I wonder if anyone can explain this.
I am at the end of a long old copper run (about 4km).
I use a Billion 7800DXL router as it is the only one that gives any hope of a useable connection.
I am finding that if the router connects via an Ip address in the range 31.50.238.** I get a sub 2Mbts connection but if it picks up an Ip address in the range 86.142.77.** I get about 3.9Mbts. The SNR does not change so it would seem that DLM is not to blame, the line attenuation is steady at 40.5db
I leave the router on all the time and never disconnect. as long as I have what I would term my "normal" download speed. . If for some reason the Ip address changes.(never instigated at my end) and I get a slow Ip I wait 14 days and the disconnect/reconnect and hope to pick up a "good" ip.
This is and has been repeatable over a long time.
Can anyone offer any explanation or advice.