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Sudden poor speed on Gig1 Fibre

Tuning in

Upgraded to Gig1 fibre and initially speeds were great, getting 900mbps+ typically. A few weeks back, our upload randomly doubled from a consistent 50mbps to 100mbps, and now we're struggling to get over 400mbps down. Currently, we get 300mbps on a good day. 

We're on the Hub 4 in modem mode, linked to an Asus AC86U router. Checked speeds over Ethernet on a PC with a gigabit network card.

Can I share the network status results to see what's going on? 



Check the for a known fault in your street via 0800 561 0061.

Before assuming the Hub is at issue, revert the Hub to Router mode and find out ...
Once the test begins click on: Run full test to see all the stats.

Signal Level Checks

Via connect to the Hub, do not login in, scroll down to "Check router status"

Using the Hub's "Check router status" tabs check the Downstream and Upstream power levels are in spec.

Downstream Power Levels of -7 to +7 dBmV are preferred, +10dBmV is the max acceptable, with a SNR of 33dB or higher across all DOCSIS 3.0 channels. Rising error counts across many channels is a current service noise fault.

Power Levels of 35 to 49 dBmV are preferred, with QAM 64 Modulation mode across four to six DOCSIS 3.0 channels.  Seeing QAM 32/16 is a current service noise fault.