Haven't had a chance to replace the junction with the master socket, but I did find an old 350Mhz Cat 5E cable that's about 10 metres long, so I put the router downstairs instead.
Currently my IP Profile (BRAS profile?) is set at 500k thanks to the disconnects. I've tried leaving it off(out) for over an hour and putting it back in, but it's still not playing ball. Think I'll have to call BT again to reset it (Unless it sorts itself out?)
I have had to use DG834G as a switch as my cable wasn't long enough lol.
Anyway... my current stats:
Connection information
Line stateConnected
Connection time0 days, 0:35:35
Downstream1,216 Kbps (Has been as high as 1,400+)
Upstream448 Kbps
ADSL settings
VPI/VCI0/38TypePPPoA
ModulationITU-T G.992.1
Latency typeInterleaved
Noise margin (Down/Up)11.8 dB / 13.0 dB (Noise margin "Down" was previously 12.2, so it's got worse?)
Line attenuation (Down/Up)63.5 dB / 31.5 dB (I love my insane 63.5, probably higher, just not showing)
Output power (Down/Up)15.9 dBm / 11.9 dBm
Update: Seems my BRAS profile has changed itself to 1000K now, so getting about 850Mbps. Still slower than the 950Mbps I was getting with the 10 metre round RJ11 cable, but hopefully it will get better over time. Annoyingly, I can't attach the BT Home Hub V2 to the wall, which is a bit inconvienent.