Phone line extension help required

hobo28

Hi all

I've had a new phone line fitted by a BT engineer. I also want an extension the other side of the house. I convinced the engineer to leave me with some extra cable which I have run round front of the house. To save time, I have cable tied it to the aerial cable which is also running to the same place.

On the master socket, I have connected pins 2,3,4 & 5. On the slave socket, the same. The problem is that on the slave socket, when using the phone there is significant background noise which isn't there when I use the master socket.

Any ideas what this could be?

Thanks

lee634

OK actually the only wires that need to be connected are 2 & 5
3&4 were used years ago to produce the phone ring when that came from the exchange,

try swapping 2&5 over at one end to see if that makes a diiference,
also there is a possibility that you may have an old telephone line cominginto the house, which has a lot of loss, so when you add the extension you get even more loss on the line,
BT can do a check on your line,
get an answer from them anything higher than 63dB's to your main BT socket and an extension will be noisy

This is whats happening with my line

lee634

a way of reducing loss on the extension is to make sure the cable is twisted pair cable and not the flat stuff that you sometime get

espresso

hobo28 wrote:

Hi all

I've had a new phone line fitted by a BT engineer. I also want an extension the other side of the house. I convinced the engineer to leave me with some extra cable which I have run round front of the house. To save time, I have cable tied it to the aerial cable which is also running to the same place.

On the master socket, I have connected pins 2,3,4 & 5. On the slave socket, the same. The problem is that on the slave socket, when using the phone there is significant background noise which isn't there when I use the master socket.

Any ideas what this could be?

Thanks

As you have used cable 'supplied' by the engineer, I would guess that you have wired the wrong colours to pins 2,3,4, & 5. The twisted pairs reduces noise pick-up, so it is important.

The line in on pins 2 & 5 and this should be one of the twisted pairs, usually the blue/white and white/blue.

See here for a full explanation.

sicker

I think you may need 2,3 & 5. 3 is needed for some signaling purposes.

John

hobo28

espresso wrote:

As you have used cable 'supplied' by the engineer, I would guess that you have wired the wrong colours to pins 2,3,4, & 5. The twisted pairs reduces noise pick-up, so it is important.

The line in on pins 2 & 5 and this should be one of the twisted pairs, usually the blue/white and white/blue.

See here for a full explanation.

I've connected pins 2 & 5 now using the same colours as the engineer has done with the master socket but its still the same. The colour scheme isn't the standard but instead I have orange, white, black and green. I have used orange and white like the engineer.

I am beginning to wonder if the cable is twisted pairs at all. I can't see any twists in the cable.

Thanks

wonderfullife_2

Hi
I don't know if this will help, just a site I came across the other day.

http://www.dslzoneuk.net/socket.php

Coveredinbees!!!!

The pairs aren't tightly twisted the twist is about every 4 or 5 inches so it's not easy to see unless you strip a bit back. Have you tried a different phone ?

yelac21271

As per other peoples replies you will need 2, 5 which will be blue/white and white blue respectivley and also 3 orange white for ringing purposes.

hobo28

I think its the cable the engineer left me. I also ran a network cable (Cat 5) round the house at the same time as the phone cable. I connected the network cable to pins 2 & 5 on both the master socket and the extension and the hissing noise went away. Think I will have to get another cat 5 cable and replace the cable the engineer left me.