RJ-11 from Router to Microfilter

I've noticed with the RJ-11 from the router to the Microfilter on UK ADSL,
you can get either two pin or four pin versions of equipment, two pin or
four pin sockets on routers, two pin or four pin sockets on microfilters and
the same for cables.

I'm just wondering what the assignments are for the pins. I guess with the
two pin version it's just TX and RX, how about four pin? Are there any
advantages of having four right through over two right through?

Thanks

Lawrence Stromski.

Lawrence Stromski wrote:

> I've noticed with the RJ-11 from the router to the Microfilter on UK ADSL,
> you can get either two pin or four pin versions of equipment, two pin or
> four pin sockets on routers, two pin or four pin sockets on microfilters and
> the same for cables.
>
> I'm just wondering what the assignments are for the pins. I guess with the
> two pin version it's just TX and RX, how about four pin? Are there any
> advantages of having four right through over two right through?
>

A phone line from your house to the exchange is just a pair of wires.

Lawrence Stromski wrote:

> I'm just wondering what the assignments are for the pins. I guess with the
> two pin version it's just TX and RX, how about four pin? Are there any
> advantages of having four right through over two right through?

No. Only the middle two pins of the connector are used. Both wires are
Tx and Rx (not one each).

--
Cheers,

John.

/================================================== ===============\
| Internode Ltd - http://www.internode.co.uk |
|-----------------------------------------------------------------|
| John Rumm - john(at)internode(dot)co(dot)uk |
\================================================= ================/

Which begs another question:

At the back of the master BT analogue socket, there are four wires and four
terminals on the socket, all connected. Two redundant?

-Lawrence.


"Bat Guano" <bat.guano@talk21dotcom> wrote in message
news:(E-Mail Removed)...
> Lawrence Stromski wrote:
>
> > I've noticed with the RJ-11 from the router to the Microfilter on UK
ADSL,
> > you can get either two pin or four pin versions of equipment, two pin or
> > four pin sockets on routers, two pin or four pin sockets on microfilters
and
> > the same for cables.
> >
> > I'm just wondering what the assignments are for the pins. I guess with
the
> > two pin version it's just TX and RX, how about four pin? Are there any
> > advantages of having four right through over two right through?
> >
>
> A phone line from your house to the exchange is just a pair of wires.
>

Maybe one redundant - BT have a 'ring' wire.

Lawrence Stromski wrote:
> Which begs another question:
>
> At the back of the master BT analogue socket, there are four wires and four
> terminals on the socket, all connected. Two redundant?
>
> -Lawrence.
>
>
> "Bat Guano" <bat.guano@talk21dotcom> wrote in message
> news:(E-Mail Removed)...
>
>>Lawrence Stromski wrote:
>>
>>
>>>I've noticed with the RJ-11 from the router to the Microfilter on UK
>
> ADSL,
>
>>>you can get either two pin or four pin versions of equipment, two pin or
>>>four pin sockets on routers, two pin or four pin sockets on microfilters
>
> and
>
>>>the same for cables.
>>>
>>>I'm just wondering what the assignments are for the pins. I guess with
>
> the
>
>>>two pin version it's just TX and RX, how about four pin? Are there any
>>>advantages of having four right through over two right through?
>>>
>>
>>A phone line from your house to the exchange is just a pair of wires.
>>
>
>
>

Pretty much. Two of the four connected pins on a BT plug/socket carry
pretty much everything nowdays. One of the other two is the bell
shunt for older pulse-dialling equipment; the final one is the PABX
earth recall for use with switchboards.

Cheers - Ian

On Thu, 25 Sep 2003 11:51:43 +0000 (UTC), "Lawrence Stromski"
<(E-Mail Removed)> wrote:

>Which begs another question:
>
>At the back of the master BT analogue socket, there are four wires and four
>terminals on the socket, all connected. Two redundant?
>
>-Lawrence.
>
>
>"Bat Guano" <bat.guano@talk21dotcom> wrote in message
>news:(E-Mail Removed)...
>> Lawrence Stromski wrote:
>>
>> > I've noticed with the RJ-11 from the router to the Microfilter on UK
>ADSL,
>> > you can get either two pin or four pin versions of equipment, two pin or
>> > four pin sockets on routers, two pin or four pin sockets on microfilters
>and
>> > the same for cables.
>> >
>> > I'm just wondering what the assignments are for the pins. I guess with
>the
>> > two pin version it's just TX and RX, how about four pin? Are there any
>> > advantages of having four right through over two right through?
>> >
>>
>> A phone line from your house to the exchange is just a pair of wires.
>>
>

"Ian Noble" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
>
> Pretty much. Two of the four connected pins on a BT plug/socket carry
> pretty much everything nowdays. One of the other two is the bell
> shunt for older pulse-dialling equipment; the final one is the PABX
> earth recall for use with switchboards.
>
> Cheers - Ian
>

Your Dad wouldn't happen to be Malcom, would it?

John.