Broadband filters
Discussion
Does anyone know if I need one of these for the actual broadband modem/router? I know I need one for the phone (which is downstairs) and was wondering if I need another one for the modem as well or can I just plug it straight into the socket as I have a cable with a BT plug on it?
cheers
cheers

NO You definitely do not need one, you can just connect the broadband modem / router using a standard modem cable direct to the phone socket. Put one on the actual broadband router / modem and it most likely won't work.
I believe the filter is exactly that - it filters out the frequencies used by ADSL from whatever its connected to, try plugging a phone in without a filter and you can hear a high pitched noise while the ADSL is connected. Some filters have 2 connections, an unfiltered one marked for data and a filtered one marked for the phone, but the data connection of those sorts of filter doesn't actually do anything.
>> Edited by d-man on Saturday 17th April 20:57
I believe the filter is exactly that - it filters out the frequencies used by ADSL from whatever its connected to, try plugging a phone in without a filter and you can hear a high pitched noise while the ADSL is connected. Some filters have 2 connections, an unfiltered one marked for data and a filtered one marked for the phone, but the data connection of those sorts of filter doesn't actually do anything.
>> Edited by d-man on Saturday 17th April 20:57
You will need a microfilter (looks like a socket doubler) for every phone socket in your house. Otherwise, if you try using the phone when the PC is on, you'll get static varying from irritating to impossible. IIRC DABS do them for £4.00 each - or just do a search for 'ADSL microfilter'.
I would recommend you do use a filter. Although it was mentioned above that the ADSL port on a filter does nothing, I am afraid this is not true.
The ADSL port itself (at least on the good filters) is itself filtered to prevent the telephone equipment interfering with the modem. It prevents harmonics and other electrical interference on the telephone network getting through to the modem.
It is worth spending a little extra on the filters. Some of the cheaper ones do not conform to the BT spec and can cause all sorts of problems.
For more in depth information, look here: www.adslnation.co.uk/support/filters.php
>> Edited by arcturus on Sunday 18th April 11:32
The ADSL port itself (at least on the good filters) is itself filtered to prevent the telephone equipment interfering with the modem. It prevents harmonics and other electrical interference on the telephone network getting through to the modem.
It is worth spending a little extra on the filters. Some of the cheaper ones do not conform to the BT spec and can cause all sorts of problems.
For more in depth information, look here: www.adslnation.co.uk/support/filters.php
>> Edited by arcturus on Sunday 18th April 11:32
simpo two said:
You will need a microfilter (looks like a socket doubler) for every phone socket in your house. Otherwise, if you try using the phone when the PC is on, you'll get static varying from irritating to impossible. IIRC DABS do them for £4.00 each - or just do a search for 'ADSL microfilter'.
Correct but you do need a filter for every socket in the house for a good data circuit - according to the nice BT man who came to the house. Bought the D-link ones from DABS
COach
Of course...it depends how your phone sockets are wired. My upstairs extension is a simple DIY job that just plugs into a socket doubler downstairs. So I use the microfilter downstairs and effectively filter the entire upstairs extension for A/DSL.
Still, for the sake of 3-7 quid who cares?
In fact, why am I even writing this ?
Still, for the sake of 3-7 quid who cares?
In fact, why am I even writing this ?

miniman said:
KITT - I've got 2 spare in my loft. If you want one, mail me your address. They came with my wireless router which the company paid for, so you're welcome to have one!
Thanks for the offer Miniman but alas I've already ordered one! I'm sure someone else will take you up on that offer though

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