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Mad Scientist
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  Reply # 756591 6-Feb-2013 15:29
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have you restarted modem, and is your upload the same



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  Reply # 756592 6-Feb-2013 15:32
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Hi,

My actual sync speed have dropped from 21850 to 14800. There has been no change at all to the attenuation.
My speedtest results are actually less than the sync speedSpeedtest

Regards

 
 
 
 


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  Reply # 756598 6-Feb-2013 15:35
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Hi,

Modem is suffering from extreme case of "restartilitis"

Restarted plenty of times.

Regards

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  Reply # 756599 6-Feb-2013 15:35
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MarkSW:
My speedtest results are actually less than the sync speed


Yep, that's perfectly normal. Should be about 80-85% under ideal conditions.

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  Reply # 756601 6-Feb-2013 15:45
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Without seeing a bitloading graph it's hard to give accurate information, but with attenuation like that and a sudden sync rate drop it would suggest that your line is better suited to interleaving being on, even with 8ms rather than 16ms. Interleaving exists to serve a purpose, and not everybody is going to be able to have interleaving off as crosstalk is a major issue in the copper world.






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  Reply # 756603 6-Feb-2013 15:56
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Hi,

Is it not unusual that crosstalk would suddenly occur after the line being stable for 5 years and consistently maintaining the same line attenuation?

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  Reply # 756606 6-Feb-2013 16:01
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MarkSW: Hi,

Is it not unusual that crosstalk would suddenly occur after the line being stable for 5 years and consistently maintaining the same line attenuation?

Regards


No. But it also depends what your interleaving settings were before - 0, 8 or 16ms. From your results it's clear that interleaving off probably isn't ideal for your line.

It certainly does seem that Telecom plan changes are causing profiles to be reset.



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  Reply # 756615 6-Feb-2013 16:14
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Hi Sbiddle,

Interleaving has always been off on my connection (5yrs) with no issues until now, so I am finding it hard to reconcile the issue to interleaving.

I will take all suggestions on board.

Regards

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  Reply # 756625 6-Feb-2013 16:50
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MarkSW: Hi Sbiddle,

Interleaving has always been off on my connection (5yrs) with no issues until now, so I am finding it hard to reconcile the issue to interleaving.

I will take all suggestions on board.

Regards


The issue is definately between your modem and the ISAM - it's not a Telecom issue. The fact it happened at the same time as a plan change would indicate that it's an ISAM profile change that caused it.

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  Reply # 756627 6-Feb-2013 16:52
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i want to have sync speed of 21850kbps! wow

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  Reply # 756764 7-Feb-2013 00:31
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sbiddle: It certainly does seem that Telecom plan changes are causing profiles to be reset.
Remember there is also FIPD to BBA migration. In the case of FIPD to EUBA from a Basic copper profile to Enhanced copper profile. 

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  Reply # 756765 7-Feb-2013 00:41
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joker97: i want to have sync speed of 21850kbps! wow


I used to sync for some time at 21mb sincne the cabinet was upgraded but after the last fault was fixed its now o more than 17 however it just seems to perform much better than it was at 21. Dont think i have a master splitter. My attenuation is 3db down and 2db up.




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  Reply # 756920 7-Feb-2013 13:31
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Hi guys,

Bit the bullet and signed with Snap on VDSL plan.

Lets see how this goes - will report back.

Regards

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  Reply # 756941 7-Feb-2013 14:03
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MarkSW
My concern is that been on a 500Gig plan, I am now in a high usage pool like the good old Big Time plan, or somehow my speed is being artificially throttled.


I see others have pointed out some possible issues, and you've decided to sign up for VDSL - that's fine, but for the sake of accuracy and anyone else reading this.

Customers on the 500G plan are treated no differently than Telecom retail customers on other plans. There is no 'artificial throttling' of any Telecom Retail customers (Unless they have gone overcap AND have elected to be slowed to pseudo-dialup speed)

Cheers - N


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  Reply # 756977 7-Feb-2013 14:48
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MarkSW: Hi guys,

Bit the bullet and signed with Snap on VDSL plan.

Lets see how this goes - will report back.

Regards


16dB attenuation is too high for VDSL2.

You may be able to sneak under if your wiring is causing a spike in attenuation and a master filter brings it down, but at the end of the day a master filter or rewiring for a single jackpoint is mandatory for VDSL anyway.



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