Is this my Demarc Point

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cruxis

482 posts

Ultimate Geek

#126847 22-Jul-2013 11:10

Trying to trace my phone wiring, The phone line comes from the telephone pole into the house roof space through the roof space, then ends up at this point. In hallway. Then comes out the bottom grey cable off to the telephone jack 1.8m away. There are no other connections from the telephone pole outside untill it gets to this box in the hallway. Not even on the outside of the house, Line comes straight to this.

There is 50 volts DC between the 2 wires, and those fuse like things. I assume the signal goes through those fuse things.

There is only a Single Jackpoint in whole house 1.5 meters below this point in photos.

Connection is Naked VDSL. House built 1942.

Can I remove this and connect the 2 black wires up to a jackpoint and plug the router in there.

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2834 posts

Uber Geek

Subscriber

#863487 22-Jul-2013 12:26

So you already have VDSL service with reasonable speed?

Would this be an old 'bell'?

chevrolux

4962 posts

Uber Geek
Inactive user

#863496 22-Jul-2013 12:45

That is a lightning arrestor.
Going from the photo your lead in is an old twisted black cable. These are bad for DSL and should be replaced with a proper 2-pair 049.

You can bypass the lightning arrestor and run a cable right out to where the lead in terminates on the house.

cruxis

482 posts

Ultimate Geek

#863573 22-Jul-2013 13:42

Yes my leadin is that black twisted pair. I Can't replace that line it goes through the house roof space out to the pole, down the pole into cabinet.

So I can Remove the lightning arrestor. Hook the black pair twisted pair to a Jack and plug router straight there.

I get good vdsl. But only because I right next to the cabinet.

Bung

6489 posts

Uber Geek

Subscriber

#863593 22-Jul-2013 14:10

cruxis: Yes my leadin is that black twisted pair. I Can't replace that line it goes through the house roof space out to the pole, down the pole into cabinet.

So I can Remove the lightning arrestor. Hook the black pair twisted pair to a Jack and plug router straight there.

I'm surprised you've still got that line going all the way to the pole. In Strathmore the aerials were proactively changed and an external ternination point stuck on the house about 10 years ago.

You can't terminate the black pair to a jack properly as it's too heavy. Use Scotchlocs or similar to drop the wire size down.

sbiddle

30853 posts

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Biddle Corp

Lifetime subscriber

#863598 22-Jul-2013 14:23

I'm assuming you opted for a DIY VDSL2 install prior to wiring being mandatory?

Those arrestors really do kill xDSL signals, I'm quite surprised your sync rate is as high as it is.

Bung

6489 posts

Uber Geek

Subscriber

#863607 22-Jul-2013 14:33

That one has been stripped back to just fuses, no earth or carbons.

chevrolux

4962 posts

Uber Geek
Inactive user

#863659 22-Jul-2013 15:32

I would have thought there would be some decent roof space being a 1940's house.

The best option for you would use the old twisted black cable to draw a new Cat5e up the wall in to the roof space and then run the Cat5e out to where the aerial terminates.
Then call Chorus and get them to replace the drop lead with 049. They will put an ETP at the point of entry on the house.

As others have mentioned, I am surprised you get that good a sync rate with that old cable. Must be quite close to the cabinet.

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cruxis

482 posts

Ultimate Geek

#864472 23-Jul-2013 16:57

Well I removed the lightning arrestor and put some cat5 in the wall Right up to the roof space almost to where it leaves the house out to the pole. My Attenuation went up for 3db to 19db!

I took some photos of how I connected it, I assume the gauge on the telephone line is to thick for the connectors? Which caused my problem

Heres the what the line looks like in roof space that goes to pole and down to a cabinet.

Heres how I connected it to my cat5 to the line.

So anyways I put the lightning arrestor back in the line and connected the cat5 to that fixed my attenuation down to 2db. So I have improved 1db. I want to removed it and do it properly, What sort of connectors should I purchase

Results with Arrestor still in line are still good though.

ubergeeknz

3344 posts

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Vocus

#864477 23-Jul-2013 17:00

Why did you put the lightning arrestor back in? edit: Oh, I see.

You should probably get someone in to do it, or get that lead-in replaced.

linw

2849 posts

Uber Geek

#864658 23-Jul-2013 21:12

Looks good like it is!!

Goosey

2834 posts

Uber Geek

Subscriber

#864664 23-Jul-2013 21:20

From those photos of the scotchlocs, its a bit hard to see but for the incomming wire (exisiting chunky ones), did they actually fit into the scotchlocs all the way in until it was able to be crimped down?

Have you tried googling "surface mount jack" and click images.

dolsen

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#864838 24-Jul-2013 09:06

What happens if, instead of having the cat5 cable on the other end of the lightning arrester, you put both the incoming and cat 5 cable on the same screw down connectors at one end of the arrester. Probably a good idea to remove the fuse like devices so that you are just using it as a connection point?

cyril7

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#864885 24-Jul-2013 10:30

You really need to replace the old cloth insulated trurip its not a 100ohm transmission line so will results in pretty high reflections that will kill lots of bins. fortunately for you, your attenuation is so low its still working ok, but not optimally.

Cyril

cruxis

482 posts

Ultimate Geek

#869173 31-Jul-2013 11:37

How do Go I go about getting chorus to replace my Old 1 pair Trurip leadin cable, when there is no faults, and my VDSL is excellent. I assume when they do remote checks they going to see no problems.

Line attenuation of 2-3db, Sync of 40/10, No Disconnects, SNR 12-13db. 0 Errors,

Its just not optimal.

Zeon

3916 posts

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#869175 31-Jul-2013 11:38

Is it worth testing your modem at the outside mushroom to see if there will be any advantage?

Speedtest 2019-10-14

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