How to solve noise build up

Question

Hi – I am having an ongoing problem with the build up of noise on my telephone line. Can anyone help !
My set up is as follows :
Old style wall plate (ie not compatible with i-plate, and so I do  not think there is a test plug to access ?) => filter => Homehub 2
Telephone output from HH => filter =>filter to DECT phone
Yes, there are three filters in this set up (hopefully to rule out faulty filters) and the DECT phone is brand new (Magic Box Katana Trio). The same problem I am experiencing now occurred on the previous phone (BT Freestyle, about 2 years old) and my spare phone before that.
People ring us using our old geographical number (for convenience), but when we ring out the HH will obviously use the Talk line.
PROBLEM
When making outgoing calls (using the “Talk” line”) the line is fine. No issues.
When receiving incoming calls (which will be via the geographical phone number), these will work fine for about a week and then we may pick up the phone and it is quite crackly. If we do nothing, the next time we receive a call it is impossible to hear the caller.
I then Reset the HH – this clears the line typically for about a week, and then the problem reoccurs.
Until I joined BT Internet in October 2009, this was never a problem (I used Orange, with a similar set up ie two phone numbers, outgoing on Orange, incoming on geographical)
Using 3 filters I hope I have rules out a rogue filter, and this problem has occurred on three separate sets of phones.
Is this a line problem or a HH problem, or something else ?
Any ideas what else I can do to try and solve the problem ?
Many thanks for any help you can give.

Answer 1

With the set up as you are unable to test in the test socket all you can do is to unplug all your equipment in the house from all the sockets (HH, phones, sky, double adaptors, extension leads) and try 2 known working phones  one at a time in your main socket without using a filter.
If you still get the problem it is down to BT Openreach to sort the problem out for you.
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