How do you know the speed estimate from cab 2? Because based on this table, it's not such a difference
http://www.thinkbroadband.com/guide/fibre-broadband.html
Distance to cabinet (metres) Estimated downstream connection speed Estimated upstream connection speed Cumulative %'age of premises at this distance
100m 100 Mbps 25 Mbps 5%
150m 80 Mbps 20 Mbps 10%
200m 65 Mbps 18 Mbps 20%
300m 45 Mbps 17 Mbps 30%
400m 42 Mbps 16 Mbps 45%
500m 38 Mbps 15 Mbps 60%
600m 35 Mbps 14 Mbps 70%
700m 32 Mbps 11 Mbps 75%
800m 28 Mbps 10 Mbps 80%
900m 25 Mbps 9 Mbps 85%
1000m 24 Mbps 8 Mbps 90%
1250m 17 Mbps 5 Mbps 95%
1500m 15 Mbps 4 Mbps 98%
VDSL2 Profile 17a, cabinet to premises speed estimate
Thank you for posting this info.
My download speed is 24/25Mbps so I am 900/1000 metres from the exchange which I know is correct.
My upload speed is 2/3Mbps and with reference to the table at 900/1000 metres I should expect 8/9Mbps.
My upload speed is in line with the BT estimate when I contracted for Infinity 1, however, can anyone enlighten me why it is so different from the table?