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6 posts

Wannabe Geek


Topic # 143978 3-May-2014 19:28
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Hi all,

My current ADSL2 setup utilizes a BT-male / RJ11 cord (roughly 5m long) to connect the phone jack to my router (DGN-2200 NetGear), then using Cat5E between router and PC.

Today I tested a phone/ADSL splitter that came with my router. It made no difference to line attenuation, and noise margin was basically unchanged. Below are some screenshots from my routers interface. Screenshot 1 and 3 have the line splitter connected, 2 and 4 without. The difference on downstream is the only substantial change.



I want to install a better phone jack/master splitter etc to cut out unnecessary signals. The wiring seemed old - brown, white, black, with yellow disconnected. A blue and white wire connecting a test termination unit (I have no idea what that does). Does anyone have some idea of how to improve the setup. I'm hoping I can upgrade the connection without altering the setup from outside of the building.

Any feedback is appreciated.

Cheers,

Old phone Jack

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1948 posts

Uber Geek
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  Reply # 1036172 3-May-2014 19:31
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If you think you are handy enough there is a trademe $80 self install master filter kit... otherwise if you are close enough to the exchange vdsl and that includes a master filter.



6 posts

Wannabe Geek


  Reply # 1036184 3-May-2014 20:08
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Hi, thanks for the suggestion. I have found a master splitter on pbtech.co.nz for $23 odd dollars, so I would need to figure out how to install it. The brown, black, yellow and white wires, are they some old colour code? The yellow is already disconnected, what do the others do? I forgot to mention, I don't have a phone connected, so just naked, and I'm moving out in 3 months.

Cheers

412 posts

Ultimate Geek
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  Reply # 1036193 3-May-2014 20:30
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malincter: Hi, thanks for the suggestion. I have found a master splitter on pbtech.co.nz for $23 odd dollars, so I would need to figure out how to install it. The brown, black, yellow and white wires, are they some old colour code? The yellow is already disconnected, what do the others do? I forgot to mention, I don't have a phone connected, so just naked, and I'm moving out in 3 months.

Cheers


well in that case you don't actually need the filter at all




 The views expressed by me are not necessarily those of my employer


808 posts

Ultimate Geek
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  Reply # 1036194 3-May-2014 20:30
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malincter:

<snip>
I want to install a better phone jack/master splitter etc to cut out unnecessary signals. The wiring seemed old - brown, white, black, with yellow disconnected. A blue and white wire connecting a test termination unit (I have no idea what that does). Does anyone have some idea of how to improve the setup. I'm hoping I can upgrade the connection without altering the setup from outside of the building.

Any feedback is appreciated.

Cheers,

Old phone Jack


2 questions to help with my sugestions - 1 is this the only jackpoint in the house or are there others and 2 (related to one ) what letter or number is embosed on the front, right hand, near the bottom.

why  because that jackpoint looks like a 2 wire jack and there are more wires connected (3 instead of 2 from the black cable) - the line terminator can be removed with harming your adsl service but removeing it generaly wount improve it either.  It is there to emulate an older style master jackpoint for the line test units to identify that the line is infact terminated and not disconnected.

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Uber Geek
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  Reply # 1036197 3-May-2014 20:33
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Do you have just the one phone jack?

I presume it's a 2 wire jack - is there a "2" on the front of it? If it is, you are probably running on the brown/white pair (given yellow is disconnected) so try disconnecting the black wire - it may give a slightly better connection, but you're doing pretty well already.

If you have only 1 jack, on a naked connection (and you're moving out before ever wanting POTS again), I wouldn't bother paying for a master filter.



6 posts

Wannabe Geek


  Reply # 1036200 3-May-2014 20:51
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It has a 2 on the outside of the faceplate. It is the only one in the unit. I thought that interference was coming through the line, regardless of whether a phone is connected. Is this not true? I am kind of enjoying the process, and would like to see if a master filter would make it better. If the filter that came with the modem could almost halve my speed, then surely a good filter could improve it somewhat. Just a guess.

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Ultimate Geek
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  Reply # 1036202 3-May-2014 21:06
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malincter: It has a 2 on the outside of the faceplate. It is the only one in the unit. I thought that interference was coming through the line, regardless of whether a phone is connected. Is this not true? I am kind of enjoying the process, and would like to see if a master filter would make it better. If the filter that came with the modem could almost halve my speed, then surely a good filter could improve it somewhat. Just a guess.


point here is that you are running a naked connection.....

a filter/splitter is designed to filter out the pots section of the line (that you are not using)
looks to me like the budget filter is blocking more than it should / needs to 






 The views expressed by me are not necessarily those of my employer


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Uber Geek
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  Reply # 1036203 3-May-2014 21:07
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A master filter does two things

1) A low pass filter for the POTS circuit so xDSL noise doesn't get heard on the phone

2) Isolates any extra internal wiring to provide a transmission line for xDSL frequencies through to the modem.

In your case (1) doesn't matter because you have no phone, and (2) also doesn't matter as there appears to be only the one jack and no extra wiring.

You could do it just to learn the process (good on you!), but don't expect an improvement in performance.

That plugin filter you are using is probably just faulty.

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Ultimate Geek
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  Reply # 1036206 3-May-2014 21:13
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malincter: It has a 2 on the outside of the faceplate. It is the only one in the unit. I thought that interference was coming through the line, regardless of whether a phone is connected. Is this not true? I am kind of enjoying the process, and would like to see if a master filter would make it better. If the filter that came with the modem could almost halve my speed, then surely a good filter could improve it somewhat. Just a guess.


OK since it is a two wire jackpoint then there are more wires connected than there should be - the sugestion is the remove the black wire.

A master filter filters ADSL off/away from the POTS line and the rest of the jackpoints in a house  - if there is only one jackpoint (and you have a naked BB service) then there is no need to filter at all. You could just plug the modem/router directly into the jackpoint with a standard line cord

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