Wiring phone extension directly to phone line

[McGraw]

Hi.

I need to directly connect a blue/white orange/white etc. phone line to an extension that has yellow, green, red and black.

Is this possible and how do I match up?

Have searched the internet to no avail.

Thanks a lot.

 

[sparkymarka]

hi sounds like someone has used alarm cable look on back of socket connect blue/ white to 2 white/ blue to 5 orange/ white to 3 the blue/white and white blue are normally the middle two but i have seen some other configerations.

 

[Paul_C]

It might be alarm cable, but with those colors it might also be flat modular telephone cord. Red/green/black/yellow are the standard cord colors which have been used in North America for many years, with red/green as the first pair and black/yellow the second.

Some of the cheap Far Eastern extension kits sold in Britain now use the same cordage with U.K. connectors. If a BT431A plug is crimped directly to the end of the cord, then the line will end up on the black/yellow pair, with the bell feed/shunt on either red or green. But some other kits connect only two wires, using the red/green pair. There's no way to be sure without further investigation.

 

[McGraw]

Thanks.

Based on your best guess, which colours would you reccomend trying to connect together first?

 

[McGraw]

Sussed it thanks.

Black Red Green Yellow are 2345 respectively

 

[Paul_C]

Black Red Green Yellow are 2345 respectively

If this is flat modular cord with a BT431A plug on the end to connect it, just be aware that the sequence might be the opposite way round. A phone will still mostly work with the line (2 & 5) swapped, but might not ring on incoming calls without the ringer feed (3). Many new phones don't use this third wire now anyway though.

 

[bernardgreen]

If this is flat modular cord with a BT431A plug on the end to connect it, just be aware that the sequence might be the opposite way round.

And possibly it is multi-stranded wire which will not connect properly into IDC ( punch down ) connectors. It will probably work for a few days and then fail.