Line Problem

I have a problem on my line and i need to rule out my house wiring but
i have one problem. The upload speed the my router connects at is
exactly half of what it should be and my download speed is not what it
should be either. I live very closed ot the exchange and a previous
line test showed that my line should be able to carry 17mbps. But i
get less than 2mbps downstream. The downstream could be a bad quality
line so that the higher frequencies are lost. But the upload should
not be affected becasue of the frequencies bieng below the downstream
on the line.

Downstream
Attenuation: 55db
Noise margin: 14db


Upstream
Attenuation: 29db
Noise margin: 14db


Does anyone know what could be the problem. I have tried plugging the
router in the socket behind the NTE5 master faceplate but the same
speeds. I have disconneted all the phones and other deivces so only
the router was on. Only difference was the the noise margin got better
to around 20db but the speeds were the same even though i changed the
SNR target manually to less than 6db.

naza wrote:

> I have a problem on my line and i need to rule out my house wiring but
> i have one problem. The upload speed the my router connects at is
> exactly half of what it should be and my download speed is not what it
> should be either. I live very closed ot the exchange and a previous
> line test showed that my line should be able to carry 17mbps. But i
> get less than 2mbps downstream. The downstream could be a bad quality
> line so that the higher frequencies are lost. But the upload should
> not be affected becasue of the frequencies bieng below the downstream
> on the line.
>
> Downstream
> Attenuation: 55db
> Noise margin: 14db
>
> Upstream
> Attenuation: 29db
> Noise margin: 14db
>
> Does anyone know what could be the problem. I have tried plugging the
> router in the socket behind the NTE5 master faceplate but the same
> speeds. I have disconneted all the phones and other deivces so only
> the router was on. Only difference was the the noise margin got better
> to around 20db but the speeds were the same even though i changed the
> SNR target manually to less than 6db.

Your figures aren't exactly what I'd expect for someone living close to the
exchange.

I had a similar problem a year ago. It turned out that BT had fitted an RF
filter on the line. When it was changed for a different type designed to pass
ADSL frequencies, I went from ~ 2700 kbps sync with regular disconnects to the
full bore 8128kbps that max dsl can provide.

Graham

On 21-Aug-2007, Eeyore <(E-Mail Removed)> wrote:

> > Does anyone know what could be the problem. I have tried plugging the
> > router in the socket behind the NTE5 master faceplate but the same
> > speeds. I have disconneted all the phones and other deivces so only
> > the router was on. Only difference was the the noise margin got better
> > to around 20db but the speeds were the same even though i changed the
> > SNR target manually to less than 6db.

Living near to the exchange doesn't mean a short route to the exchange.
Water in the underground plant (100-200 pair street cable)?
Any problem with voice calls.
Has it ever been faster?
How long have you had the service?
Dry joint in cable.
Very rare, but not unknown, split pairs.
Lightning struck ADSL modem/router.
You may have to try and get them to give you another
exchange pair.
As you are plugging into the NTE5 this should eliminate
the filter being duff or NTE5 being the problem?

On 21 Aug, 15:15, ato_...@hotmail.com wrote:
> On 21-Aug-2007, Eeyore <rabbitsfriendsandrelati...@hotmail.com> wrote:
>
> > > Does anyone know what could be the problem. I have tried plugging the
> > > router in the socket behind the NTE5 master faceplate but the same
> > > speeds. I have disconneted all the phones and other deivces so only
> > > the router was on. Only difference was the the noise margin got better
> > > to around 20db but the speeds were the same even though i changed the
> > > SNR target manually to less than 6db.
>
> Living near to the exchange doesn't mean a short route to the exchange.

True. But, cable length is not that much either according to BT, How
bad can the line quaulity be.
> Water in the underground plant (100-200 pair street cable)?

> Any problem with voice calls.
No Problems with voice calls
> Has it ever been faster?
No. Been like this ever since, i had it.

> How long have you had the service?
3 months

> Dry joint in cable.
> Very rare, but not unknown, split pairs.

