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Configuring DSL for All RJ-45 Jacks

We just moved into a house that is preconfigured for all jacks to be CAT 5 RJ45. The DSL modem only allows for a single PC to be connected. I have a Linksys Etherfast Cable/DSL Router and appropriate network cables/Ethernet cards, but don't want to drill any holes in walls. Is there a method to run the DSL modem to the phone input coming into the house in such way that every jack is live for phone (currently) and DSL? We have 5 PC's that need to occasionally share the DSL modem..

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The simpliest way is to have a wireless/ wired 4 ports router and install it beside your modem and locate where your Cat 5 cables central end is. Identify the Cat 5s that are connected to the 5 locations of your PCs if all of them are not capable of wireless connection you need to add a switch (4 port or 8 port) which you also need to connect to one Lan port of your router.

Hope this helps.

Posted on Apr 18, 2008

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What jack does the Slingbox Ethernet cable hook into on a ATT 2wire modem? I have a choice of DSL or one like the phones are hooked into. It's not working now so I'm backing up each step, no matter...


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.

If you are pleased with this response, please consider awarding the coveted 4 thumbs up to this response. Thank you

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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.

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There are several ways to do this, depending on how your network is configured.

Generally, if you have only one router - you connect the network jack of your cable modem or DSL modem to the WAN ("wide area network" or "internet") jack of the router with a CAT 5 network cable or jumper. Each computer's network jack would be connected to one of the router's (4) LAN ("local area network" or "home network") jacks labeled 1, 2, 3, & 4.

steve_con_12.jpg
In the picture above, the left most jack (WAN) of the router connects to the cable or DSL modem. The "LAN" jacks labeled "1, 2, 3 & 4" connect to each computer's network jack in your home.

The above would change if you are simply adding this router to extend an existing network. You'd likely be using this router as a switch, and leaving the routing duties to the main router. Over simplified, all the CAT 5 network cables would be connected to the 4 LAN jacks. There would be no connection to the router's WAN jack because the output of the first router provides only private IP addresses used in YOUR location. The internet IP address from your ISP is used only at the first router so that your entire home has the single IP address. The WAN jack is for internet addresses only - and the LAN jacks are for local / private addresses in your home only.

Have a look at the LinkSys web site for help configuring your particular model router, or reply with the model and version here.

I hope this helps & good luck. Please rate my reply - thanks!

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If the walls in your house are made of lathe and plaster or concrete block, then the performance of WiFi through all the walls in your house will be very bad. The signal that you are receiving from your neighbor's modem is probably only going through two walls (the outside wall of their house and the outside wall of your house), while the signal from your modem is probably going through at least 4 or 5 walls.
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holygrass_7.jpg

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Redneck Geek

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