Hey, If your PON light has been flashing it is losing sync with the exchange, now there are a few possible culprits for this, but what i would suggest although now working fine, is to follow through with the engineer visit, incase there is an underlying fault on the line to which case the engineer will be able to get a log of any dropping PPP sessions and check the light readings on your fibre cable are correct.
Don't leave it until it goes off again.
Hey Ukpcum1, What id suggest it to follow through with the engineer visit, and check the cable with the green sleeve to see if is loose or damaged within the home, Also check your external fibre cabling to see if the cover is still intact and is not open to the elements.
If the PON light is flashing, You are losing your SYNC with the exchange and if the light levels are low at your premise then this will be an on-going problem.
Get an engineer out to check the splice and your light levels incase this is an underlying fault.
with your service being (FTTP) its an On or Off service, there shouldn't be any drops now it could be caused by alot of things such over filling the capacity within the exchange or planned works on the line but id definately get that checked by an engineer.
Sorry but what does Legacy Fibre and not CBT Fibre mean?
When the engineer fixed the break, he had to pullout the broken Fibre and re-blow back to my property, infact he had to do it for all the neighbours that were coming from that manifold as it was all a mess, unfortunately I was the un-lucky one that it impacted the most.