> Lightning struck ADSL modem/router.
Tried another ADSL Modem, which i know worked

> You may have to try and get them to give you another
> exchange pair.

> As you are plugging into the NTE5 this should eliminate
> the filter being duff or NTE5 being the problem?
Yep. Only connected to the master socket and have tried without all
the extensions on.

On 21-Aug-2007, naza <(E-Mail Removed)> wrote:

> > As you are plugging into the NTE5 this should eliminate
> > the filter being duff or NTE5 being the problem?
> Yep. Only connected to the master socket and have tried without all
> the extensions on.

Well as you have tried another modem/router, connected directly to
the NTE5 it look as if the problem is outside your premises.

I presume it's a house, not a tower block, for the latter
you don't know what cowboys put in the wiring between
you. and the basement.
Which ISP? It's in cases like this where you find out
whether the customer service is any good, or a
don't care, don't fix anything rip-off.
Some will say you have a service, we don't guarantee
the speed.
Could be you have a long stub on the line, the self
capacity of which would knock down the available speed.
Checking for stubs and any non-standard equipment
should have part of provisioning.
Some modems have advanced diagnostics, mine has
ADSL spectrum analysis in it's diagnostices, could
be informative if yours has it.
I'd push for another exchange pair.
Any neighbours of the same cable with ADSL?
If so what's their speed like?
I presume your modem/router is hardwired, not wireless,
if there is a wireless link involved then it may not be a
line issue.
Something daft like a bell capacitor shunted across the
line would also clobber ADSL, but I'd expect it to affect
voice as well.

On 21 Aug, 19:22, ato_...@hotmail.com wrote:
> On 21-Aug-2007, naza <naza...@googlemail.com> wrote:
>
> > > As you are plugging into the NTE5 this should eliminate
> > > the filter being duff or NTE5 being the problem?
> > Yep. Only connected to the master socket and have tried without all
> > the extensions on.
>
> Well as you have tried another modem/router, connected directly to
> the NTE5 it look as if the problem is outside your premises.
>
> I presume it's a house, not a tower block, for the latter
> you don't know what cowboys put in the wiring between
> you. and the basement.
> Which ISP? It's in cases like this where you find out
> whether the customer service is any good, or a
> don't care, don't fix anything rip-off.
> Some will say you have a service, we don't guarantee
> the speed.
> Could be you have a long stub on the line, the self
> capacity of which would knock down the available speed.
> Checking for stubs and any non-standard equipment
> should have part of provisioning.
> Some modems have advanced diagnostics, mine has
> ADSL spectrum analysis in it's diagnostices, could
> be informative if yours has it.
> I'd push for another exchange pair.
> Any neighbours of the same cable with ADSL?
> If so what's their speed like?
> I presume your modem/router is hardwired, not wireless,
> if there is a wireless link involved then it may not be a
> line issue.
> Something daft like a bell capacitor shunted across the
> line would also clobber ADSL, but I'd expect it to affect
> voice as well.

ISP is Sky, not great customer service but persistance does seem to
work with them. The guy next door is on a upto 8 meg but no cable but
a guy around the corner on the next road get the max 8meg that his
package says.

"naza" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed) oups.com...
<snip>
The guy next door is on a upto 8 meg but no cable but
> a guy around the corner on the next road get the max 8meg that his
> package says.

I doubt it - 8 Meg is a theoretical maximum, including overheads, never
achievable in the real world.
If he had a direct cable into the BT exchange next door, he might get a
little over 7 Meg.
But does he and is it (next door)?

George

On 21 Aug, 20:27, "George Weston" <geowes...@googlemail.com> wrote:
> "naza" <naza...@googlemail.com> wrote in message
>
> news:(E-Mail Removed) oups.com...
> <snip>
> The guy next door is on a upto 8 meg but no cable but
>
> > a guy around the corner on the next road get the max 8meg that his
> > package says.
>
> I doubt it - 8 Meg is a theoretical maximum, including overheads, never
> achievable in the real world.
> If he had a direct cable into the BT exchange next door, he might get a
> little over 7 Meg.
> But does he and is it (next door)?
>
> George

>The guy next door is on a upto 8 meg but on cable but
Spelling mistake sorry.

