BNC to RJ45

Hi,

The previous owner of my flat installed a network with wall sockets
suitable to plug a BNC style network connector into.

My hub has only RJ45 connectors. Is there some kind of converter that will
plug into the BNC holes and give me a RJ45 socket? If so, what do I need?

Thanks,

MS

MS wrote:
> Hi,
>
> The previous owner of my flat installed a network with wall sockets
> suitable to plug a BNC style network connector into.
>
> My hub has only RJ45 connectors. Is there some kind of converter that
> will plug into the BNC holes and give me a RJ45 socket? If so, what
> do I need?
You can't just plug a cable adaptor in , as RJ45 uses 4 wires (for 10/100 at
least) in twisted pairs but the BNC cable has a coax cable behind it.


You can get transceivers to bridge between BNC thin-net sections of a
network and RJ45 wired sections but they cost a few quid each second hand
(usually in the form of a hub with both types of port) and you'll only get
10mb speeds anyway.

Just ignore the existing wiring and put your own in if he has trunked the
cable correctly or go wireless.


--
Alex

Piece by piece the penguins have taken my sanity
www.drzoidberg.co.uk www.ebayfaq.co.uk

Dr Zoidberg emailed this:
> MS wrote:
>> Hi,
>>
>> The previous owner of my flat installed a network with wall sockets
>> suitable to plug a BNC style network connector into.
>>
>> My hub has only RJ45 connectors. Is there some kind of converter that
>> will plug into the BNC holes and give me a RJ45 socket? If so, what
>> do I need?
> You can't just plug a cable adaptor in , as RJ45 uses 4 wires (for 10/100 at
> least) in twisted pairs but the BNC cable has a coax cable behind it.
>
>
> You can get transceivers to bridge between BNC thin-net sections of a
> network and RJ45 wired sections but they cost a few quid each second hand
> (usually in the form of a hub with both types of port) and you'll only get
> 10mb speeds anyway.
>
> Just ignore the existing wiring and put your own in if he has trunked the
> cable correctly or go wireless.

Thanks Doc. How do I tell if he has 'trunked the cable correctly'?
(BTW I'm not sure what this means).

Cheers,

MS

On 25 Jun 2006, MS <(E-Mail Removed)> wrote:

>Thanks Doc. How do I tell if he has 'trunked the cable correctly'?
>(BTW I'm not sure what this means).

<http://www.netshop.co.uk/productcategorydetail.aspx?categoryid=51823>
might be suitable for surface mounting, Some other types usable where
multiple cables might need to be pulled (and be sunk into plaster or
behind plasterboard, when a house it empty of occupants and undergoing
a rewiring job, for example.

--
Posted via a free Usenet account from http://www.teranews.com

MS wrote:

> Thanks Doc. How do I tell if he has 'trunked the cable correctly'?
> (BTW I'm not sure what this means).
>
Hopefully there will be a conduit running through the wall and the cable
itself is free to move inside it.
If so then you can attach your new cable to the end of the old one and then
feed it through without having to do much else.
If he has just plastered straight over the cable then there is no way to
replace it easily.
Just take the wall plate off and have a look
--
Alex

Piece by piece the penguins have taken my sanity
www.drzoidberg.co.uk www.ebayfaq.co.uk

Dr Zoidberg emailed this:
> MS wrote:
>
>> Thanks Doc. How do I tell if he has 'trunked the cable correctly'?
>> (BTW I'm not sure what this means).
>>
> Hopefully there will be a conduit running through the wall and the cable
> itself is free to move inside it.
> If so then you can attach your new cable to the end of the old one and then
> feed it through without having to do much else.
> If he has just plastered straight over the cable then there is no way to
> replace it easily.
> Just take the wall plate off and have a look

Thanks again Doc.

I've an update...

A friend has an old hub with a BNC socket as well as RJ45s which he'll
give to me. But I'm unsure how to set it up, especially with regards to
the BNC 'terminators'.

Basically the network just connects 2 rooms. What I'm intending to do is
to attach the BNC cable to the living room PC and then to the BNC socket
in the wall and then, at the other end of the network, attach another BNC
cable to the wall socket and from there to the hub. The other 2 PCs can be
directly connected to the hub using RJ45s. What I'm unsure of is where do
I attach the BNC 'terminators'? and does this setup sound ok?

Many thanks and regards,

MS

MS <(E-Mail Removed)> wrote in news:Uv9og.92168
$(E-Mail Removed):

> What I'm unsure of is where do
> I attach the BNC 'terminators'?

This site explains the cabling and where terminators go:
http://www.bitzenbytes.com/Content-Arcanum-18-1-30.html

BTW: You may regret your choice. IME thinwire Ethernet is very flaky
technology.

On 27 Jun 2006, MS <(E-Mail Removed)> wrote:

>But I'm unsure how to set it up, especially with regards to
>the BNC 'terminators'.

If you imagine the coax with (for sake of argument, 5) PCs connected
at intervals, each PC would connect to a T-piece so cable would go to
left and right. With the final PC having no PC on one side, therefore
no cable, there'd be a terminator plugged in to the T-piece. Same with
the PC at the other end of the chain. In your case, there could be one
plugged into a T-piece at the PC end, length of cable via the wall that
ends up on another T-piece connecting to the hub, and then you'd use a
second terminator. It could work OK without (though with errors, but
unless you're seeing major problems, can probably cope). I'm sure a
few people would have some terminators around if you have problems.

On Tue, 27 Jun 2006, Frazer Jolly Goodfellow <no-(E-Mail Removed)> wrote:

>IME thinwire Ethernet is very flaky technology.

Seemed to work fine for me from the mid-80s until 2-3 years ago, but much
depends on how large a network one has to manage, and therefore what type
of mistreatment might be applied in areas one does not visit very often.

"Peter M" <us-(E-Mail Removed)> wrote in message
news:(E-Mail Removed)
> On Tue, 27 Jun 2006, Frazer Jolly Goodfellow
> <no-(E-Mail Removed)> wrote:
>
> > IME thinwire Ethernet is very flaky technology.
>
> Seemed to work fine for me from the mid-80s until 2-3
> years ago, but much depends on how large a network one
> has to manage, and therefore what type of mistreatment
> might be applied in areas one does not visit very often.

When I worked for British Rail in the late 80's/early 90's we had entire
buildings wired with it. Multi-server Novell networks with 500+ machines,
but they were all running DOS so there wasn't the overhead you get with
Windows networks. Mind you it was still irritating when some fool
unplugged their machine from the coax to move it and cut everybody else on
the floor off..!

Ivor