Every socket with a filter?

I've been told/read that every telephone socket, wired from the master
socket, should have a filter attached to it even if the telephone device is
not being used.

Can someone give a technical explanation as to why this is i.e. why every
socket/device should be connected to a filter even if not in use?

Gareth.

"Gareth" <(E-Mail Removed)> wrote in message
news:41851e0e$0$33600$(E-Mail Removed)...
> I've been told/read that every telephone socket, wired from the master
> socket, should have a filter attached to it even if the telephone device
> is not being used.
>
> Can someone give a technical explanation as to why this is i.e. why every
> socket/device should be connected to a filter even if not in use?
>
> Gareth.
>

If the socket is not in use. ie. nothing plugged into it, then no filter is
needed at this point.

Each POTS phone must go through one filter.

The ADSL modem/ router should/must go through one filter.

"Gareth" <(E-Mail Removed)> wrote in message
news:41851e0e$0$33600$(E-Mail Removed)...
> I've been told/read that every telephone socket, wired from the master
> socket, should have a filter attached to it even if the telephone device
is
> not being used.
>
> Can someone give a technical explanation as to why this is i.e. why every
> socket/device should be connected to a filter even if not in use?
>

Could not get my fax/phone/ans.m.c and 2 other ordinary phone to work
correctly when 3 filters used.
Only correct working when ONE filter used for whole house.
--
Regards,
David
<><
Please reply to News Group.

In an earlier contribution to this discussion,
wooosh <(E-Mail Removed)> wrote:

> "Gareth" <(E-Mail Removed)> wrote in message
> news:41851e0e$0$33600$(E-Mail Removed)...
>> I've been told/read that every telephone socket, wired from the
>> master socket, should have a filter attached to it even if the
>> telephone device is not being used.
>>
>> Can someone give a technical explanation as to why this is i.e. why
>> every socket/device should be connected to a filter even if not in
>> use?
>>
>> Gareth.
>>
>
> If the socket is not in use. ie. nothing plugged into it, then no
> filter is needed at this point.

Correct.

>
> Each POTS phone must go through one filter.
>
Every analog device (phone, fax etc.) which is plugged in must be connected
in a way which is filtered - either with an individual filter in its socket,
or with a filtered faceplate on the master socket which automatically
filters all extension sockets without requiring plug-in filters.

If analog devices are not filtered, you may get high frequency noise audible
on the phones. Worse still, any unfiltered analog device plugged in (it
doesn't have to be off-hook) can stop the ADSL line from synchronising.

> The ADSL modem/ router should/must go through one filter.

Positively *untrue*! All ADSL equipment must be *unfiltered* - otherwise it
won't work. It is sometimes convenient to plug it into the ADSL socket on a
microfilter because this provides the necessary plug conversion from BT to
RJ11. BUT, the important thing is that this socket is actually *unfiltered*,
and is connected directly to the incoming pair.
--
Cheers,
Tim
______
Please reply to newsgroup. Reply address is invalid.

In article <(E-Mail Removed)>, Tiscali Tim
<(E-Mail Removed)> wrote:

> BUT, the important thing is that this socket is actually *unfiltered*,
> and is connected directly to the incoming pair.

Which is why I always tell people to regard the line as an adsl line
over which telephones can operate provided they have appropriate
filters.

A bit pedantic I know

--
Adrian
Adrian 'at' therefuge dot co dot uk

"Theory and practice are the same in theory, but different in practice"

Tiscali Tim wrote:
> In an earlier contribution to this discussion,
> wooosh <(E-Mail Removed)> wrote:
>
>> "Gareth" <(E-Mail Removed)> wrote in message
>> news:41851e0e$0$33600$(E-Mail Removed)...
>>> I've been told/read that every telephone socket, wired from the
>>> master socket, should have a filter attached to it even if the
>>> telephone device is not being used.
>>>
>>> Can someone give a technical explanation as to why this is i.e. why
>>> every socket/device should be connected to a filter even if not in
>>> use?
>>>
>>> Gareth.
>>>
>>
>> If the socket is not in use. ie. nothing plugged into it, then no
>> filter is needed at this point.
>
> Correct.
>
>>
>> Each POTS phone must go through one filter.
>>
> Every analog device (phone, fax etc.) which is plugged in must be
> connected in a way which is filtered - either with an individual
> filter in its socket, or with a filtered faceplate on the master
> socket which automatically filters all extension sockets without
> requiring plug-in filters.
>
> If analog devices are not filtered, you may get high frequency noise
> audible on the phones. Worse still, any unfiltered analog device
> plugged in (it doesn't have to be off-hook) can stop the ADSL line
> from synchronising.
>
>> The ADSL modem/ router should/must go through one filter.
>
> Positively *untrue*! All ADSL equipment must be *unfiltered* -
> otherwise it won't work. It is sometimes convenient to plug it into
> the ADSL socket on a microfilter because this provides the necessary
> plug conversion from BT to RJ11. BUT, the important thing is that
> this socket is actually *unfiltered*, and is connected directly to
> the incoming pair.

