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Author Topic: Wrong upstream sync  (Read 2627 times)

supercooper

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Wrong upstream sync
« on: December 04, 2008, 10:10:26 AM »

Hi Guys :)

Not posted for a while but i came accross another weird fault that BT cant seem to put their finger on.

Ok this is one of our customers who uses the connection soley for VOIP (IPDC) They have been using this for 12 months with no problems, now their call quality has gone to pot, the Router is showing the upstream incorrectly and stacking errors.  Filter replaced and the line is as clear as a bell.

Yesterday a BT SFI Engineer attended site and tested the line as spot on, he told me that no errors were passing at all.  So i requested he look into the exchange which im still waiting an update on.

For a few days i have noticed the upstream sync is either 736k or 832k (It should be 832. The connection has started to dropout when high amounts of data are passing i would also assume something exchange side if the line is in tact.

Stats: (This Morning)
Sync Upsream: 832000
Sync Downstream: 3392000
SNR: 15.0Db
Loop Att: 47.5

Corrected blocks: 15583
Un corrected blocks: 1226
Uptime: 2 Hours.

RAD Log:
Date/Time Login  CLI  Dial Number  Result  Error Message 
2008-12-04 08:06:39  <>  <>  Login OK   
2008-12-03 12:04:33  <>  <>  Login OK   
2008-12-03 11:10:53  <>  <>  Login OK   
2008-12-03 08:54:49  <>  <>  Login OK   
2008-12-02 19:25:59  <>  <>  Login OK   
2008-12-02 16:04:59  <>  <>  Login OK   
2008-12-02 12:43:09  <>  <>  Login OK   
2008-12-02 09:48:57  <>  <>  Login OK   
2008-12-01 15:47:26  <>  <>  Login OK   
2008-12-01 14:24:32  <>  <>  Login OK 

The only thing i have not done here is replace the Router. Never seen the upsteam do that before thats one of the reasons i have posted this one, curious to see what can cause this.

Chris
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supercooper

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Re: Wrong upstream sync
« Reply #1 on: December 04, 2008, 10:31:49 AM »

Fogot to mention our ISP's comments.

Assigned to Awaiting External Response. Reason: Hi Thank you for the update, We have passed this back to BT for further investigation into the intermittent connection issue the customer is experiencing. Woosh testing has been performed on the line which shows errors on the line on the up and down stream. We will let you know as soon as we have received an update. Thank you

They just went to site after this update

Chris :)
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Ezzer

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Re: Wrong upstream sync
« Reply #2 on: December 04, 2008, 12:18:38 PM »

Did you find out what the engineers upstream tested at ?
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supercooper

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Re: Wrong upstream sync
« Reply #3 on: December 04, 2008, 01:41:44 PM »

Hi Ezzer,

when he arrived it had synced up at the correct speed, it seems to bounce between for some reason.  He seemed to be dedicated and spent quite some time tesing this for me so i believe him that the line is ok.  I am lead more towards the exchange and now BT have agreed to lift and shift if required.  When the upsteam is at 736k the errors stack up for fun, i cant say what type of errors as the router does not specify this.

I'm watching the connection now to see what happens before the lift n shift is requested.

Can the exchange present these errors on the line that the Router is picking up and also change the sync rates on the upstream?

Chris
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Ezzer

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Re: Wrong upstream sync
« Reply #4 on: December 04, 2008, 02:51:46 PM »

It's possible the card at the exchange could cause this, but unfortunately so could many other things, at least a lift and shift whould prove if it is or isn't the dslam, if it isn't then it's more likely either the eu equipment or toward your end
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supercooper

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Re: Wrong upstream sync
« Reply #5 on: December 04, 2008, 03:04:37 PM »

Thanks Ezzer,

I will watch it for a day or so and then replace the Router, if it still happens i will ask BT for the lift n shift.

Let you know when its all done :)

Thanks again for your help.

Chris
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