Fitting of connector

Before you change anything - is this a new device you are hooking up or had this thing worked in the past? First thing to do is reboot everything starting with the modem and ending with the computer at the end of the line. Wait at least 30 seconds between each device. Review all the connections - everything plugged in where it should be? (this is of course your question - see more below).

Eithernet connections (plugs) are RJ-45. The RJ-45 looks like a RJ-11 (telephone jack) only bigger. Typically, the RJ-45 will not fit into the RJ-11 AND SHOULD NOT. Why? Your Cat 5 eithernet runs on very low voltage and signal (packet switching). If you succedssfully get the RJ-45 CAT 5 cable into the RJ-11 phone jack, when the phone rings, you will be sending 60 volts into your network. Can you spell "Do I smell smoke?" A RJ-11 will have up to 6 wires (one pair or two pair or three pair) in the jack and up to 6 'buds' on the RJ-11 plug. A RJ-45 will have 8 wires (in the jack) and 8 'buds' on the plug of your cat 5.

Your device may say DSL on the Cat 5 connection - count the wires inside or the jack.

There are other Cat 5 connection types, punch down and terminal screw types, I dont think you are talking about either.

On your AT&T modem, you should find a RJ-11 which will attach to a near by telephone jack and a RJ-45 for your Cat 5 cable. Your modem may also serve as a router and as such would have additional RJ-45 ports. I suspect you are using a separate router for your home network. As such, one of the ports on the router should be marked Internet or Upload or maybe it is a special color or is set aside from the other ports. That special port will be connected to your modem and your other computers will use the other, lesser ports.

Of course, you could call your service provider for clarification also.

Thank you for your question @ FixYa.com - I am sorry you are having this trouble and I hope I have helped you in some way. I hope you are able to get your system back up in short order.

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The only "outputs" from a DSL-router are:
* RJ-11 telephone-jack, only if the router also supports voice-over-IP,
* RJ-45 Ethernet port (always present)

You need to purchase an internal network-card, to create an RJ-45 port on the computer, and then use the CAT-5e cable to make the connection.

Your question is a little confusing ... chain saw networks?

I believe you want to know how to build a wired computer network ...

You will need special tools to do this including a RJ-45 crimp tool. You should use the highest quality ethernet, 'Cat 5', Cat 5e', wire available to you. On the ends you will install RJ-45 connectors (8 conductor 'plugs'. Choose and stick with one of the several color codes for placing the conductors into the RJ-45. Color code guide should come with your special tool. Make sure the ends are in proper order, trimed square and inserted fully into the connector before you crimp. Purchase a test tool to verify your work. Expect to pay $50.00 US or more for the testing tool. Cable, connectors, wire, router or switch and other hardware should be available where communications or electrial supplies are sold.

Thank you for your interest in FixYa.com

From what I remember you would need a 'rollover cable' that connects the pins to each other in reverse order (e.g. 1 to 8, 2 to 7, 3 to 6, 4 to 5, 5 to 4, 6 to 3, 7 to 2, 8 to 1)

Is this XP or Vista or 7? You are silent as to the OS, the computer and the router - making it difficult to narrow down the possibilities.

Have you run the wizard to setup a home of small office network?

Have your run your router's software?

Have you indeed connected your computer to your router using 8 conductor Cat 5 ethernet wire?

You are pluged into a RJ-45 outlet in your computer not the RJ-11 modem connection?

RJ-11 with telephone wire will fit into a RJ-45 outlet but it will not work.

Be advised that if you plug a phone wire into your NIC (Network Interfact Card) and the other end into your telephone jack, when the phone rings, that wire will shoot 60 volts into your computer ... there will be the smell of fried components, the sound of gnashing teeth and the sound of a sash register in your future..

What are you doing? Are we talking about telephones (RJ-11) or are we talking about routers and ethernet cable (RJ-45)?????

RJ-11 will fit into a RJ-45 but a RJ-45 will not fit into a RJ-11. Translation, your telephone wire will plug into your router/computer port but your Ethernet wire will not fit into your telephone jack.

If you are working on a telephone, as long as you have dial tone on the other end, it doesn't make a big difference. You should have a polarity checker to insure proper polarity but even if it is wrong, most phones will work most of the time. Get a polarity checker at Radio Shack for about $10.00

If you are working on a router ... well, it is no wonder your network will not work. You cannot split one RJ-45 port into two "Ports" using a telephone RJ-11 splitter. Never, Never, Never, plug your router cable into a telephone jack (RJ-11). Yea, Yea, Yea, I know, I just said a RJ-45 will not fit into a RJ-11 but if you have a telephone cord pluged into the router, guess what, 60 Volts will smoke it. When the phone rings, it rings with 60+ volts and will smoke any computer device it can smoke looking for ground.

If you need more computer ports, get a bigger router or bigger switch or bigger hub or get a wireless router to accomodate your wireless devices.

I hope I have answered your question.

Thanks for your interest in FixYa.com

The order you give is right. Ethernet uses the orange pair and the green pair (1, 2, 3, 6). Phone uses the blue pair (4, 5).

RJ -45 is a type of connector used on cat5, cat5e....etc cables to connect networked devices...the RJ stands for registered jack but there is really not much you really need to know about it....a RJ 45 JACK is a little bigger than a telephone jack, you'll notice the female type of input on your computer or laptop and the male end will be on the end of the cable that goes into this jack....hope this helps

If you're doing both ends, it doesn't matter. I tend to use "B" because if the other end is a patch panel, it natively (ie all wires in order) comes as a "B" panel. Less thinking on my part :-)

Carl

If it is a RJ-45 connector yes you can use it, The landline uses a RJ11. If the cale fits in the connector then it is a RJ45 connector and you can use this connection. If it works with your internet connection take the netwotk card you bought back. Hope this helps.