Actually that is not true as it can happen that the ringing current (when
the line is called) will cause the DSL service to loose synch, if it's not
filtered as is so easily proved with the 'new test leads which the field
engineers are supposed to use (because the filters don't have test clips on
them, mine do) , also some phones will/can cause problems when you try to
make a call out of them even if they are filtered.

You may get away without a filter but it best to play safe..

& here come the flames..........

"Kráftéé" <kraftee@spammersbogoff&die.kraftee.plus.com> wrote in message
news:4185606c$0$33639$(E-Mail Removed)...
> Actually that is not true as it can happen that the ringing current (when
> the line is called) will cause the DSL service to loose synch, if it's not
> filtered as is so easily proved with the 'new test leads which the field
> engineers are supposed to use (because the filters don't have test clips
> on them, mine do) , also some phones will/can cause problems when you try
> to make a call out of them even if they are filtered.
>
> You may get away without a filter but it best to play safe..
>
> & here come the flames..........

Hi Kraftee,

How the hell do you get the new APtS tester to work??? I keep getting "No IP
session detected" message - I'm using the proper test leads, and my coach is
useless...(my previous broadband coach is back on the tools so isn't
interested, my present coach can't even spell ADSL...)

Ali

Zomaar wrote:
> "Kráftéé" <kraftee@spammersbogoff&die.kraftee.plus.com> wrote in
> message news:4185606c$0$33639$(E-Mail Removed)...
>> Actually that is not true as it can happen that the ringing current
>> (when the line is called) will cause the DSL service to loose synch,
>> if it's not filtered as is so easily proved with the 'new test leads
>> which the field engineers are supposed to use (because the filters
>> don't have test clips on them, mine do) , also some phones will/can
>> cause problems when you try to make a call out of them even if they
>> are filtered. You may get away without a filter but it best to play
>> safe..
>>
>> & here come the flames..........
>
> Hi Kraftee,
>
> How the hell do you get the new APtS tester to work??? I keep getting
> "No IP session detected" message - I'm using the proper test leads,
> and my coach is useless...(my previous broadband coach is back on the
> tools so isn't interested, my present coach can't even spell ADSL...)
>
> Ali

If you are getting a result at the end don't worry, it's not your kit it's
the crappy service which we are getting from the company which is contracted
to look after the test site. I get that around 75% of the time, but if you
notice the test takes slightly longer when you don't get the streaming video
(& at least it's not the ballet) & the test results are just as valid.

Know what you mean about the ADSL coaches, mine is an absolute idiot, no
matter what you contact him about he always gives the same potted answers,
he's even turned around & told a colleague to go & open every joint on a
route to try & solve a SNR problem on a line which is way out of spec, but
he gets the extra dosh I don't, so musn't question him (like hell I won't)..

Take care, don't let the idiots grind you down....

