How to make an RJ-31X cable

Jul 06, 2006 1 Replies

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peasngrits 20 years ago

-- Hello, I was wondering if anyone could point me to a guide on how to make an RJ-31X cable using CAT5. I just got 2 Quocom AT1 dialers in an office liquidation and was trying to see if I could configure them. I need the cable to go from the control port on the dialer to a DB25 modular adaptor(female) connected to my serial port (by a DB25 male to DB9 female converter). I was thinking that straight through cable should work fine. Can someone confirm that please. If so, my problem may be with my modular adaptor wiring.

Thanks

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Dmitri(Cabling-Design.com 20 years ago

It does not look like you actually need an RJ31X. The pinout for RJ31X is here:

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but I think you are confusing it with just a 8-pin 8-conductor jack of the control port that has either proprietary pinout or maybe EIA-561 like many of them do. RJ31X has a contact that opens couple of normally closed contacts between pins, so I really doubt you'd see anything like that in a control port jack.

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