Microfilter question

Last night I was asked by a friend if an extra microfilter on the
phone socket would improve the broadband speed. I checked and there
is a microfilter at the master socket, feeding the router and the lead
running to the extension socket. There is no phone on the master
socket. That means the extension socket has a microfilter, albeit at
the master socket. The question I was asked was: would adding a
second microfilter between the extension socket and the phone be a
good idea?

Scott wrote:
> Last night I was asked by a friend if an extra microfilter on the
> phone socket would improve the broadband speed. I checked and there
> is a microfilter at the master socket, feeding the router and the lead
> running to the extension socket. There is no phone on the master
> socket. That means the extension socket has a microfilter, albeit at
> the master socket. The question I was asked was: would adding a
> second microfilter between the extension socket and the phone be a
> good idea?

No. The filter does nothing to the adsl signal, - it simply stops the
phone interfering with it.

I've tried two filter to reduce ADSL hiss on the phones..but it doesn't
do that either :-(

On Sun, 16 Oct 2011 10:08:39 +0100, Scott wrote:

> Last night I was asked by a friend if an extra microfilter on the phone
> socket would improve the broadband speed. I checked and there is a
> microfilter at the master socket, feeding the router and the lead
> running to the extension socket. There is no phone on the master
> socket. That means the extension socket has a microfilter, albeit at
> the master socket. The question I was asked was: would adding a second
> microfilter between the extension socket and the phone be a good idea?

So the extension socket is already filtered? Remember that the primary
purpose of a microfilter is to prevent the HF adsl signal interfering
with the telephone, and a secondary function is to prevent any spurious
HF noise generated by the telephone interfering with the adsl equipment.
Unless you have some evidence that either of these interferences is
happening, I doubt that adding a second microfilter in series (ok,
technically it would be a series - parallel arrangement) with the first
would have any beneficial effect.

Rgds

Denis McMahon

Denis McMahon wrote:
> On Sun, 16 Oct 2011 10:08:39 +0100, Scott wrote:
>
>> Last night I was asked by a friend if an extra microfilter on the phone
>> socket would improve the broadband speed. I checked and there is a
>> microfilter at the master socket, feeding the router and the lead
>> running to the extension socket. There is no phone on the master
>> socket. That means the extension socket has a microfilter, albeit at
>> the master socket. The question I was asked was: would adding a second
>> microfilter between the extension socket and the phone be a good idea?
>
> So the extension socket is already filtered? Remember that the primary
> purpose of a microfilter is to prevent the HF adsl signal interfering
> with the telephone

No.
The primary purpose is to prevent the telephone shorting out the ADSL
signals.

, and a secondary function is to prevent any spurious
> HF noise generated by the telephone interfering with the adsl equipment.

No. Not really. That's a by product but it actually doesn't do that good
a job..