Demarcation wiring help

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Disrespective

1924 posts

Uber Geek

#195432 20-Apr-2016 08:48

I've searched around and I think I know the answer to this, but would like some clarification if at all possible.

In my demarcation box I have a 4 wire black cable coming into the box. It has brown/yellow/black/white wires inside.

The black/yellow pair are left un-terminated free in the box.

The brown/white pair are hooked up to a couple of white phone cables into the house.

I want to run a new cat6 cable (because I don't have any alternative cable lying around) back to my comms cupboard but don't want to connect the wrong pair at the demarcation box.

I had planned on connecting the cat6 blue/blueWhite pair to the demarcation cable's brown/white and don't think the polarity of the wires matters. eg brown-to-blue or brown-to-blueWhite will work the same. Is this correct?

PoHq

465 posts

Ultimate Geek

#1536249 20-Apr-2016 08:58

Yup. You have it correct. Blue white of cat cable to brown White of the black service cable.

Polarity doesn't matter.

Sharesies

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trig42

5801 posts

Uber Geek

ID Verified

#1536251 20-Apr-2016 09:01

You should whack a DSL filter in there while you are doing it, then run voice down the blue/white pair of the CAT6 cable, and Data down the orange/white or green white.

PoHq

465 posts

Ultimate Geek

#1536253 20-Apr-2016 09:03

Agree. Throw a filter in for sure if you are doing it.

Disrespective

1924 posts

Uber Geek

#1536254 20-Apr-2016 09:05

Thanks guys.

I've got a ST2206 and filter I was going to install in the cupboard. That should cover me I believe.

trig42

5801 posts

Uber Geek

ID Verified

#1536263 20-Apr-2016 09:17

So long as you put the filter before any branches off the line. You say currently the demark has a couple of internal cables going from it into the house - are you deleting these altogether?

Disrespective

1924 posts

Uber Geek

#1536293 20-Apr-2016 09:49

Yeah, no existing internal wiring will remain in place. I'm using it to pull new cat6 to the same points.

Aredwood

3885 posts

Uber Geek

#1536514 20-Apr-2016 12:39

While you are working in the demark point. Connect the yellow black pair to the orange white pair of the cat6. So if you ever need to switch to the other pair. It is already linked to your comms cupboard.

Disrespective

1924 posts

Uber Geek

#1536629 20-Apr-2016 13:51

Good call. Thanks

Disrespective

1924 posts

Uber Geek

#1537023 20-Apr-2016 21:15

Just a quick update that aside from crawling around under my house in the dark with the rats and mice, it all now works marvellously. 11 down and 1 up on a standard DSL connection. Happy chappy.

webwat

2036 posts

Uber Geek

Trusted

#1538432 22-Apr-2016 21:22

Disrespective:

Thanks guys.

I've got a ST2206 and filter I was going to install in the cupboard. That should cover me I believe.

Are you saying the filter is a plugin type? Its better to put a master splitter into the demarc "ETP", theres no point putting a filter on the modem -- its job is actually to filter the phones. For this reason you need to split the white phone cables off at the demarc with the wired in type of filter. They are labelled with which wires to use for each cable. You will need two 3-way scotchloks for the 2 phone cables and four normal scotchloks. The wires go all the way into the scotchlok and crimp down hard, dont strip the wires at all.

Time to find a new industry!