Hello, sorry for English message but I bet your English is much better than my Dutch.
My problem is with my Thuis-internet (fiber optic). I’m having interruptions time to time. When the problem is happening; LOS light blinks on huawei media converter (red<->off in 1 second interval) while PON is off. I restart modem, power on and off the media converter, that doesn’t help. After a while, usually when I’m waiting for someone on the support line (yes it takes long!) problem disappears, PON is solid green and LOS is off, and I’ve internet.
Cabling at my side is in the meterkast, relatively stable temperature and no moving stuff around. Can you perhaps deploy someone to check what the problem is?
This is a very nasty problem that I’ve to be in meetings almost all day long when I’m working at home.