How To Make Crossed E1/T1 Cable

A crossed cable to be used between 2 PABX or to make a loop back (for lab environment)

End A Cable End B
Pin Name Wire Colour Pin Name
1 RX A orange-white 4 TX A
2 RX A orange 5 TX A
3 RX B green-white 7 TX B
4 TX A blue 1 RX A
5 TX A blue-white 2 RX A
6 RX B green 8 TX B
7 TX B brown-white 3 RX B
8 TX B brown 6 RX B
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2 Responses to How To Make Crossed E1/T1 Cable

  1. Houssam,

    you can also use 1-2—–4-5 on one side and on the other side user 4-5—–1-2…you don’t have to use any other pair..
    just another way.. 🙂

    thanks

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