Log In

Come Join Us!

Are you a
Computer / IT professional?
Join Tek-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Tek-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

DTX question (Ethernet wire testing and Split Pair)

DTX question (Ethernet wire testing and Split Pair)

DTX question (Ethernet wire testing and Split Pair)

i had dtx done on a 4-wire Ethernet cable and received a split pair error on DTX-1800 unit....; not sure if this definitely means that connector is miswired or if the wire harness too degraded and should be replaced.

Argument about harness not being miswired (as i was given by one of the senior guys) is that mis-pinning will create a crossed wire or connection situation resulting in incorrect data tx/rx. In a twist pair configuration each of the wire pairs are matched for a Tx/Rx or High/Low transmission line and due to cable being pretty long (100 feet or so) cable has degraded enough i.e. the twist applied during its manufacturing has become less effective toward frequency separation or out of tolerance for the length of the installed run that allows.(not sure how accurate this statement is)

i attached few pictures of the test results to give better detail

RE: DTX question (Ethernet wire testing and Split Pair)

If the DTX says there is a split pair, then the wiring is wrong. No other degradation of the cable will produce a split pair reading. (I'm assuming that you're using the word "harness" to mean the "cable" and not something else.) Note that the suggestion that a degraded, but correctly terminated, cable with poor frequency response or high pair crosstalk can create a split pair reading on the DTX is not correct.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Tek-Tips Forums free from inappropriate posts.
The Tek-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Tek-Tips forums is a member-only feature.

Click Here to join Tek-Tips and talk with other members! Already a Member? Login

Close Box

Join Tek-Tips® Today!

Join your peers on the Internet's largest technical computer professional community.
It's easy to join and it's free.

Here's Why Members Love Tek-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close