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Topic # 150442 23-Jul-2014 09:19
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I had my Telecom VDSL2+ account terminated recently but it seems that the line is still live. I never actually used the phone line provided - Chorus ran the VDSL on the second pair of wires going into the house. While that worked okay, there was a constant hum on my main (TCL now Vodafone) phone line) which I attributed to some sort of cross-talk/interference.

Anyway my Telecom account is now cancelled but the noise persists. So out of interest I plugged a phone into the Telecom line and I can hear an interrupted dialtone which suggests I am still live to the cabinet but the account is off. I really would like the line to be disconnected at the demarc but I suspect that is a Chorus job. 

I guess I could do it myself. What do folks think?




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  Reply # 1094176 23-Jul-2014 13:02
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why would you want it disconnected at the demarc?

even though the service is disconnected the line remains "intact", hence the NU tone at the address

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  Reply # 1094214 23-Jul-2014 14:18
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<snip>While that worked okay, there was a constant hum on my main (TCL now Vodafone) phone line) which I attributed to some sort of cross-talk/interference.

Anyway my Telecom account is now cancelled but the noise persists. <snip>


If the noise persists then it will nothing to do with the VDSL signal, as it will be no longer running and unlikely to be caused by the NU tone on the circuit. Disconnecting what remains of the circuit inside your house will likely have no effect.

Report the noise problem to Vodafone so it can be investigated  

 
 
 
 


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  Reply # 1094275 23-Jul-2014 15:30
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If you're getting a humming noise on your line, it means your line is earthing somewhere. 
Crosstalk would typically be associated as a crackling noise and if it is the A-B leg, then you'd hear the Nu tone. You can have your ISP test if there is crosstalk (battery) on the line. 

Physically disconnecting your other line, isn't going to fix it. 




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  Reply # 1094536 23-Jul-2014 21:41
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I might not have been clear enough in my original post.

Prior to putting in ADSL ( and then VDSL) I had no hum on my Vodafone phone line.

Chorus (admittedly at my suggestion), connected the inbound (original Telecom) wiring to the second twisted pair going into the house. Since I used to have two lines in the house, by connecting the Telecom line to the second pair, I could extract the DSL from one of the (now unused) phone jacks and also not have to worry about master splitters etc. since I was never going to use the Telecom phone line.

That is when the hum developed but nothing Telecom did could remove it. I just lived with it.

Now that the Telecom DSL is disconnected (at the cabinet?) I still hear the interrupted dialtone on the line which suggests that the line is still live somewhere.  I could go into the demarc and just disconnect the Telecom cabling to see if it fixes the problem or as some folks have suggested, ask Vodafone. They might say it's not their issue since they didn't connect the line to the second pair.

Hence my question.




System One: Popcorn Hour A200,  PS3 SuperSlim, NPVR and Plex Server running on Gigabyte Brix (Windows 10 Pro), Sony BDP-S390 BD player, Pioneer AVR, Raspberry Pi running Kodi and Plex, Panasonic 60" 3D plasma, Google Chromecast

System Two: Popcorn Hour A200 ,  Oppo BDP-80 BluRay Player with hardware mode to be region free, Vivitek HD1080P 1080P DLP projector with 100" screen. Harman Kardon HK AVR 254 7.1 receiver, Samsung 4K player, Google Chromecast

 


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  Reply # 1094541 23-Jul-2014 21:45
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Is having 2 telcos over one cable even legit to do?




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  Reply # 1094554 23-Jul-2014 22:08
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richms: Is having 2 telcos over one cable even legit to do?


Yep, lots of people have 2 different telcos on the one cable for lots of different reasons, My place does it with 2x ADSL, @TimA was running both a Vodafone and a BigPipe VDSL connection down the one cable for a while just using the 2nd Pair.






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  Reply # 1094573 23-Jul-2014 22:40
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lchiu7: I might not have been clear enough in my original post.

Prior to putting in ADSL ( and then VDSL) I had no hum on my Vodafone phone line.

Chorus (admittedly at my suggestion), connected the inbound (original Telecom) wiring to the second twisted pair going into the house. Since I used to have two lines in the house, by connecting the Telecom line to the second pair, I could extract the DSL from one of the (now unused) phone jacks and also not have to worry about master splitters etc. since I was never going to use the Telecom phone line.



Chorus would do this anyway that is how secound lines are connected normaly


That is when the hum developed but nothing Telecom did could remove it. I just lived with it.



A hum on your Vodafone line would be nothing to do with Telecom so they wouldnt take any action to fix it - did you report the hum to TC/Vodafone



Now that the Telecom DSL is disconnected (at the cabinet?) I still hear the interrupted dialtone on the line which suggests that the line is still live somewhere.  I could go into the demarc and just disconnect the Telecom cabling to see if it fixes the problem or as some folks have suggested, ask Vodafone. They might say it's not their issue since they didn't connect the line to the second pair.

Hence my question.


