TalkTalk had given them an all-in-one router, a Huawei, under their name “super router”.
It seems all but super! After a day or so of being in-sync their line would slowly start to have packet loss increasing slowly over the following days. This packet loss would make the internet slow or near unusable until the Super Router was rebooted.
I came in, swapped their “Super router” with a “better router”… the good old Openreach white VDSL modem twinned with a Buffalo router running DDWRT.
Other than a few regional or exchange outages within the TalkTalk network and an evening or two of congestion causing packet loss the “creeping packet loss” all-day issue has disappeared!
Summary: Poor performance on TalkTalk FTTC? Try an Openreach modem and dedicated Ethernet router.. it looks like the router that TalkTalk supply may have DSL chipset or compatibility issues with BT VDSLAMs.