Hi Guys,
I have an ADSL line which has been showing a significant spike in FEC and ES over night - commencing at 9pm precisely and ceasing at 5am.
SNR does not show any real variance between those times, generally moves between 6 and 7 dB. Line is otherwise stable and doesn't re-synch.
I'm thinking there is an electrical noise issue caused by something on a time switch but there are no appliances in use on a timer. I would also have thought that SNRM would have been impacted as well in this case?
The stats are on MDWS under cefacat1 if anyone would care to have a look...the 4 day view of FEC in particular shows the pattern quite well. Please ignore the 24th as a power failure ruined the run. Murphy's law in action!
I'd be grateful for any insight.
It's an ADSL1 connection on a long line but has been very stable for a number of years. This behaviour has only recently started over the last week or so.
Thanks,
Mike