In my office, I have a 10 year old AT&T Spirit phone system. Black box on
the wall in one room, and in the other room, 2 phones. 2 incoming lines,
total. The only other hint I have about the box is that when I've shopped
for a headset, tech support people have said "Oh yeah...that's a digital
system".

The box does all sorts of logic and phonebook memory for the 2 phones.
Ancient, but I'm stuck with it. DSL comes in on line 2, the rollover line.
Plugging a 2-line DSL filter into the jack (where my phone plugs into the
wall) kills the signal totally on both lines. Not good. Makes no sense to me
because the phone line has 4 conductors, like any 2-line phone. If the DSL
filter supposedly passes the audio through, removing the DSL interference,
shouldn't it also pass through whatever other control signals the phone and
the black box are sending each other?

Does such a system need its DSL filtering done BEFORE the black box? If so,
I'm going to need a DSL filter that can be hardwired, both before and after
the filter. Can't find those.

Yes, the DSL wiring needs to go before the black box.

You can install a modular phone jack (on the DSL line only) where it comes
in from outside, then plug the filter into that and wire a modular plug to
the black box wire. Then run a separate line (non-filtered) to your DSL
modem.

If you don't know how to do this, best to have the phone company come out
and do it for you.

DSL uses a certain frequency range of your phone line which you can't hear.
Sometimes phone equipment will "bleed over" and cause disturbance in this
frequency range. The filter prevents your other phone equipment from doing
his by restricting its frequency range. The other phone equipment which can
cause problems is your black box and phones, so this is why the filter
should be before the black box...


"Doug Kanter" wrote in message
In my office, I have a 10 year old AT&T Spirit phone system. Black box on
the wall in one room, and in the other room, 2 phones. 2 incoming lines,
total. The only other hint I have about the box is that when I've shopped
for a headset, tech support people have said "Oh yeah...that's a digital
system".

The box does all sorts of logic and phonebook memory for the 2 phones.
Ancient, but I'm stuck with it. DSL comes in on line 2, the rollover
line.
Plugging a 2-line DSL filter into the jack (where my phone plugs into the
wall) kills the signal totally on both lines. Not good. Makes no sense to
me
because the phone line has 4 conductors, like any 2-line phone. If the
DSL
filter supposedly passes the audio through, removing the DSL
interference,
shouldn't it also pass through whatever other control signals the phone
and
the black box are sending each other?

Does such a system need its DSL filtering done BEFORE the black box? If
so,
I'm going to need a DSL filter that can be hardwired, both before and
after
the filter. Can't find those.

Thanks for the info, Bill. I can handle the wiring, but another idea comes
to mind. My fax line bypasses the AT&T box completely, and its jack sits
right next to the fax machine and the DSL modem. I'm going to have the phone
co. switch the DSL to that line. Voila. No wiring - just plug in the
filter/splitter.

"Bill" wrote in message
...
Yes, the DSL wiring needs to go before the black box.

You can install a modular phone jack (on the DSL line only) where it comes
in from outside, then plug the filter into that and wire a modular plug to
the black box wire. Then run a separate line (non-filtered) to your DSL
modem.

If you don't know how to do this, best to have the phone company come out
and do it for you.

DSL uses a certain frequency range of your phone line which you can't
hear.
Sometimes phone equipment will "bleed over" and cause disturbance in this
frequency range. The filter prevents your other phone equipment from doing
his by restricting its frequency range. The other phone equipment which
can
cause problems is your black box and phones, so this is why the filter
should be before the black box...


"Doug Kanter" wrote in message
In my office, I have a 10 year old AT&T Spirit phone system. Black box
on
the wall in one room, and in the other room, 2 phones. 2 incoming lines,
total. The only other hint I have about the box is that when I've
shopped
for a headset, tech support people have said "Oh yeah...that's a digital
system".

The box does all sorts of logic and phonebook memory for the 2 phones.
Ancient, but I'm stuck with it. DSL comes in on line 2, the rollover
line.
Plugging a 2-line DSL filter into the jack (where my phone plugs into
the
wall) kills the signal totally on both lines. Not good. Makes no sense
to
me
because the phone line has 4 conductors, like any 2-line phone. If the
DSL
filter supposedly passes the audio through, removing the DSL
interference,
shouldn't it also pass through whatever other control signals the phone
and
the black box are sending each other?

Does such a system need its DSL filtering done BEFORE the black box? If
so,
I'm going to need a DSL filter that can be hardwired, both before and
after
the filter. Can't find those.

That would be an easy wiring solution, but you may/may not have problems
with your FAX if it also has DSL on it. (My neighbor did.)

Maybe you have spare wires on your FAX line (4 or 6 wire line?) which can
be used for your DSL from the black box area? You would only need two wires
for your FAX and two wires for your DSL...