Your DSL connection is not disconected it is only turned off on the xDSL equipment and it is normaly to hear NU tone on a intact line - that is what is normaly on an intact x-telecom phone line. Disconnecting the circuit @ the demarc will likely have no effect on your other line.





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  Reply # 1094575 23-Jul-2014 22:43
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richms: Is having 2 telcos over one cable even legit to do?


Do you mean two providers on the same circuit - then no / Same cable (more than one pair) - yep

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  Reply # 1094578 23-Jul-2014 22:52
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InstallerUFB:
richms: Is having 2 telcos over one cable even legit to do?


Do you mean two providers on the same circuit - then no / Same cable (more than one pair) - yep


I meant the putting chorus on one pair and telstraclear on another pair of the same internal cable, since they will be coming from different gear I would expect a large difference in the "ground" of the 2 telcos so some issues, whereas if they are coming from a single exchange then they would be at the same potential.




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  Reply # 1094604 24-Jul-2014 00:04
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InstallerUFB: Your DSL connection is not disconected it is only turned off on the xDSL equipment and it is normaly to hear NU tone on a intact line - that is what is normaly on an intact x-telecom phone line. Disconnecting the circuit @ the demarc will likely have no effect on your other line.


Ichui7 didn't have any hum on his internal wiring until the 2nd external pair was connected. How often do spare cable pairs used for 2nd lines end up being the best choice of rejects?

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  Reply # 1094627 24-Jul-2014 06:55
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richms:
InstallerUFB:
richms: Is having 2 telcos over one cable even legit to do?


Do you mean two providers on the same circuit - then no / Same cable (more than one pair) - yep


I meant the putting chorus on one pair and telstraclear on another pair of the same internal cable, since they will be coming from different gear I would expect a large difference in the "ground" of the 2 telcos so some issues, whereas if they are coming from a single exchange then they would be at the same potential.



Only if the TC/VF service was via 'TC Cable' and not both down the Chorus copper network (not coming from the same 'telco earth' in the exchange)  - even then you would have to have physical contact within the circuits for any major service effecting issuses to ariise - which is the same if they were coming down the same cable.

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  Reply # 1094634 24-Jul-2014 07:17
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Bung:
InstallerUFB: Your DSL connection is not disconected it is only turned off on the xDSL equipment and it is normaly to hear NU tone on a intact line - that is what is normaly on an intact x-telecom phone line. Disconnecting the circuit @ the demarc will likely have no effect on your other line.


Ichui7 didn't have any hum on his internal wiring until the 2nd external pair was connected. How often do spare cable pairs used for 2nd lines end up being the best choice of rejects?


2nd pair is only used within the home from the external demark. The Vodafone line comes in on a completely different cable to Chorus.

While I guess it's technically possible, as pointed out the odds of this being the cause are pretty slim. Any such issues would have to be caused by poor internal wiring within the home.







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  Reply # 1095062 24-Jul-2014 16:52
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sbiddle:
Bung:
InstallerUFB: Your DSL connection is not disconected it is only turned off on the xDSL equipment and it is normaly to hear NU tone on a intact line - that is what is normaly on an intact x-telecom phone line. Disconnecting the circuit @ the demarc will likely have no effect on your other line.


Ichui7 didn't have any hum on his internal wiring until the 2nd external pair was connected. How often do spare cable pairs used for 2nd lines end up being the best choice of rejects?


2nd pair is only used within the home from the external demark. The Vodafone line comes in on a completely different cable to Chorus.

While I guess it's technically possible, as pointed out the odds of this being the cause are pretty slim. Any such issues would have to be caused by poor internal wiring within the home.






I guess I wasn't clear enough.

The house is wired internally with two pairs (which is normal).

When I moved in I signed up for Vodafone phone service so they wired a connection from the pole to my house. They also installed a coax for TV and Internet,

Some years later I had a second line installed for my daughter.  When she left home I had it disconnected,

When I signed up for Telecom DSL service, the Chorus tech found existing Telecom cabling going to the Telecom demarc (which was unused but there because I presume the previous owner had Telecom phone service). He then connected his pair to the now disconnected second pair in the house. It was then when I began to get hum on the Vodafone line which has not gone away with the disconnection of my Telecom DSL service.

So when I had Telecom DSL service (and phone service), there would have been two different sets of wiring coming from the pole going to the house. One would be Telecoms, the other Vodafone.  The Telecom wiring would be under the ground since it would have been installed when the house was built. The Vodafone cabling goes above the ground in a conduit (rear section of a subdivided lot) and only under the ground when it reaches my house.

Then each would be connected to one of the two pairs that go into the house. So I suspect if I locate the Telecom demarc and disconnect the cable to my house the hum would go away. I might just do that.




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System Two: Popcorn Hour A200 ,  Oppo BDP-80 BluRay Player with hardware mode to be region free, Vivitek HD1080P 1080P DLP projector with 100" screen. Harman Kardon HK AVR 254 7.1 receiver, Samsung 4K player, Google Chromecast

 


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