How to make a T1 Crossover cable

In setting up my home lab, one thing that I needed to do was communicate between my routers using the T1 WICs.  For the physical cable connection it is necessary to use a T1 Crossover cable.  This is really simple to construct.  Using standard twisted pair cable and RJ45 ends, make the following connections: pin 1 to 4, 2 to 5, 4 to 1 and 5 to 2.  Below is a diagram:


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5 Responses

  1. Eric Worthington says:

    Thank you, studying for my CCNA and found this usefull. Lucky enough to have some old routers in our lab at work and needed to join the T1 WIC ports, this did the trick!

  2. Bill says:

    Glad I was able to help out! Over time I’ll be adding more notes and posts, I’ve just been busy with a Cisco VoIP implementation (plan on seeing more about that soon).

  3. Starfox says:

    Thanks again Bill,

  4. Bill says:

    Glad I was able to help. Keep an eye out for updates to the site soon.

  5. wankamgoot says:

    Thank you very much

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