55dB attenuation, and I would expect a lot of gaps at the > 1.1MHz range as the physics means the signal is attenuated more over distance and thus the slightest noise can mean the tone is not used.

But my attenuation is 27dB.

Full stats:
Uptime: 1 day, 12:35:54
DSL Type: G.992.5 annex A
Bandwidth (Up/Down) [kbps/kbps]: 1,001 / 7,486
Data Transferred (Sent/Received) [GB/MB]: 2.32 / 358.33
Output Power (Up/Down) [dBm]: 12.0 / 18.5
Line Attenuation (Up/Down) [dB]: 15.0 / 27.5
SN Margin (Up/Down) [dB]: 16.0 / 16.5
Vendor ID (Local/Remote): TMMB / BDCM
Loss of Framing (Local/Remote): 13 / 0
Loss of Signal (Local/Remote): 4 / 0
Loss of Power (Local/Remote): 0 / 0
Loss of Link (Remote): 0
Error Seconds (Local/Remote): 9 / 0
FEC Errors (Up/Down): 49 / 35,992
CRC Errors (Up/Down): 49 / 39
HEC Errors (Up/Down): 29 / 32

Ok got confused with CurlyWhirly and you.

ADSL2+ is more prone to interference caused by extensions (used or not) in the home, hence why the I-Plate is increasing its presence (cheap version is to remove the ring wire at the master socket).

Hi,
I got looking at my missing tones, and seems a big coincidence that Radio 5, Talk Sport and Absolute Radio are spot
on the frequencies where I get 0 bits per tone.
There are some other holes I haven't yet been able to match to radio stations.
I am 32km Northeast of Brookmans Park transmitter.

I keep a summary of my bitloading log here: http://tinyurl.com/mxstld

Cheers,
Peter

In reply to a post by ukwiz:

I am using DMT to try to find out what is wrong with my BB connection. I have noticed that on connection it shows several missing tones.

What impact does this have?

It'll sound funny if it ever starts to sing

More seriously it reduces your bandwidth by between 1 and 14 bits per tone. It's likely caused by local interference. Try switching everything off and see if the tones come back. Don't resync your modem too often though if on IPStream. Another option might be to detune a radio and see if you can hear anything.

Most likely though there's nothing you can do about. Follow the advice below:

http://www.kitz.co.uk/adsl/socket.htm

..and hope for the best.

In reply to a post by CurlyWhirly:

Do you think this will improve when AM/FM radio is phased out over the next few years?

Possibly. Little else will though and it seems a high price to pay.

I think that Ofcom are backing down on that recommendation. For once they seem to have got a clue and realised how stupid it would be.