The entire build is audited before it goes live for orders.
Light levels measured up to the CBT.
An engineer plugged your fibre in to the CBT, no splicing at that point.
The engineer then spliced your cable on the external of your property.
It's not a cheap splicer he used either.
There's probably a copper DP, a CBT and a splitter in that chamber.
My nearest chamber has 2 splitters, a CBT and a copper DP.
There's an engineer in it every 2nd day.
My developments been live in FTTP for a couple months but MJ Quinn were back this week (they installed it on behalf of OpenReach months ago) in all the chambers.
Doesn't mean something's wrong though.
Engineers take light levels at installations because it's good practice.
If the light readings are too low it can cause your ONT to completely or intermittently lose sync with the OLT.
They aren't irrelevant to installs altogether, just irrelevant to low speeds.
What work could they possibly be doing to your FTTP that wouldn't cause you to lose connection on the ONT?
Was he just looking at the fibre to see if it looked right?
The ONT connects to the OLT at over 2.4Gb/s. It isn't variable, it can't connect at a lower speed.
It drops the connection to the OLT or stays connected.
That 2.4Gb/s is shared by all properties on the splitter (upto 32).
Every ONT on the splitter is connected at the same rate, and you all have the exact same data running over each others fibre.
It could theoretically be contention in the local PON.
It can't be a bad splice though.
There's probably a dozen Zen users who've posted issues with their 500 and 900Mb packages.
Why are you so obsessed over the 1 part of the network I've NEVER known to cause speed issues.
They should send an OpenReach engineer first (it's standard).
He/she will check everything's ok.
Then they will send it up the chain to BT Wholesale.
Your Speedtest alone screams contention.
The graph from the TBB test you posted above is extremely typical of contention.
The very knowledgeable MrSaffron (staff here, he recently received an OBE for his work in broadband) already gave you that exact same answer but you are absolutely fixated on something else.
If the light levels are too low then it simply refuses to link up
Getting full speeds from a Nokia ONT here. Whether they fusion or mechanical spliced no idea, as kept out of the way during install due to social distancing.
The shape suggests a throughput issue somewhere and not a light issue with the local fibre.
He sees hundreds of these graphs a week.
I wish you the best with your low throughput issues. I won't be posting any further in this thread it's getting very repetitive.
Edited by j0hn83 (Sun 11-Oct-20 01:29:28)