Disconnects on Accessing HH and Random Disconnects...

Question

System is BT HH Ver 2.0 Type B with Firefox v.3.6.13
On a number of occasions I have found random disconnects in the event log and disconnects when I go to access the HH and type in my password, when the BB light goes out and then the yellow comes on and it begins the reconnect sequence.   These are shown in the Log, but it doesn't seem to make any obvious change to the line synch rate.
Event Log - selecting the filter category as "DSL Home" from the pull down menu
Recorded events    
Message
Feb 9 22:55:27 2011    ERR 2011-02-09T22:55:27Z cwmp: mt_cwmp: session error: Could not resolve host
Feb 9 22:53:09 2011    ERR 2011-02-09T22:53:09Z cwmp: mt_cwmp: session error: Could not resolve host
Feb 9 22:25:37 2011    ERR 2011-02-09T22:25:37Z cwmp: mt_cwmp: session error: Could not resolve host
Feb 9 20:02:32 2011    ERR 2011-02-09T20:02:32Z cwmp: mt_cwmp: session error: Could not resolve host
Feb 9 09:26:27 2011    ERR 2011-02-09T09:26:27Z cwmp: mt_cwmp: session error: Could not resolve host
Feb 9 08:26:21 2011    ERR 2011-02-09T08:26:21Z cwmp: mt_cwmp: session error: Could not resolve host
Feb 9 07:56:22 2011    ERR 2011-02-09T07:56:22Z cwmp: mt_cwmp: session error: Could not resolve host
Feb 9 02:56:49 2011    ERR 2011-02-09T02:56:49Z cwmp: mt_cwmp: session error: Could not resolve host
The events at 20:02 and 22:55 were caused by my accessing the HH and typing in my password.   The others were random disconnects - the HH has not been switched off for some days and the computer was only switched on aorund 15:00 hrs.
The line synch rate at 23:12 is
Downstream    10,134 Kbps
Upstream    1,078 Kbps
The changes to the Noise Margin/Attneuation and Power are very minor fractions of a dB from previous checks.  The line is quiet.  Distance to the Crowthorne exchnage is ca 966m.
I have even had disconnects using IE 6.0 on Feb 3.
Does anybody else get these effects?   Is it a faulty HH?   Is it some interference on the line?
This looks similar to the problem under "home hub keeps resetting" from "technobaz" today

Answer 1

Further to the saga of disconnects shown by my HH2 Events Log I have had helpful support from Forum
Moderators.   They arranged for OpenReach technician to call again subsequent to the 25 Feb visit on 9
March.    The Moderators could still see my line problems from their site (where ever that is!).   I have had
the HH2 Type B powered on for over two months (to ensure line stability) and the line Down Rate has
gradually reduced
17 Jan 2011     Downstream    11,347 Kbps      Upstream    828 Kbps
        Noise margin (Down/Up)    14.8 dB / 12.6 dB
        Line attenuation (Down/Up)    27.0 dB / 11.9 dB
9 Mar 2011    Downstream    1,151 Kbps     Upstream    1,078 Kbps
         Noise margin (Down/Up)    27.9 dB / 8.0 dB
        Line attenuation (Down/Up)    26.7 dB / 11.8 dB
the ADSL statistics had varied slightly over the period and the Event Log typically showed disconnects with
the text, e.g.
Feb 2 06:13:45 2011    (112240.430000) danube_dsl_ioctl:73: Failed ioctl 270 errno 22
Feb 1 22:43:17 2011    (85302.200000) RTNL: Received ERROR reply 'No such process' for message
type 0x19
Feb 1 22:42:42 2011    ERR 2011-02-01T22:42:42Z cwmp: mt_cwmp: session error: Could not resolve
host
Feb 1 22:42:42 2011    (85267.560000) danube_dsl_ioctl:73: Failed ioctl 250 errno 22
My line still showed the disconnects.    I also tried my neighbour's HH2 Type A for 24 hrs on 7/8 Mar for
comparison.  He was getting no disconnects on his line.   The Type A Event Log  showed on the 8 Mar my
line disconnects, albeit in a slightly different set of "text language" to the Type B -  so it was not a router
problem!
12:22:13   8 Mar     FIREWALL event (1 of 1): deleted rules
12:22:12   8 Mar     PPP link up (Internet) [86.160.208.247]
12:22:12   8 Mar     PPP CHAP Chap receive success : authentication ok
12:22:12   8 Mar     PPP CHAP Receive challenge (rhost = bras-red6.gi-b)
12:22:09   8 Mar     xDSL linestate up (ITU-T G.992.5; downstream: 2272 kbit/s, upstream: 1040 kbit/s;
output Power Down: 21.0 dBm, Up: 12.4 dBm; line Attenuation Down: 23.5 dB, Up: 12.0 dB; snr Margin
Down: 4.0 dB, Up: 31.3 dB)
12:21:56   8 Mar     PPP link down (Internet) [86.160.221.43]
12:21:44   8 Mar     xDSL linestate down
12:21:19   8 Mar     FIREWALL event (1 of 1): created rules
On the 9 Mar visit, OpenReach made a series of comprehensive tests isolating the house/manhole line,
checking equipment in the exchange and green street interface box/exchange line.   My house line (some
10m) was showing good insulation resistance and similarly the box/exchange line a very high insulation
resistance.   The value surprised me, but a Google check shows a value of 10000 Mohms/km may be 
typical.   
However, somewhere between the green box and my pavement manhole the insulation resistance was low.
I am now awaiting for the bad section to be located and my present twisted pair to exchanged for a good
pair.   I hope after a few days the Line Synch Rate may get back to the original values.
Rodney Fry