D&C Lug - Home Page
Devon & Cornwall Linux Users' Group

[ Date Index ][ Thread Index ]
[ <= Previous by date / thread ] [ Next by date / thread => ]

Re: [LUG] OT: D-Link



Quoting Julian Hall:

You would never need a filter *if* the modem were the only device on the
line.  The filter separates out the datastream from the voice traffic. 
If there is any other device on the same circuit using analogue signals,
such as the list given earlier, Sky boxes etc, they will screw up the
signals.

I (respectfully) disagree, you only need a microfilter on any analouge device, 
thus:
http://www.thecaretaker.org.uk/images/option3.JPG
(this is how my house is wired)

If you look at this diagram of a microfilter, you can see that the adsl modem 
socket is passed directly through from the BT socket, the filtering only takes 
place on the socket you plug a phone into.
http://www.adslnation.com/images/filters/YPL-002-microfilter.gif

One point I *did* forget.  You need *every* socket in use on the same
circuit to be filtered.  Same circuit being the same phone number.  So
if you have two phones, a fax and the modem you need 4 filters.  However
if you have 4 sockets, but only two in use you only need 2.

Two phones, one fax and an adsl modem only requires three filters.

Alex.

--
The Mailing List for the Devon & Cornwall LUG
Mail majordomo@xxxxxxxxxxxx with "unsubscribe list" in the
message body to unsubscribe.



Lynx friendly