I'm really lost over the nature of the problem..
Is this an accurate account of the history?..
You had FTTC installed on April 2.
At the time, you were not satistfied with the wiring installation in your home, nor with the performance of the FTTC service, in particular the upstream throughput.
Using the test function of several speedtest.net servers, you have measured that upstream performance to be between 4.5Mbps and 7.5Mbps.
Consequently, you requested an 'uplift' from Openreach, which was performed a few days ago.
That work has unfortunately not improved the VDSL2 performance.
You decided to unlock the ECI modem. This has gained you limited statistics on the line performance (error rates, aggregate attenuation rates, SNR, but not QLN nor HLOG).
In this thread and others, you have raised various concerns:
. the competence of the wiring that the openreach engineer carried out in your home,
. the presence of a ring wire in the master socket (NTE?) in your home
. a conflict between a HomeHub2 and the ECI VDSL2 modem in your home network
. the possibility that defective consumer wiring is creating noise which could be impacting your upstream bandwidth.
What originally prompted you to request an uplift? Your disappointment at the performance of the FTTC service which failed to meet your expectations? Were any faults actually discovered, acknowledged or repaired during that uplift?
To recap..
Your downstream rates (both attainable and actual) have remained satisfactory since installation at the beginning of April..
Your upstream attainable rate has remained constant.
your actual upstream rate has dropped from ~7.5Mbps to around 4.5Mbps, according to various speedtest.net tests.
Do you have any info on your loop? How far are you from the cabinet? Did the engineer comment on the quality of your line during his maintenance work?
cheers, a