The other guy is on the other road, i am a corner house and he is just
round the corner to the next road literally. And he syncs at 8128kbps.
the actually amound he get varies throughout the day. I dont sync at
anywhere close to the rate.

On 22-Aug-2007, naza <(E-Mail Removed)> wrote:

> The other guy is on the other road, i am a corner house and he is just
> round the corner to the next road literally. And he syncs at 8128kbps.
> the actually amound he get varies throughout the day. I dont sync at
> anywhere close to the rate.

Your ISP should have BT's stats, I can view mine on-line

Line rate data
Upstream Downstream Sync Rate BRAS Profile Interleave Sync Date Date
0 2000 2272 adsl2000 Auto 20-Aug-2007 21:54:22 20-Aug-2007 21:54:22
0 2500 2848 adsl2500 Auto 20-Aug-2007 16:04:38 20-Aug-2007 16:04:38
448 3500 4000 adsl3500 Auto 20-Aug-2007 15:36:18 20-Aug-2007 15:36:18
0 1750 2016 adsl1750 Auto 18-Aug-2007 20:28:05 18-Aug-2007 20:28:05
0 2500 2848 adsl2500 Auto 14-Aug-2007 22:14:32 14-Aug-2007 22:14:32
0 3000 3424 adsl3000 Auto 10-Aug-2007 21:14:47 10-Aug-2007 21:14:47
448 4000 4544 adsl4000 Auto 10-Aug-2007 11:40:57 10-Aug-2007 11:40:57

Slightly munged, but clear enough to see it can vary a lot.
Get these figures from your ISP or get a better ISP.

By the way if you have an old USRobotics (now 3-Com) Courier dialup modem,
most of them
(the later plug and pray ones) give you a line frequency response readout,
where you can
see lines rolloff beyond around 4KHz, for better lines the rolloff starts
around 8KHz. They
used to be very useful for checking out lines.

<(E-Mail Removed)> wrote in message
news:46cc49b0$0$13939$(E-Mail Removed)...
>
> On 22-Aug-2007, naza <(E-Mail Removed)> wrote:
>
>> The other guy is on the other road, i am a corner house and he is just
>> round the corner to the next road literally. And he syncs at 8128kbps.
>> the actually amound he get varies throughout the day. I dont sync at
>> anywhere close to the rate.
>
> Your ISP should have BT's stats, I can view mine on-line
>
> Line rate data
> Upstream Downstream Sync Rate BRAS Profile Interleave Sync Date Date
> 0 2000 2272 adsl2000 Auto 20-Aug-2007 21:54:22 20-Aug-2007 21:54:22
> 0 2500 2848 adsl2500 Auto 20-Aug-2007 16:04:38 20-Aug-2007 16:04:38
> 448 3500 4000 adsl3500 Auto 20-Aug-2007 15:36:18 20-Aug-2007 15:36:18
> 0 1750 2016 adsl1750 Auto 18-Aug-2007 20:28:05 18-Aug-2007 20:28:05
> 0 2500 2848 adsl2500 Auto 14-Aug-2007 22:14:32 14-Aug-2007 22:14:32
> 0 3000 3424 adsl3000 Auto 10-Aug-2007 21:14:47 10-Aug-2007 21:14:47
> 448 4000 4544 adsl4000 Auto 10-Aug-2007 11:40:57 10-Aug-2007 11:40:57
>
> Slightly munged, but clear enough to see it can vary a lot.
> Get these figures from your ISP or get a better ISP.

There is no reason Sky should have BT stats.
Sky use LLU where they can so there would be no BT stats then.

Sky and BT probably use the same DSLAMs (most are the same) so they will
have line stats available but they may not be the same as BT or even give
them to you.