Help with 8- to 4-pin phone conversion for phone line

[JuanTabonia]

Hi everyone,
I am having some issues with my phone system trying to set up my DSL Modem.
My home has a built-in telephone/network/cable switching box and all of the phone lines that lead to the rooms have 8-pin (RJ-45) connectors plugging into the box.

What pin order do I need for a cable that goes from 8-pin to 4-pin (RJ45 to RJ11) in order to plug it into my cable modem?

I thought I did it correctly once but then I moved stuff around and now my homemade cable doesn't work anymore. Grrr.

The wire order in the 8-pin is
Green/White
Green
Orange/White
Blue
Blue/White
Orange
Brown/White
Brown

I thought all that mattered was the 2 middle pins so I made an RJ 11 connector with the 2 middle pins being Blue, Blue/White. I also tried the flip of that to no avail.

Your help is much appreciated. I'm beginning to think the cable itself is bad or something, because this shouldn't be so difficult. What really gets me is that I swear it worked once before.

 

[JuanTabonia]

Did some more digging on the internet and found out that a regular phone cord with RJ11's would fit into the RJ45 socket. I plugged it in and voila, it worked!

Now I could make one end a RJ45 connector but if it works I'm not touching it anymore!

Text

 

[ScottMac]

For future reference, according to your pair order (the color order you listed above ... which is "EIA/TIA 568A" specification):

Line one is on the blue pair
Line two is on the orange pair
Line three is on the green pair
Line four is on the brown pair

SO, if you had two existing phone lines, than added ISDN, it would probably be delivered on the green pair (pair three).

RJ11 or RJ14 into an RJ45 is no problem.

Good Luck

Scott