On Monday, all was fine with a full 40 Mbps sync and speeds of 38Mbps - TBB, BT and speedtest.net all giving similar results.
Yesterday (Tuesday), I was doing a download and noticed the speed was a little slow, so followed up with a TBB test and it returned 31Mbps which was confirmed by speedtest.net. Did a few checks and rebooted the modem. Tested again with similar results.
Tried a BT speedtest and found my maximum throughput had dropped from 38717 down to 32xxx. Again went and checked everything, and still returning the slow speeds. BT ran a full set of diagnostics around midnight and reported no issues but could see that my sync and max throughput had dropped.
Nothing obvious here, external wires look OK, no roadworks from here to cabinet ...
Rebooted the modem again this morning and max has increased to 33978
But still scratching my head as to why the drop and why it has not recovered.
M H C
taurus excreta cerebrum vincit