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Author Topic: Strange behaviour during the night  (Read 5055 times)

roseway

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Strange behaviour during the night
« on: October 09, 2017, 09:03:37 AM »

At about 00:26 this morning my connection went down for nearly half an hour. When it returned it connected at 79999/20000 (previously 76221/19999) with the same DS SNRM of 3.3 dB, but a considerably increased US SNRM. Very quickly the DS SNRM dropped to 2 dB and the US SNRM dropped a little, but still a lot higher that it was before.

These are typical symptoms of a power cut, but there was no power cut. I guess there was some overnight work being done in the cabinet.
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  Eric

tbailey2

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Re: Strange behaviour during the night
« Reply #1 on: October 09, 2017, 10:27:29 AM »

Also your  U/S Power has risen from ~1.8dB to 4.7dB and Attenuation increased by 0.3dB.... And you have a load of FECs you never had before presumably due to the lower SNRM but little change in CRCs
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Tony
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burakkucat

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Re: Strange behaviour during the night
« Reply #2 on: October 09, 2017, 05:04:03 PM »

It certainly bears all the hallmarks of the DSLAM being "taken down" . . . either by local action at the cabinet or remotely by entities at the NOC.
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hagrid

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Re: Strange behaviour during the night
« Reply #3 on: October 09, 2017, 10:23:22 PM »

Just a thought is there any change in the firmware version being reported by the DSLAM
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roseway

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Re: Strange behaviour during the night
« Reply #4 on: October 09, 2017, 10:36:15 PM »

Good suggestion, you're quite right:

Yesterday: DSLAM/MSAN type:           BDCM:0xa48c / v0xa48c
Today: DSLAM/MSAN type:           BDCM:0xb12d / v0xb12d
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  Eric

banger

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Re: Strange behaviour during the night
« Reply #5 on: October 09, 2017, 11:46:22 PM »

My BDCM firmware is still the same as your original, I wonder if the change in modem has triggered a DSLAM firmware upgrade or coincidence?
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Tim
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burakkucat

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Re: Strange behaviour during the night
« Reply #6 on: October 09, 2017, 11:53:34 PM »

. . . I wonder if the change in modem has triggered a DSLAM firmware upgrade . . .

I seriously doubt it.

Quote
. . . or coincidence?

That would be more like it.

Perhaps all members, those connected via Huawei equipped cabinets, should keep a close watch for any such updates on their own circuits.
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gt94sss2

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Re: Strange behaviour during the night
« Reply #7 on: October 10, 2017, 12:56:34 AM »

Thanks for highlighting this. Our line went down at just before midnight on 1 October for a similar period of time - and after trying adsl info --vendor on the 8924 just now shows I am also on 0xb12d *

A few days after that I started benefiting from the xdB changes

(*I have set DSLStats to monitor DSLAM firmware version but can't see it in the telnet data its showing this!)
« Last Edit: October 10, 2017, 01:00:39 AM by gt94sss2 »
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j0hn

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Re: Strange behaviour during the night
« Reply #8 on: October 10, 2017, 05:03:45 AM »

*I have set DSLStats to monitor DSLAM firmware version but can't see it in the telnet data its showing this!
Under the Stats tab, at the top. It shows as not monitored if unchecked.

I'm sure the XdB changes starting right after the DSLAM firmware changing was a big coincidence. I'm still on BDCM:0xa48c at the moment.
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gt94sss2

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Re: Strange behaviour during the night
« Reply #9 on: October 10, 2017, 04:38:30 PM »

Under the Stats tab, at the top. It shows as not monitored if unchecked.
???

It's checked, I just can't see it in the telnet data  ???
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roseway

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Re: Strange behaviour during the night
« Reply #10 on: October 10, 2017, 04:44:46 PM »

It's not shown under the telnet data tab. I didn't think it was worth adding another tab there just to show the same information as is recorded on the Stats tab.
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  Eric

konrado5

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Re: Strange behaviour during the night
« Reply #11 on: October 10, 2017, 05:25:26 PM »

???

It's checked, I just can't see it in the telnet data  ???
adsl info --vendor
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konrado5

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Re: Strange behaviour during the night
« Reply #12 on: October 10, 2017, 05:27:12 PM »

I impatiently wait for firmware update. For a few years I have BDCM:0xa48d.
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gt94sss2

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Re: Strange behaviour during the night
« Reply #13 on: October 10, 2017, 06:01:08 PM »

It's not shown under the telnet data tab. I didn't think it was worth adding another tab there just to show the same information as is recorded on the Stats tab.

Thanks - I knew it was there somewhere as I had seen it before.. just not the other day  :-[
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konrado5

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Re: Strange behaviour during the night
« Reply #14 on: October 10, 2017, 08:13:47 PM »

Similar thread. Somebody has also new DSLAM firmware. DSLAM/MSAN type: BDCM:0xb12d / v0xb12d
https://community.bt.com/t5/BT-Infinity-Speed-Connection/down-speed-is-now-half/td-p/1777532
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