ADSL Fault Finding

I have got my internet service and although i am predicted from BT to
have a line Speed of 7Mbps becuase i live about 400M away from the
exchange and wiring is pretty short i can only manage to get 1Mbps. I
have had BT come and they have checked the line and they insist that
the Speed coming to my house is 6Mbps after they cam into my house and
tested the line. While they were testing the line i checked the router
which still reported 1267Kbps. I know this is a problem in the wiring
in my house.I had the house done up just a year ago and new phone
cables and electrical cables, plumbing, carpets, plastering and a new
extension done. So a new house virually. I have check the wiring and
they are connected correctly after i saw that the wiring was wrong at
first. I then changed the face plates on all of them. No luck. But at
the master socket i get full speed. I would put it by the master socket
only problem is the siginal does no get to my desktop PC which is at
the other side of the house.
Does anyone know what i could be if the wiring is correct, all the face
plates are new, all the phones work, connectivity is fine.
Thanx

> Does anyone know what i could be if the wiring is correct, all the face
> plates are new, all the phones work, connectivity is fine.
> Thanx


Well something is amiss so I would start by seeing what affect unplugging
all the phones would have, including fax machines skyboxes etc.

Then disconnect each face plate in turn and if still no improvement each leg
of the internal cabling.

Just work your way through methodically until you see the problem clear,
perhaps run a temporary cable from the master socket to the socket at the
modem/router.

Fred

The Simpsons wrote:
> > Does anyone know what i could be if the wiring is correct, all the face
> > plates are new, all the phones work, connectivity is fine.
> > Thanx
>
>
> Well something is amiss so I would start by seeing what affect unplugging
> all the phones would have, including fax machines skyboxes etc.
>
> Then disconnect each face plate in turn and if still no improvement each leg
> of the internal cabling.
>
> Just work your way through methodically until you see the problem clear,
> perhaps run a temporary cable from the master socket to the socket at the
> modem/router.
>
> Fred

Believe me i have tried it. I removed everything and by that i
disconnected every single extension unitl i only had one of them
connected.same problem. I have narrowed it down to either one of two
problems. Either the is somthing wrong with the phone cabe i am using
for the extension sockets or bad connection. While the house was bieng
done one of the builders decided he would make life hard for the
electrician by buring the Junction box for the phone line under the
stair floorboards. Now either that connection has become bad and wont
let the full frequency of broadband siginals through or the cable. What
requirements are thier for the cable and is it a viable explanation to
the problem

>>> Does anyone know what i could be if the wiring is correct, all the
>>> face plates are new, all the phones work, connectivity is fine.
>>> Thanx
>>
>>
>> Well something is amiss so I would start by seeing what affect
>> unplugging all the phones would have, including fax machines
>> skyboxes etc.
>>
>> Then disconnect each face plate in turn and if still no improvement
>> each leg of the internal cabling.
>>
>> Just work your way through methodically until you see the problem
>> clear, perhaps run a temporary cable from the master socket to the
>> socket at the modem/router.
>>
>> Fred
>
> Believe me i have tried it. I removed everything and by that i
> disconnected every single extension unitl i only had one of them
> connected.same problem. I have narrowed it down to either one of two
> problems. Either the is somthing wrong with the phone cabe i am using
> for the extension sockets or bad connection. While the house was bieng
> done one of the builders decided he would make life hard for the
> electrician by buring the Junction box for the phone line under the
> stair floorboards. Now either that connection has become bad and wont
> let the full frequency of broadband siginals through or the cable.
> What requirements are thier for the cable and is it a viable
> explanation to the problem

My guess is that whoever did the wiring used bell wire rather than the
proper CW1308 twisted pair specified by BT. Details here

http://www.adslnation.com/support/cables.php


Peter Crosland

"naza" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed) ups.com...
>
> The Simpsons wrote:
>> > Does anyone know what i could be if the wiring is correct, all the face
>> > plates are new, all the phones work, connectivity is fine.
>> > Thanx
>>
>>
>> Well something is amiss so I would start by seeing what affect unplugging
>> all the phones would have, including fax machines skyboxes etc.
>>
>> Then disconnect each face plate in turn and if still no improvement each
>> leg
>> of the internal cabling.
>>
>> Just work your way through methodically until you see the problem clear,
>> perhaps run a temporary cable from the master socket to the socket at the
>> modem/router.
>>
>> Fred
>
> Believe me i have tried it. I removed everything and by that i
> disconnected every single extension unitl i only had one of them
> connected.same problem. I have narrowed it down to either one of two
> problems. Either the is somthing wrong with the phone cabe i am using
> for the extension sockets or bad connection. While the house was bieng
> done one of the builders decided he would make life hard for the
> electrician by buring the Junction box for the phone line under the
> stair floorboards. Now either that connection has become bad and wont
> let the full frequency of broadband siginals through or the cable. What
> requirements are thier for the cable and is it a viable explanation to
> the problem
>

This seems odd to me. My limited experience is that you either connect at
the speed BT have given you or you don't connect at all. Maybe ADSL Max is
different.

