IBM Shielded Type 1 Cable for ethernet FREE cabling and networking Helpdesk
 Question by Adam De Paolis posted 23 Feb 2001
 IBM Shielded Type 1 Cable for ethernet
I want to connect a computer with an ethernet card to an ethernet network with an IBM Shielded Type 1 Cable which consists of 4 wires (2 pairs) normally used on token ring networks.

This is the type of cable which uses the IBM UDC connectors.

The reason is the cable is in place already and I just want to connect 1 or 2 computers.

I would like to know if this is possible.
 Answer by Dmitri Abaimov posted 01 Mar 2001
Dear Adam,

You can take this approach: remove IBM jacks from both ends of a cable run. Before doing that, check whether the installers left any slack for re-termination. If not, pick another cable.
Then terminate just regular shielded RJ45 keystone (or any other type) jack with 110-type impact tool so that pair #1 goes to pins 3 and 6 and pair #2 goes to pins 1 and 2. Thus you'll serve the pins needed for Ethernet connection.
Pay attention when terminating the RJ45 jacks. IBM type 1 uses 22 AWG wires, so you usually cannot re-use the jack, made for 24 AWG, if you made a mistake.
You would have to think about a way to mount the jacks at both ends. Sorry, I cannot be more helpful without knowing what type of faceplate/gang box at the work space and patch panel or jack panel at the telecom closet side.
Dmitri Abaimov, RCDD

Click here to see the expert's profile
Back to the current page of questions | Back to all the questions
Back to HELPDESK | Ask your question
Residential Cabling Guide

Home Cabling Guide

Finally, an instantly downloadable book that saves you thousands in home improvement dollars! Enjoy living in 21st century technology-advanced home while increasing its selling value and competitive advantage on the real estate market. Whether your cabling is for home office or high-tech leisure, you can wire your home yourself or learn "wirish" to speak with your cabling contractors in their language!

Learn more ...