In reply to a post by XRaySpeX:

In reply to a post by BatBoy:

It's a line fault. That really is the SNRM and max sync at max power.

Your conclusion is also shown false by other posters here showing other routers reporting higher more normal SNRMs on the same O2 capped line, while the O2 router refuses to report anything but 6.5 dB..

Here an example of mine taken within minutes of each other:

O2 8 Meg LLU
==========
Router:......................D-Link..........O2
Downstream
----------
Speedtest (bps).........7.1M............7.2M
Sync Speed (bps).......8192K.........8187K
Attenuation (dB)........27...............27
SNM (dB)...................13................6.5
Power (dB)................17...............18

Router:......................D-Link............O2
Upstream..
----------
Speed (bps)..............1129K...........1321K
Attenuation (dB).......16.................14
SNM (dB).................. 6.................. 7
Power (dB)...............11.................12

• A diff router on an O2 capped connection reports a much higher NM.
• The O2 router on a diff capped connection reports a much higher NM.

In reply to a post by XRaySpeX:

It has been shown here that is still behaves this way.

You will clutch at straws. It has been proved empirically that the 6.5 NM is unique to an O2 router when used on an O2 capped connection.

• A diff router on an O2 capped connection reports a much higher NM.
• The O2 router on a diff capped connection reports a much higher NM.

In reply to a post by XRaySpeX:

You've been supplied with full stats.