmission speed with or
without counting the overheads?

Kit

On 07/10/2007 13:55, Kit wrote:

> Even if it were synched only at at 7616, shouldn't the IP profile be
> more than 6000?

I believe that line synch at 7392K or higher should give you 6.5MB IP
profile.

> Also, what then is the meaning of the figure of 9848 given by the
> router?

It seems to say it thinks 9848K should be "attainable" not that it has
actually connected at that speed, but without ADSL2+ equipment at the
other end you'll never know if what it thinks is right or not.

On Sun, 07 Oct 2007 13:55:49 +0100, Kit wrote:

>> Your IP profile will never exceed around 7500kbps due to overheads. It
>> also appears to me that your kit is synchronised at 7616kbps, not
>> 9848kbps (which would only be attainable using ADSL2+ technologies).
>>
>> Rgds,
>
>Even if it were synched only at at 7616, shouldn't the IP profile be
>more than 6000?
>
>Also, what then is the meaning of the figure of 9848 given by the
>router? If it is the synch rate before 'overheads' are subtracted
>then is the IP profile of 6000 the data transmission speed with or
>without counting the overheads?

I'm guessing that those high figures are what could be obtained from
your line with a margin of 0. You don't really want your margin to be
below 9 because you would probably get dropouts and errors then.

A sync rate of 7313 should give an IP rate of about 6.5 meg according
to the table here http://aaisp.net.uk/maxatm.html (bottom of page) but
you would need to have been above 7392 for a few days for that to
happen and to never drop below. Since you are only getting 5269 kbps,
probably due to contention further up the line, it's unlikely to make
any difference to you anyway. Does your modem have any logs so that you
can see if the sync rate for your connection changes?

You will get the best rate by splitting out your ADSL from the phone
line at the master socket and sending just phone signals to any
extensions or even using better filters if you have cheap ones. That's
an entirely different bag of worms that you may not want to open though
:-)

I'm assuming you are on MAX via BT, if you are on someones LLU they may
well have their own rates and rules.

--
Regards - Rodney Pont
The from address exists but is mostly dumped,
please send any emails to the address below
e-mail ngpsm4 (at) infohitsystems (dot) ltd (dot) uk

In article <atcfzvasbuvgflfgrzfygqhx.jpk2ds1.pminews@ouse>, Rodney Pont
<(E-Mail Removed)> wrote:

> A sync rate of 7313 should give an IP rate of about 6.5 meg according
> to the table here http://aaisp.net.uk/maxatm.html (bottom of page) but
> you would need to have been above 7392 for a few days for that to
> happen and to never drop below. Since you are only getting 5269 kbps,
> probably due to contention further up the line, it's unlikely to make
> any difference to you anyway. Does your modem have any logs so that you
> can see if the sync rate for your connection changes?
>
> You will get the best rate by splitting out your ADSL from the phone
> line at the master socket and sending just phone signals to any
> extensions or even using better filters if you have cheap ones. That's
> an entirely different bag of worms that you may not want to open though
> :-)
>
> I'm assuming you are on MAX via BT, if you are on someones LLU they may
> well have their own rates and rules.

Hi,

Thanks for the response.

The BT speed test I quoted was just the one I got that morning. The
average speed I get is a bit over 5,500 and the max is just under
6,000. I'm not really complaining about speed (it is good enough for
me) but was just trying to understand all the different numbers - e.g.
is the IP profile number before or after 'overheads'.

The router is plugged directly into the master socket ADSL faceplate
installed by BT and there is only one phone plugged into it and no
extensions. AFAIK my router (an old speedtouch pro) doesn't have a log.
I am on BT Max with Entanet (UKFSN as reseller).

Kit

Kit wrote:

> In article <atcfzvasbuvgflfgrzfygqhx.jpk2ds1.pminews@ouse>, Rodney Pont
> <(E-Mail Removed)> wrote:
>
> > A sync rate of 7313 should give an IP rate of about 6.5 meg according
> > to the table here http://aaisp.net.uk/maxatm.html (bottom of page) but
> > you would need to have been above 7392 for a few days for that to
> > happen and to never drop below. Since you are only getting 5269 kbps,
> > probably due to contention further up the line, it's unlikely to make
> > any difference to you anyway. Does your modem have any logs so that you
> > can see if the sync rate for your connection changes?
> >
> > You will get the best rate by splitting out your ADSL from the phone
> > line at the master socket and sending just phone signals to any
> > extensions or even using better filters if you have cheap ones. That's
> > an entirely different bag of worms that you may not want to open though
> > :-)
> >
> > I'm assuming you are on MAX via BT, if you are on someones LLU they may
> > well have their own rates and rules.
>
> Hi,
>
> Thanks for the response.
>
> The BT speed test I quoted was just the one I got that morning. The
> average speed I get is a bit over 5,500 and the max is just under
> 6,000. I'm not really complaining about speed (it is good enough for
> me) but was just trying to understand all the different numbers - e.g.
> is the IP profile number before or after 'overheads'.
>
> The router is plugged directly into the master socket ADSL faceplate
> installed by BT and there is only one phone plugged into it and no
> extensions. AFAIK my router (an old speedtouch pro) doesn't have a log.
> I am on BT Max with Entanet (UKFSN as reseller).

The IP profile is 'what you get' to your PC. The overheads have already been
deducted.

Graham