Telecom Technical How to make an RJ-31X cable

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How to make an RJ-31X cable peasngrits 07-06-06
Posted by peasngrits on July 6, 2006, 12:32 pm
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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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Posted by Dmitri(Cabling-Design.com on July 19, 2006, 10:17 pm
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peasngrits wrote:

> 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.

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

http://www.cabling-design.com/references/pinouts/RJ31x.shtml

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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Best Regards,
Dmitri Abaimov, RCDD
http://www.cabling-design.com/
Home Cabling Guide, Cabling Forum, color codes, pinouts and other useful
resources for premises cabling users and pros



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