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uk.telecom.broadband (UK broadband) (uk.telecom.broadband) Discussion of broadband services, technology and equipment as provided in the UK. Discussions of specific services based on ADSL, cable modems or other broadband technology are also on-topic. Advertising is not allowed.

ADSL line mode is now T1.413 and attenuation/noise changed

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Old September 13th 04, 05:30 PM posted to uk.telecom.broadband
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Default ADSL line mode is now T1.413 and attenuation/noise changed

I thought the UK standard was G.dmt but for the last 2 days my router ( BT
Voyager 2000) is saying that the connection is T1.413. I can force it back
to G.dmt but if I then do a subsequent re-connection it connects as T1.413

Over the same period, the line attenuation and noise margin figures have
both dropped too: attenuation from 50.5 to 26.5 and noise margin from 23.3
to 13.

To complicate matters more, these lower figures are what I used to get
before I improved the extension wiring in the house by taking a dedicated
feed from the BT master socket for adsl. I made the wiring changes because
the adsl would typically lose sync several times a day; after the changes it
was generally fine. So, despite the much worse attenuation figure (but
better noise margin) I had a more stable connection.

I haven't changed any wiring recently so now I'm confused.

Any ideas what's going on?



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