Re: Telephone Master Socket

["Rob Lamb" <rjl@xxxxxxxxxxxxxxxxxxxxxxxx>]

Keith,

perfection as usual! Many thanks,

Rob

--- In ukha_d@xxxxxxx, Keith Doxey <ukha@d...> wrote:
> Quoting Rob Lamb <rjl@s...>:
>
> > I've just got hold of an MDS Opera 308 PBX for the home, and it
says
> > that each extension needs a master socket. I've had a look
around
> > but there seems to be different types of master socket ( 1/4A,
2/4A,
> > 3/4A etc..) but don't really explain what the differences are.
Any
> > ideas as to which is the correct one and the best place to but
from?
> >
>
> Hi Rob
>
> Physical size.
>
> 1/ = a small rarely seen box about 40mm square (havent seen one
for about 20
> years!)
>
> 2/ = the ones often fitted to the skirting board about 60mm square.
>
> 3/ = normal single gang faceplate size with a single socket.
>
> there are also 4/ and 5/ faceplates which have two sockets on a
single gang
> faceplate. The difference between 4/ and 5/ is that one has two
sockets on the
> same circuit (double), the other has two independant circuits
(dual) but as I
> havent touched one for about 8 years I'm buggered if I can
remember which is
> which. (to be perfectly honest I could never remember which was
which even when
> I was using them!!!!)
>
> The part after the / denotes the connector and whether it it is
master, pbx or
> secondary.
>
> 1A = Master with surge protection
> 2A I think is PBX master but we always used 1A'a
> 3A = Secondary
> 3C is a reversed keyway Secondary used by some Digital PBX's.
>
> Normal BT lines would usually have the following setups
>
> Older lines
>
> 2/1A-----2/3A----2/3A
>
> 3/1A-----3/3A----3/3A
>
> Current lines
>
> NTE5-----2/3A------2/3A
>
> NTE5-----3/3A------3/3A
>
>
> Numbers above 3 are the same as 1/2/3/ but with screw terminals
instead of IDC
> punchdowns. Dont have any more info on the 4/5/6/ as we only used
IDC types.
>
> Hope that helps
>
> Keith
>
> www.diyha.co.uk
> www.kat5.tv



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