You need a good quality twisted-pair cable, or CAT5 if you can get it, and
make sure that all connections are tight. Try not to make tight bends in
the cable if a natural bend can be made. So don't hammer it in to corners.
Twisted pair cable can be any amount of pairs, and the best one to choose is
up to you on price. If wiring as an extension from the master sockets, then
you will need ringer wiring to the two new sockets as well as line wiring.
Which means three wires instead of two. So it might be best to buy two
master sockets from Screwfix or other, and wire the new extensions as direct
line from the original master sockets.
For the ADSL, try to make the wiring in two of the pairs, and make the pairs
the closest together in the bundle. So, if the red/white and blue/white are
the closest together, then use both of these pairs. Wire them as if two
individual pairs, but wire them to the same connections in the boxes, if you
get my meaning. Don't separate the single wires of the pairs.
The telephone voice line can be left on one pair. So it depends on what you
mean to do at the extension site, and if you want to wire as direct line
from the master sockets (recommended), or as completely separate extensions
with ringer wiring.
Search the web for "UK telephone wiring standard" for a few good hits on the
These are extensions, as in what is currently six foot away from the
current master sockets via two cables. I want to run the same down one
cable, over a greater distance ...... do I truly have to be *that*
Indeed it is - but I'd be inclined to use only one pair per line
(using terminals 2 and 5) and put master sockets at the end. On the
ADSL line the ADSL filter will probably include a ringing capacitor
anyway so a normal slave socket will probably be sufficient.
The reason for using only a single pair per line is that the single
pair balanced line is quite immune to interference, adding the third
ringing line makes it a bit more susceptible to noise/crosstalk.
Not quite a solution, but a suggestion might be to get yourself an SOHO
pbx, such as the BT Revelation which will take both lines into it, and
give you 6 extensions to play with. Then you need only run one extension
to the summerhouse, and 5 more to other parts of the house.
The fax detection stuff is kind of handy as well if one of those lines
is predominatley used to recieve faxes on as it can redirect it to your
fax machine without ringing the other extensions.
This has been an interesting thread and has demonstrated that the OP had
choosen the right cable for the installation in mind and could possibly go
down to a lesser number of wires, say just 2 pairs terminating into master
A small flaw is that eventually it might be desired to run a network back to
the main house/building. If that were the case I seem to remember that there
was equipment around that places a 'box' on each end of four core telephone
cable to which CAT5 cable can be connected; are such pieces of equipment still
arround? But there again I see there is now available a couple of plugs that
can be plugged into the electricity supply to do the same thing. Is one
method better than the other?
Well there was 100base-VG ethernet, which HP pushed as a technology
to pass 100Mbit ethernet over Cat 3 (regular voice grade wiring)
using 2 pairs, but it never caught on. Might find some old kit around,
but no one makes it anymore.
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