Network Cable not connecting computers to router 1

[corper]

I have two computers I wish to share a DSL line between. I had one wire which came with the DSL modem. I bought a 100 foot CAT5e cable and RJ45 connectors to make my own network cable what ever length I need. I made a 3 foot cable and used the rest to make another. I used the pre-made wire to connect the modem to the router and both of my home-made wires to connect the router to the computers. I got the short one to work, but the other would not let me connect to the router. When I use the CD that came with the router, I'm told the computer is not connected to the router. I tried pinging the router, and was told I couldn't. Also, my computer says that I'm connected to an LAN. I watched the prgoress; my computer kept sending info, but never recieved any.
I moved my computers close to eachother, connected them to the router using the short cables and connected the modem to the router using my long cable. This seems to work fine. I'm using this setup right now. The wire also works when connecting either computer directly to the modem without the router.
Basically, the network cable will connect computer to modem or router to modem, but not computer to router. I don't think the wire is too long(i believe 300 meters is the max limit). If anyone can help, I would really appreciate it, this has been driving me crazy for a whole week now, thanks.

 

[TheOldMan346]

It sounds like you made the short one correctly as a "straight-through" cable but may have crossed pairs in the long one. A sort of "cross-over" cable but maybe not wired exactly correct.

Router/switch/hub to computer uses a "straight-through" or patch cable. It should be crimped the same at both ends.

Computer to computer or router/switch/hub to router/switch/hub requires a "cross-over" cable. The transmit and receive pairs are swapped. See the diagram here:

http://www.bbdsoft.com/rj45.html

As for the length, 100 meters or about 340 feet is the maximum.

Hope that helps.
The Old Man

 

[jimbopalmer]

I think that while most Cable modem to router connections are straight through, most DSL to router connections are cross over, if every cable works PC to Modem, then perhaps the Modem to Router cable needs to be crossover. I tried to remain child-like, all I acheived was childish.

 

[Guest_imported]

I suppose your DSL modem is external. What you need to do is buy one more network adaptor to establish a network connection. As far as i know you cannot connect the cable to router and the router to other computers.

Because the host computer will need its own network adaptor to connect to the DSL cable. To create a home network connection you will need another external network adaptor
(External adaptors are manufactured so that they are easily connected to your USB port)

So this what you should do:

1 - You dont touch your DSL cable connection , leave it as it was when you used it for one computer.

2 - Buy a second external network adaptor and connect to your USB on the host computer.

3 - Connect your new network adaptor to the network hub(router).

4 - Connect your other computer to the network hub.

 

[TheOldMan346]

Check this out,

Actually, that is exactly what you are supposed to do.

Connect the DSL/Cable modem to the router and the computers are connected to the switch portion of the router if it is equipped that way.

What you describe is Internet Connection Sharing. This is what you would do if you do not have a router.

The Old Man

 

[mikey62]

Troubleshooting is half the fun!. Check the simple stuff first such as the cable connections. The old man is right. How old is old?...I remember....token ring and scary sna stuff.

 

[corper]

Thanks a lot guys for trying to help. My connection is working fine. i bought a short(3ft) network cable, cut off the ends about 6 or 7 inches in, stripped each wire, then stripped each on my long cord. i went on to attach each of the 8 wires in the connection from the 3ft cable to the 8 wires in the long cable. After that, it worked great. I hope that made sense. i still stand by my original connections though, in spote of the overwelming evidence that they were the cause of the trouble.
thanks again for all the advice!