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Standard User wingco1
(legend) Thu 30-Jan-14 12:28:12
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Lost Tones


[link to this post]
 
Have a Billion DXL modem/router. Been working fine until recently. The dmt tool shows loss of tones from 469 through to 497 basically all the top end frequencies. I'm with Sky on max unlimited (LLU) for internet and BT for phone. The orange ring wire has been removed from the NTE box and all extensions.

This has just started happening since FTTC work began in the exchange. I've noticed that when doing a tracert the Sky gear has changed in the phone exchange. different router hop name.

Would be glad of some thoughts on the matter.
Administrator MrSaffron
(staff) Thu 30-Jan-14 17:23:02
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Re: Lost Tones


[re: wingco1] [link to this post]
 
A picture would help a lot when talking bin plots smile

VDSL2 has its speed and power controlled to try and avoid undue slowdowns for ADSL2+ so it may just be that in your case you are seeing a wee bit more cross talk.

Andrew Ferguson, andrew@thinkbroadband.com
www.thinkbroadband.com - formerly known as ADSLguide.org.uk
The author of the above post is a thinkbroadband staff member. It may not constitute an official statement on behalf of thinkbroadband.
Standard User b4dger
(knowledge is power) Thu 30-Jan-14 17:45:08
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Re: Lost Tones


[re: wingco1] [link to this post]
 
In reply to a post by wingco1:
Would be glad of some thoughts on the matter.
Are you seeing any performance problems because of this?


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Standard User wingco1
(legend) Thu 30-Jan-14 21:59:57
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Re: Lost Tones


[re: MrSaffron] [link to this post]
 
A picture would help a lot when talking bin plots.
I don't have anywhere to put one unfortunately.
Standard User wingco1
(legend) Thu 30-Jan-14 22:01:10
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Re: Lost Tones


[re: b4dger] [link to this post]
 
Just a minor drop in download speed.
Standard User MHC
(sensei) Thu 30-Jan-14 23:22:39
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Re: Lost Tones


[re: wingco1] [link to this post]
 
Tones 469 to 497 are in the band 2.022 to 2.100 MHz which is used for various mobile radios including land and maritime. You are in Cumbria and there are some high power maritime transmitters up there. It could be one of those being picked up or if you are near a harbour the local fleet transmission.


~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

M H C


taurus excreta cerebrum vincit
Standard User Galoka
(learned) Fri 31-Jan-14 00:15:13
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Re: Lost Tones


[re: wingco1] [link to this post]
 
Tinypic is ust one of free image hosting places, useful for this. You don't need an account, juts upload and link.
Standard User wingco1
(legend) Fri 31-Jan-14 10:41:55
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Re: Lost Tones


[re: Galoka] [link to this post]
 
Uploaded and got this link to share. Not sure it works though.

<a href="http://tinypic.com?ref=2589glv" target="_blank"><img src="http://i61.tinypic.com/2589glv.jpg" border="0" alt="Image and video hosting by TinyPic"></a>
Standard User MHC
(sensei) Fri 31-Jan-14 10:59:19
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Re: Lost Tones


[re: wingco1] [link to this post]
 
Try:

http://tinypic.com/view.php?pic=2589glv&s=8


They are almost certainly due to external noise being picked up. You are already down at 1 or 2 bits per tone so any small change in noise will kill those off.

The gaps at 300 to 330 or so are MW radio stations.


~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

M H C


taurus excreta cerebrum vincit

Edited by MHC (Fri 31-Jan-14 11:02:59)

Standard User wingco1
(legend) Fri 31-Jan-14 12:12:51
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Re: Lost Tones


[re: MHC] [link to this post]
 
Thanks for that. Bearing in mind all wires except 2 + 5 are disconnected, would fitting an iPlate filter be beneficial?
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