"Doug Kanter" wrote in message
Thanks for the info, Bill. I can handle the wiring, but another idea
comes
to mind. My fax line bypasses the AT&T box completely, and its jack sits
right next to the fax machine and the DSL modem. I'm going to have the
phone
co. switch the DSL to that line. Voila. No wiring - just plug in the
filter/splitter.

"Bill" wrote in message
...
Yes, the DSL wiring needs to go before the black box.

You can install a modular phone jack (on the DSL line only) where it
comes
in from outside, then plug the filter into that and wire a modular plug
to
the black box wire. Then run a separate line (non-filtered) to your DSL
modem.

If you don't know how to do this, best to have the phone company come
out
and do it for you.

DSL uses a certain frequency range of your phone line which you can't
hear.
Sometimes phone equipment will "bleed over" and cause disturbance in
this
frequency range. The filter prevents your other phone equipment from
doing
his by restricting its frequency range. The other phone equipment which
can
cause problems is your black box and phones, so this is why the filter
should be before the black box...


"Doug Kanter" wrote in message
In my office, I have a 10 year old AT&T Spirit phone system. Black
box
on
the wall in one room, and in the other room, 2 phones. 2 incoming
lines,
total. The only other hint I have about the box is that when I've
shopped
for a headset, tech support people have said "Oh yeah...that's a
digital
system".

The box does all sorts of logic and phonebook memory for the 2
phones.
Ancient, but I'm stuck with it. DSL comes in on line 2, the rollover
line.
Plugging a 2-line DSL filter into the jack (where my phone plugs into
the
wall) kills the signal totally on both lines. Not good. Makes no
sense
to
me
because the phone line has 4 conductors, like any 2-line phone. If
the
DSL
filter supposedly passes the audio through, removing the DSL
interference,
shouldn't it also pass through whatever other control signals the
phone
and
the black box are sending each other?

Does such a system need its DSL filtering done BEFORE the black box?
If
so,
I'm going to need a DSL filter that can be hardwired, both before and
after
the filter. Can't find those.

Anything (other than the DSL modem) that connects to phone
line 'not through filter' will eat your DSL signal. Filter
isolated DSL signal from not DSL equipment - to keep your
phone and fax from eating the DSL signal. Filter does not keep
phone and fax from bleeding over. It keeps phone and fax from
eating your DSL signal. Changing phone line sounds one simple
solution.

A major eater of DSL signals (a usual suspect) are plug-in
protectors; that don't provide effective protection anyway and
cost more money than effective protectors.

Doug Kanter wrote:
Thanks for the info, Bill. I can handle the wiring, but another idea
comes to mind. My fax line bypasses the AT&T box completely, and its
jack sits right next to the fax machine and the DSL modem. I'm going
to have the phone co. switch the DSL to that line. Voila. No wiring -
just plug in the filter/splitter.

Sounds good...but you'll still need a single line filter for the fax
machine. Put one of those line splitters on your fax line where it comes
out of the wall. (the kind that provides two female outlets to the same
line); put a dsl filter on one line and run it to your fax; run a line to
your dsl modem off the other female tap.
"Doug Kanter" wrote in message
news
Thanks for the info, Bill. I can handle the wiring, but another idea comes
to mind. My fax line bypasses the AT&T box completely, and its jack sits
right next to the fax machine and the DSL modem. I'm going to have the
phone
co. switch the DSL to that line. Voila. No wiring - just plug in the
filter/splitter.

"Bill" wrote in message
...
Yes, the DSL wiring needs to go before the black box.

You can install a modular phone jack (on the DSL line only) where it
comes
in from outside, then plug the filter into that and wire a modular plug
to
the black box wire. Then run a separate line (non-filtered) to your DSL
modem.

If you don't know how to do this, best to have the phone company come
out
and do it for you.

DSL uses a certain frequency range of your phone line which you can't
hear.
Sometimes phone equipment will "bleed over" and cause disturbance in
this
frequency range. The filter prevents your other phone equipment from
doing
his by restricting its frequency range. The other phone equipment which
can
cause problems is your black box and phones, so this is why the filter
should be before the black box...


"Doug Kanter" wrote in message
In my office, I have a 10 year old AT&T Spirit phone system. Black box
on
the wall in one room, and in the other room, 2 phones. 2 incoming
lines,
total. The only other hint I have about the box is that when I've
shopped
for a headset, tech support people have said "Oh yeah...that's a
digital
system".

The box does all sorts of logic and phonebook memory for the 2 phones.
Ancient, but I'm stuck with it. DSL comes in on line 2, the rollover
line.
Plugging a 2-line DSL filter into the jack (where my phone plugs into
the
wall) kills the signal totally on both lines. Not good. Makes no sense
to
me
because the phone line has 4 conductors, like any 2-line phone. If the
DSL
filter supposedly passes the audio through, removing the DSL
interference,
shouldn't it also pass through whatever other control signals the
phone
and
the black box are sending each other?

Does such a system need its DSL filtering done BEFORE the black box?
If
so,
I'm going to need a DSL filter that can be hardwired, both before and
after
the filter. Can't find those.