Unresolved support ticket open for more than six months - RESOLVED: after 8 mths
First, I forgot to comment on those noise drops to zero in reply #185, that is likely to be a router polling issue (there was no change in sync) and if so can be ignored.
Secondly, as this pulsing has now disappeared after the re-sync it could just have been some very strange interaction between the line card and the router at that particular sync rate.
A quick recap. I assume the ticket number is still #25488897, I dug up from earlier in the thread.
Now -
What gave you the impression that the tie-pairs could be modified remotely? The last I knew anything about tie-pairs (admittedly not very recently) they were physical wires at the exchange, so unless something dramatic has changed, perhaps someone who knows (from PN? if not anyone else) could educate us all.
The fact that "someone " on the Faults Logged Team suggested you continue monitoring and you had to challenge this, suggests that there is no-one senior enough at PN that has taken ownership of this problem.
Any competent engineer would know that this line should sync at maximum speed (as does your neighbours) and the bits/tone allocation is totally up the creek.
I'm now looking for some more straws to clutch at, to add to the already full bucket.
I think it would be a good idea at this point to yet again try another known good router, with your dangly filter in the test socket and get DMT/RouterStat plots.
Also check/confirm that the piece of cable not to CW1308 between the box under the eaves and the recently fitted RF3 filter has no other mysterious boxes on route, also from your Master Line box back to the RF3.
There is as far as we know -
No evidence that BT have checked every joint at every DP or in every Cab & Pillar between you and the exchange.
(It is conceivable that an RF2 filter may have been fitted on your cable pair somewhere at some time in the past - due to the proximity to the airport etc.)
No confirmation that they've done the lift and shift.
Edit: Forgot to mention - the SNRM immediately after the last resync was ~20dB. Yeh a target of 20dB
Secondly, as this pulsing has now disappeared after the re-sync it could just have been some very strange interaction between the line card and the router at that particular sync rate.
A quick recap. I assume the ticket number is still #25488897, I dug up from earlier in the thread.
Now -
Quote from: Catweazle
Quote from: Anotherone I trust you've updated your ticket with the latest info. It might be worth asking the question, which tie-pairs did they alter, I assume there were no external ones involved?
Yes, I have updated the support ticket and referred back to this discussion (with a suggestion that the info, graphs etc were passed on to BT), but the advice from PN support (Logged Faults team) was just to continue monitoring the connection i.e. as the line had stayed connected for 24 hours. But, after I challenged this, they've now passed the fault back to the escalation team.
I've had no info on what was changed for the tie-pairs, but my impression was that BT could do this mod remotely, whereas the lift and shift would require an engineer to go to the exchange .............. .................................
What gave you the impression that the tie-pairs could be modified remotely? The last I knew anything about tie-pairs (admittedly not very recently) they were physical wires at the exchange, so unless something dramatic has changed, perhaps someone who knows (from PN? if not anyone else) could educate us all.
The fact that "someone " on the Faults Logged Team suggested you continue monitoring and you had to challenge this, suggests that there is no-one senior enough at PN that has taken ownership of this problem.
Any competent engineer would know that this line should sync at maximum speed (as does your neighbours) and the bits/tone allocation is totally up the creek.
I'm now looking for some more straws to clutch at, to add to the already full bucket.
I think it would be a good idea at this point to yet again try another known good router, with your dangly filter in the test socket and get DMT/RouterStat plots.
Also check/confirm that the piece of cable not to CW1308 between the box under the eaves and the recently fitted RF3 filter has no other mysterious boxes on route, also from your Master Line box back to the RF3.
There is as far as we know -
No evidence that BT have checked every joint at every DP or in every Cab & Pillar between you and the exchange.
(It is conceivable that an RF2 filter may have been fitted on your cable pair somewhere at some time in the past - due to the proximity to the airport etc.)
No confirmation that they've done the lift and shift.
Edit: Forgot to mention - the SNRM immediately after the last resync was ~20dB. Yeh a target of 20dB
Quote from: Anotherone What gave you the impression that the tie-pairs could be modified remotely?
PN support
Just having a sneak peek at work, but will check back later!
It's all done remotely with Prince Charles "grey goo" (those lttle nanobots) 
But for those exchanges that haven't been upgraded, it's still a BT man.
But for those exchanges that haven't been upgraded, it's still a BT man.
Very weird that, but the same pattern as before.
Came on for about 15 minutes with a huge level of interference and a steady pulsing pattern every 6 minutes or so.
Any idea what your target SNRM is now?
Came on for about 15 minutes with a huge level of interference and a steady pulsing pattern every 6 minutes or so.
Any idea what your target SNRM is now?
Downstream SNR immediately after a reconnection 
B.
B.
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