RJ45 to BT or RJ11 connection?

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billgates

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#74647 4-Jan-2011 20:07

Hey folks. I have moved into a new apartment in Auckland and in the room, now there is an RJ45 socket for personal DSL connection. Vodafone will move my naked broadband over in a week or so. My modem is a standard ADSL2+ wifi modem/router which came with a RJ11 to BT cable and a RJ11 to RJ11 cable which is what you normally get. My old apartment had a BT connection at wall for me to plug the modem and cable into. I used the BT (went into wall) to RJ11 cable (went in the modem).

What do I do at this apartment? Would I need yo buy a RJ45 to BT adapter? OR RJ45 to RJ11 adapter and then use a RJ11 to RJ11 cable from the modem into the adapter?

Thanks

Do whatever you want to do man.

sbiddle

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#424040 4-Jan-2011 20:11

Either a BT master adapter (RJ45 to BT female) or a RJ45 to RJ11 cable that will plug straight into the wall and then into the modem.

Putting an RJ11 plug into an RJ45 socket isn't recommended as it can damage the outer pins.

richms

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#424041 4-Jan-2011 20:22

However, I have been putting RJ11s into 45s for ages and not had a single problem with them being repurposed for ethernet at home here. It may depend on the jack construction.

IMO, just plug it in if its a dedicated pstn jack that will never be used for ethernet again, and if it does get repurposed then worry about it then.

Richard rich.ms

billgates

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#424047 4-Jan-2011 20:39

Thanks. I have several RJ11 to RJ11 cables lying around here. Will be careful when inserting it in the RJ45 socket and when taking it out (hardly). There is another dedicated ethernet jack in the room which provides free internet @ 256kbps via orcon (No thank you).

Something new to learn. Never knew that a RJ11 plug could fit into a RJ45 socket.

Cheers

Do whatever you want to do man.

old3eyes

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#424138 5-Jan-2011 08:52

billgates: Thanks. I have several RJ11 to RJ11 cables lying around here. Will be careful when inserting it in the RJ45 socket and when taking it out (hardly). There is another dedicated ethernet jack in the room which provides free internet @ 256kbps via orcon (No thank you).

Something new to learn. Never knew that a RJ11 plug could fit into a RJ45 socket.

Cheers

Don't try it in the real world or you get your rear end kicked very quickly when some removes the RJ11 line cord and puts in a RJ45 LAN plug and it won't work and they have to pay someone to come and change out the jack.. We spend allot of time at work replacing the RJ11s that come on fone line cords with RJ54s for that reason..

Regards,

Old3eyes

nbroad

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#424271 5-Jan-2011 14:21

i used a cable from:

www.cablesdirect.co.nz
search for C-RJ1245-2

webwat

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#424275 5-Jan-2011 14:31

old3eyes:
billgates: Thanks. I have several RJ11 to RJ11 cables lying around here. Will be careful when inserting it in the RJ45 socket and when taking it out (hardly). There is another dedicated ethernet jack in the room which provides free internet @ 256kbps via orcon (No thank you).

Something new to learn. Never knew that a RJ11 plug could fit into a RJ45 socket.

Cheers

Don't try it in the real world or you get your rear end kicked very quickly when some removes the RJ11 line cord and puts in a RJ45 LAN plug and it won't work and they have to pay someone to come and change out the jack.. We spend allot of time at work replacing the RJ11s that come on fone line cords with RJ54s for that reason..

Since its an apartment that is unlikely to switch that phone jack to ethernet, I would say the RJ11 will be fine. If you want the modem lead to have a nice snug fit with the correct plug, perhaps I can get a cable to ya.

Time to find a new industry!

nbroad

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#424284 5-Jan-2011 14:41

webwat:
Since its an apartment that is unlikely to switch that phone jack to ethernet, I would say the RJ11 will be fine. If you want the modem lead to have a nice snug fit with the correct plug, perhaps I can get a cable to ya.

eh? the wall outlet is already RJ45. edit:..... sorry, i get what you mean now. that they are unlikely to use all 8 pins in the future? you never know. I'd prefer not to damage the outer pins.
an RJ45 to RJ12 from cablesdirect for $1-something or a modtap is all he needs.
RJ11/12 into RJ45 bugger the outer pins.

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billgates

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#425576 9-Jan-2011 22:38

hmm. I suppose in future the apartment might use that jack as an ethernet port (unlikely) so I'll stick to the right thing and buy the RJ45 to BT adapter. they are only like $5 at pb-tech

Do whatever you want to do man.

raytaylor

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#425587 10-Jan-2011 00:24

RJ 45 was designed so that it could be used as both an ethernet port and a telephone port so it was designed so that an RJ 11 could be safely plugged into it.

The centre pins (blue) are always used for telephone, and the outer pins are used for data.
So even if it was an ethernet plug, plugging in a telephone with an RJ11 cable will do no harm.

Ray Taylor

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nbroad

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#426811 13-Jan-2011 12:13

They fit but they do damage the outer pins. I tried it at home and could see quite clearly that after having an RJ11 in there, the outer pins had been forced up too far and had been permanently bent up which would reduce contact pressure if you were to plug an RJ45 back in there. Google 'rj11 into rj45 damage'.

raytaylor

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#426847 13-Jan-2011 13:40

Thats interesting. Ive never had a problem with it.

Ray Taylor

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