Anyway maybe the extension wiring is just too long and is causing
reflections. You could try changing from a microfilter on each phone socket
to a splitter faceplate on the master socket and separate wiring from the
master socket to your modem or router.

--

Brian Gregory. (In the UK)
(E-Mail Removed)
To email me remove the letter vee.

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

> Does anyone know what i could be if the wiring is correct, all the face
> plates are new, all the phones work, connectivity is fine.

Phone systems have an A and a B wire, these often get reversed
somewhere after the master socket. Particularly with cowboy
builders, electricians as sub-contractors doing phone wiring
at the same time, in hotels office blocks etc.
The phones work fine it's just that some other devices don't.
I use a pocket Eaglehawk tester, LED's show polarity, dial
tone, loop voltage.
Filters can also cause problems, some generic cheap ones
can be the source of problems.
Wrong cable after master socket.
Wiring stubs (many, often unused, radials in parallel off the
master socket).
Get a length of twisted pair and make a long extension
lead, use this in place of the installed wiring for a similar
distance. If it works that's your answer.

In message <(E-Mail Removed). com>, naza
<(E-Mail Removed)> writes
>
>The Simpsons wrote:
>> > Does anyone know what i could be if the wiring is correct, all the face
>> > plates are new, all the phones work, connectivity is fine.
>> > Thanx
>>
>>
>> Well something is amiss so I would start by seeing what affect unplugging
>> all the phones would have, including fax machines skyboxes etc.
>>
>> Then disconnect each face plate in turn and if still no improvement each leg
>> of the internal cabling.
>>
>> Just work your way through methodically until you see the problem clear,
>> perhaps run a temporary cable from the master socket to the socket at the
>> modem/router.
>>
>> Fred
>
>Believe me i have tried it. I removed everything and by that i
>disconnected every single extension unitl i only had one of them
>connected.same problem. I have narrowed it down to either one of two
>problems. Either the is somthing wrong with the phone cabe i am using
>for the extension sockets or bad connection. While the house was bieng
>done one of the builders decided he would make life hard for the
>electrician by buring the Junction box for the phone line under the
>stair floorboards. Now either that connection has become bad and wont
>let the full frequency of broadband siginals through or the cable. What
>requirements are thier for the cable and is it a viable explanation to
>the problem
>
Check the colour coding of the circuits very carefully.

If the electrician has split a twisted pair, so that the ADSL signal is
being carried by one wire from each of two pairs you will get the
symptoms you describe.
--
Invalid

naza wrote:
> I have got my internet service and although i am predicted from BT to
> have a line Speed of 7Mbps becuase i live about 400M away from the
> exchange and wiring is pretty short i can only manage to get 1Mbps. I
> have had BT come and they have checked the line and they insist that
> the Speed coming to my house is 6Mbps after they cam into my house and
> tested the line. While they were testing the line i checked the router
> which still reported 1267Kbps. I know this is a problem in the wiring
> in my house.I had the house done up just a year ago and new phone
> cables and electrical cables, plumbing, carpets, plastering and a new
> extension done. So a new house virually. I have check the wiring and
> they are connected correctly after i saw that the wiring was wrong at
> first. I then changed the face plates on all of them. No luck. But at
> the master socket i get full speed. I would put it by the master socket
> only problem is the siginal does no get to my desktop PC which is at
> the other side of the house.
> Does anyone know what i could be if the wiring is correct, all the face
> plates are new, all the phones work, connectivity is fine.
> Thanx
>
You could always buy an ADSL filter faceplate and run a cat 5 to your
computer room, have a look on ADSL-Filters.co.uk

Eddy


--
Add me

Xbox live :- DTfan

Wii number :- 7296 3401 5018 5500

On Mon, 22 Jan 2007 23:23:43 -0000, "Brian Gregory [UK]"
<(E-Mail Removed)> wrote:

>This seems odd to me. My limited experience is that you either connect at
>the speed BT have given you or you don't connect at all. Maybe ADSL Max is
>different.

it is, it rate adapts to meet a target SNR margin. Bad wiring or poor
filtering will drop the speed to a small fraction of what it would
otherwise be.

Phil

Invalid wrote:

> If the electrician has split a twisted pair, so that the ADSL signal is
> being carried by one wire from each of two pairs you will get the
> symptoms you describe.

Agreed. It sounds very much like a untwisted cable problem.

Ted.