DIY Chatroom Home Improvement Forum

DIY Chatroom Home Improvement Forum (
-   Electrical (
-   -   Cat 5e Network Question (

helpless handyman 07-31-2007 12:59 PM

Cat 5e Network Question
I have a friend that has two data ports, and wants to split them to data and voice. Two pairs for a phone system, and the other two pairs for the data. Which are the pairs used for data? Thanks

SecretSquirrel 07-31-2007 01:05 PM

CAT5/CAT5e require 8 conductors (4 pair).

See this wiring diagram.

helpless handyman 07-31-2007 01:19 PM

Actually, only two pairs are used out of the four pairs on a Cat 5e . I am just trying to find the exact pairs. I beleive they are 1,2,3,6, but just want to make sure.

SecretSquirrel 07-31-2007 01:55 PM


Actually, only two pairs are used out of the four pairs on a Cat 5e
You're right... sorry about that. I always terminate them by the first method.

Try this wiring configuration.

helpless handyman 07-31-2007 02:33 PM

Thanks Secret Squirrel, I found it as well:

I am assuming it will run at 100?

slakker 07-31-2007 02:58 PM

Pin 1,2,3,6 are for ethernet and should work for 100 Mbps, though you may experience some cross talk if the other pairs are used for the phone, especially when you get ring voltage through...

The good thing is that with short runs, etc. you probably won't notice any issues...

Beren 08-01-2007 01:18 PM

Gigabit Ethernet does require all four pairs. It's not recommended to do what you're suggesting, but it's not a safety hazard. It probably won't cause a problem on a short run, but I wouldn't want to have my download interrupted when the phone rings. :thumbup:

Use 7 & 8 if you have to do it this way. Run another line if you can.

All times are GMT -5. The time now is 06:07 AM.

User Alert System provided by Advanced User Tagging (Pro) - vBulletin Mods & Addons Copyright © 2016 DragonByte Technologies Ltd.

Search Engine Friendly URLs by vBSEO 3.6.1