@shkhoo Dear David, thank you for the reply.... I have tried changing Cat6, Cat7 and Cat8 cable .. still connectiing to TP-Link Archer will always give me a speedtest result of 800 - 900 Mbps. But...

@shkhoo this is the DECO BE85 router firmware

@shkhoo This is my fibre terninal unit from Huawei EchoLife Hg240H

@shkhoo i have configured the QOS to 1000 mbps upload/ 1000 mbps download. But after rebooting the router... the speed still show less than 100 mbps.

@shkhoo

@shkhoo this is the itermitent speed that i am receiving on the 1Gbps plan... from 9:00 am to 11:00 am ... I am getting speed above 900mbps... the speed comes down to less than 100 mbps around 12:00...