My Sky router shows this:- Broadband Link Downstream Upstr

My Sky router shows this:-


Broadband Link Downstream Upstream
Connection Speed (Kbps) 30721 2626
Line Attenuation (dB) DS1:19.8 DS2:56.7 DS3:86.3 US0:10.2 US1:46.5 US2:60.9
Noise Margin (dB) DS1:11.7 DS2:11.7 DS3:0.0 US0:6.2 US1:6.2 US2:0.0

Yet when I do a Speedtest I get-


PING ms 12
DOWNLOAD Mbps 26.26
UPLOAD Mbps 2.33

The difference is due to protocol overheads

In short a difference of between 5% and 10% from the connection speed to the throughput put is to be expected.