"Kráftéé" <kraftee@spammersbogoff&die.kraftee.plus.com> wrote in message
news:4185606c$0$33639$(E-Mail Removed)...
> Tiscali Tim wrote:
>> In an earlier contribution to this discussion,
>> wooosh <(E-Mail Removed)> wrote:
>>
>>> "Gareth" <(E-Mail Removed)> wrote in message
>>> news:41851e0e$0$33600$(E-Mail Removed)...
>>>> I've been told/read that every telephone socket, wired from the
>>>> master socket, should have a filter attached to it even if the
>>>> telephone device is not being used.
>>>>
>>>> Can someone give a technical explanation as to why this is i.e. why
>>>> every socket/device should be connected to a filter even if not in
>>>> use?
>>>>
>>>> Gareth.
>>>>
>>>
>>> If the socket is not in use. ie. nothing plugged into it, then no
>>> filter is needed at this point.
>>
>> Correct.
>>
>>>
>>> Each POTS phone must go through one filter.
>>>
>> Every analog device (phone, fax etc.) which is plugged in must be
>> connected in a way which is filtered - either with an individual
>> filter in its socket, or with a filtered faceplate on the master
>> socket which automatically filters all extension sockets without
>> requiring plug-in filters.
>>
>> If analog devices are not filtered, you may get high frequency noise
>> audible on the phones. Worse still, any unfiltered analog device
>> plugged in (it doesn't have to be off-hook) can stop the ADSL line
>> from synchronising.
>>
>>> The ADSL modem/ router should/must go through one filter.
>>
>> Positively *untrue*! All ADSL equipment must be *unfiltered* -
>> otherwise it won't work. It is sometimes convenient to plug it into
>> the ADSL socket on a microfilter because this provides the necessary
>> plug conversion from BT to RJ11. BUT, the important thing is that
>> this socket is actually *unfiltered*, and is connected directly to
>> the incoming pair.
>
> Actually that is not true as it can happen that the ringing current (when
> the line is called) will cause the DSL service to loose synch, if it's not
> filtered as is so easily proved with the 'new test leads which the field
> engineers are supposed to use (because the filters don't have test clips
> on them, mine do) , also some phones will/can cause problems when you try
> to make a call out of them even if they are filtered.
>
> You may get away without a filter but it best to play safe..
>
> & here come the flames..........

Interesting. Is it possible that the ringing current - even without an
attached phone - can cause loss of synch or even just a dropped connection?

Gareth.

Gareth wrote:
> "Kráftéé" <kraftee@spammersbogoff&die.kraftee.plus.com> wrote in
> message news:4185606c$0$33639$(E-Mail Removed)...
>> Tiscali Tim wrote:
>>> In an earlier contribution to this discussion,
>>> wooosh <(E-Mail Removed)> wrote:
>>>
>>>> "Gareth" <(E-Mail Removed)> wrote in message
>>>> news:41851e0e$0$33600$(E-Mail Removed)...
>>>>> I've been told/read that every telephone socket, wired from the
>>>>> master socket, should have a filter attached to it even if the
>>>>> telephone device is not being used.
>>>>>
>>>>> Can someone give a technical explanation as to why this is i.e.
>>>>> why every socket/device should be connected to a filter even if
>>>>> not in use?
>>>>>
>>>>> Gareth.
>>>>>
>>>>
>>>> If the socket is not in use. ie. nothing plugged into it, then no
>>>> filter is needed at this point.
>>>
>>> Correct.
>>>
>>>>
>>>> Each POTS phone must go through one filter.
>>>>
>>> Every analog device (phone, fax etc.) which is plugged in must be
>>> connected in a way which is filtered - either with an individual
>>> filter in its socket, or with a filtered faceplate on the master
>>> socket which automatically filters all extension sockets without
>>> requiring plug-in filters.
>>>
>>> If analog devices are not filtered, you may get high frequency noise
>>> audible on the phones. Worse still, any unfiltered analog device
>>> plugged in (it doesn't have to be off-hook) can stop the ADSL line
>>> from synchronising.
>>>
>>>> The ADSL modem/ router should/must go through one filter.
>>>
>>> Positively *untrue*! All ADSL equipment must be *unfiltered* -
>>> otherwise it won't work. It is sometimes convenient to plug it into
>>> the ADSL socket on a microfilter because this provides the necessary
>>> plug conversion from BT to RJ11. BUT, the important thing is that
>>> this socket is actually *unfiltered*, and is connected directly to
>>> the incoming pair.
>>
>> Actually that is not true as it can happen that the ringing current
>> (when the line is called) will cause the DSL service to loose synch,
>> if it's not filtered as is so easily proved with the 'new test leads
>> which the field engineers are supposed to use (because the filters
>> don't have test clips on them, mine do) , also some phones will/can
>> cause problems when you try to make a call out of them even if they
>> are filtered. You may get away without a filter but it best to play
>> safe..
>>
>> & here come the flames..........
>
> Interesting. Is it possible that the ringing current - even without an
> attached phone - can cause loss of synch or even just a dropped
> connection?

Well it happens when I'm testing in the PCP (& elsewhere in the local
network) using the official unfiltered leads. Easily cobbled up a lead
consisting of a normal filter & a 6/10e test lead (crock clips on the end) &
it doesn't happen anymore