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Author Topic: Occasional resync "storms", what might cause them?  (Read 4118 times)

Weaver

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Re: Occasional resync "storms", what might cause them?
« Reply #15 on: February 09, 2022, 09:19:36 AM »

And is the B leg the one at +x DC V connected to the exchange battery? Or whatever the equivalent is in FTTC ?
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4candles

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Re: Occasional resync "storms", what might cause them?
« Reply #16 on: February 09, 2022, 10:06:00 AM »

Yes, 'B' leg battery, 'A' leg earth, on any exchange line, whether it's purely voice, or has ADSL or FTTC superimposed as RF..

With FTTC, the RF from the MSAN is applied on the 'D' side copper pair to the customer, while the 'E' side to the exchange still carries the voice copper pair.



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To err is human - to purr feline
Zen FTTC 40/10 + Digital Voice   FRITZ!Box 7530

HPsauce

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Re: Occasional resync "storms", what might cause them?
« Reply #17 on: February 09, 2022, 01:17:14 PM »

PlusNet tell me that the BT (Openreach?) engineer "should" have the same information (at least) available, but I've printed it all off anyway to show them.
Hmmmmmmm..... no opportunity to do so.
The appointment slot has been and gone. No phone call, no text message.....and no interruptions to service since 7am yesterday.

If I go online my BT account just says, against todays date "Engineer Visit Complete".  ???
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g3uiss

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Re: Occasional resync "storms", what might cause them?
« Reply #18 on: February 09, 2022, 03:35:45 PM »

It could have been repaired externaly and the provider will update you. From your comment they have and it’s fixed. Battery faults in my experience never involve a engineer at the premises.
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burakkucat

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Re: Occasional resync "storms", what might cause them?
« Reply #19 on: February 09, 2022, 04:01:45 PM »

And is the B leg the one at +x DC V connected to the exchange battery?

Change the sign, as it is an +ve earth system. So . . .

-52 V > B-wire > -48 V
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HPsauce

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Re: Occasional resync "storms", what might cause them?
« Reply #20 on: February 09, 2022, 04:33:43 PM »

Battery faults in my experience never involve a engineer at the premises.
Thanks.  :graduate:
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Weaver

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Re: Occasional resync "storms", what might cause them?
« Reply #21 on: February 09, 2022, 07:56:58 PM »

@Burakkucat - Ah, didn’t know that.
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4candles

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Re: Occasional resync "storms", what might cause them?
« Reply #22 on: February 09, 2022, 11:04:51 PM »

Change the sign, as it is an +ve earth system. So . . .

-52 V > B-wire > -48 V


Oops - I really should know better shouldn't I?   :-[

Thanks for the correction.   :)
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HPsauce

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Re: Occasional resync "storms", what might cause them?
« Reply #23 on: February 21, 2022, 11:18:37 AM »

It could have been repaired externaly and the provider will update you. From your comment they have and it’s fixed. Battery faults in my experience never involve a engineer at the premises.
I never really did get any updates but the line has stayed sync'ed now for just over 13 days.  :fingers:
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HPsauce

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Re: Occasional resync "storms", what might cause them?
« Reply #24 on: February 26, 2022, 11:23:45 AM »

Just hopefully to close this off and thank everyone for their input.
I've been monitoring the line and since whatever was done (and no-one in BT or PN has told me) it's stayed sync'ed for 18 days straight, through some pretty rough weather.
And that includes the gas people working in trenches extremely adjacent to the BT underground cable to my "pole over the road", though they've been AWOL for the last week leaving open trenches and the road partially blocked.  :no:
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HPsauce

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Re: Occasional resync "storms", what might cause them?
« Reply #25 on: March 08, 2022, 03:39:58 PM »

Hmmmmm.  :(
Yesterday about (but not exactly at) 6pm I had another "resync storm" that went on for about 15 minutes. Then it was stable until I went to bed.
Checking my router today the last resync was actually around midnight.
I'll keep watching more closely now, I thought things were OK after whatever BT did..... 
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HPsauce

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Re: Occasional resync "storms", what might cause them?
« Reply #26 on: March 13, 2022, 06:33:14 PM »

And another one on Friday (11th) and today (13th) at around the same time. Stayed up in between.
Reported to my Broadband supplier (PlusNet) who are "intrigued" and saw some other "events" at less obvious hours.
They've asked BT/Openreach to do "something", I presume apply interleaving or some other noise management settings that will generally slow my line down.   :-X

I note comments in another thread about interruptions occurring repeatedly at the same time of day that were never identified and resolved.  >:D
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