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  Reply # 1638201 21-Sep-2016 13:08
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Hi guys,

 

I recently decided to check my wiring in terms of ADSL speed and I discovered quite interesting things:
I opened that box where a phone line comes into my house and there are four wires connected to my house (my internal cabling seems to be made of Cat5e/6 cable).

 

Kind of wondering why they provided four wires when only two wires are required for a phone and BB? (they are blue and white BTW)
Also on two wires (one pair - black and red) I found a ~48 VDC (+/-) to be presented and they were actually not patched to a wall socket.

 

So to summarize - four wires from underground are connected to four wires that go into the house. Two of them are patched to a wall socket and used for BB, the others two are NOT patched and just left wrapped around the Cat5e/6 cable in a wall socket but the have +48 VDC.

 

I also found that white cylinder attached to only one single wire. What is that - capacitor? Shouldn't it be connected to two wires? Should I reconnect it back (probably to a white cable?)

 

 

 

Can all the above make negative impact on my BB speed (I am on naked plan so no PSTN)?
Currently it is:
Upstream   Bitrate Fast        : 0 kbps
Downstream Bitrate Fast        : 0 kbps
Upstream   Bitrate Interleaved : 1128 kbps
Downstream Bitrate Interleaved : 10122 kbps
Downstream Noise Margin        : 6.000 dB (48 1/8dB)
Upstream   Noise Margin        : 5.5 dB (44 1/8dB)
Downstream Transmit Power      : 19.9 dBm
Upstream   Transmit Power      : 12.4 dBm
Downstream Attenuation         : 29 dB
Upstream   Attenuation         : 17 dB

 

 

 

I found a DSL calculator which told me that based on line attenuation I should be getting around 14Mb/s.

 

There are no other phone sockets there or at least I could not find them, but I live in a rented house so can't be 100% sure.

 

 

 

Thank you.

 

Click to see full size

 

 

 

 


cisconz
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  Reply # 1638240 21-Sep-2016 14:34
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You would have had a second line at some point that is still connected at the Cabinet / Exchange.

 

The "White Cylinder" can be removed.





Hmmmm


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  Reply # 1638258 21-Sep-2016 15:05
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Also, damn, necro much?


neb

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  Reply # 1638338 21-Sep-2016 18:24
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If your landlord doesn't mind, you can go ahead and disconnect everything except the one pair you need. I did that at my place, there was a spaghetti of at least seven lines hacked in that went to sockets and whatnot all over the house, or possibly nowhere in some cases. Since I'm on naked DSL I just cut the wire before it even reached the junction box and ran a line directly to the ADSL router. Doesn't need a filter or splitter or anything, it's just straight from the street into the router.

neb

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  Reply # 1638339 21-Sep-2016 18:24
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ubergeeknz:

Also, damn, necro much?

 

 

That's because he cares...

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  Reply # 1638341 21-Sep-2016 18:30
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neb: If your landlord doesn't mind, you can go ahead and disconnect everything except the one pair you need. I did that at my place, ...

 

So did it make your ADSL any better?


neb

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  Reply # 1638342 21-Sep-2016 18:35
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At best it would have been a marginal improvement, I don't remember any huge jump but it was also some years ago, I think there was a slight increase in performance. The main thing was that when you've got random lines running all over the place there's the potential for moisture to get in or noise to be coupled in, so it reduced the possibility of hard-to-find intermittent problems. In any case it didn't cost anything, and looked a lot neater afterwards.

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