ADSL disconnects when someone rings my phoneline

Question

Dear All,
I used to only use the home hub 2 phones but decided that I wanted a home hub 3 so I bought a new phone.  Plugging this in resulted in my broadband speed dropping (over a number of days) from 2.6-3Mb to 1.6-2Mb.
I tried swapping out the microfilter between the three I have had from BT and another which I bought but this did not stop the problem.
In addition the phone line seemed much quieter (in terms of the volume of the other persons voice) and had more interference than that which I was used to using the home hub 2 phones.
But now.... I've noticed over the past few days that whenever someone call's my home phone my ADSL will disconnect, then reconnect (twice but it will drop the first blue light quickly and then stay connected when it comes on a second time).
I have spent a few hours on the phone to various BT support personnel and have excluded all the internal wiring by wiring the router directly into the test socket.
I have also tried 4 microfilters and two different phones.  In fact this issue persists even if no phone is connected (with either the router directly connected to the test socket or through one of the four microfilters), simply ringing the home number is enough for the internet to slow down and then disconnect.
I have dialled 17070 and used option 2.  There is a buzzing noise, it’s not very load but noticeable.
BT have done a line check and that report’s no problem but I have asked for an engineer to come out as there is clearly an issue.
All internet searches I have conducted suggest that this could be a High Resistance (HR) fault, but I have no idea what this is.
My ADSL line status (now with no phone connected) is:
ADSL line status
Connection information
Line stateConnected
Connection time0 days, 0:17:01
Downstream2,565 Kbps
Upstream276 Kbps
ADSL settings
VPI/VCI0/38
TypePPPoA
ModulationITU-T G.992.5
Latency typeInterleaved
Noise margin (Down/Up)12.9 dB / 15.8 dB
Line attenuation (Down/Up)60.0 dB / 34.7 dB
Output power (Down/Up)17.6 dBm / 11.8 dBm
Loss of Framing (Local)34
Loss of Signal (Local)3
Loss of Power (Local)0
FEC Errors (Down/Up)11 / 0
CRC Errors (Down/Up)2 / N/A
HEC Errors (Down/Up)N/A / 1250383
Anyone have any ideas?

Answer 1

Basically, the steps like this below, we require mainly the line stats and speedtest .
Can you please post your ADSL stats by following this direct link; http://192.168.1.254/ and naviagte to top right to 'A -Z' and find ADSL Settings under 'A' and post information including Line Attenuation, Noise Margin etc.... 
Also we need a speedtest just to have a look and make sure everything's okay? Use this link http://bit.ly/o8qqQ9 as it will also help you diagnose and give you a list of solutions afterwards to help you diagnose your problems if it thinks there is a problem. Could you please also copy and paste the results from the White/Black/Green pop out page including your IP profile, DSL Connection Rate and speed achieved during test.
Run a line test to determine if or not it is an external problem: http://bit.ly/tgwip
Can you also confirm if you're connected at the master socket or an extension? And what your type your master socket is according to this picture
Regards Edd
Check your Line
BT Speedtester