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RJ-45 8P8C Reverse Inline Coupler - Beige
In Stock This item should ship today (11/27/2015) if ordered within 13 hours 47 minutes

0.17 lbs

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  • 0-3lbs- $4.99

RJ-45 8P8C Reverse Inline Coupler - Beige

RJ45 Cat5 Ethernet cable coupler.

Reverse couplers reverse the right to left order of the pins inside the connectors. This coupler has 8 pins for RJ45 connectors.

*Monoprice continually strives to improve its product line to bring our customers the best products available. Therefore, changes may be made to listed specifications without prior notice. Item received may not match photo or specs shown.

4 Reviews

90% of the reviewers recommend this product


Do not use as Cat5e line extender/coupler

  • Crabber50,
  •  Port Ludlow, WA 
  • 5/21/2012 10:48:01 AM

Pros: Good Price
Monoprice service

Cons: Not Cat5e rated, you can pull apart and see that.
Also this is reversed wired for connecting two 100mbs PC's together
Not for extending a Cat5e cable

You are likely (like me) to be looking for a cat5e extender to lengthen a cable or something. These items are special purpose and should not be used for extending normal cables. The are also not cat5e rated. I would avoid these for any purpose. I hope Monoprice gets proper couplers soon.

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  • Anonymous,
  •  Boise, ID 
  • 10/7/2011 10:16:06 AM

It sounds like from this description that this really is an ethernet crossover adapter and does NOT reverse the pins, which would make a true "rollover" cable and is what I am looking for.

FYI: Gigabit-ethernet per standards requires auto-mdix and therefore, you can use an ordinary patch cable.

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Not quite as described

  • ebpDoug,
  •  Calgary, AB 
  • 8/4/2011 10:53:19 AM

Pros: Inexpensive, seem of reasonable quality

Cons: A mixture of reverse and straight through.

The couplers do not do a "full" reverse, but rather reverse as would apply for cables used for Ethernet up to 100mbps (100base-TX), which uses only two pairs. The actual pinout is
1 - 3
2 - 6
3 - 1
4 - 4
5 - 5
6 - 2
7 - 7
8 - 8

This makes them usable to couple two Ethernet patch cables to make a crossover cable for 100mbps Ethernet, but not for gigabit Ethernet. (They aren't anything even remotely constant impedance, but would probably be OK to couple short cables.)

For more info on crossover connections, check Wikipedia for "ethernet crossover cable" (sorry, no link, since I don't know if they are permitted in reviews)

The plastic shells can be easily snapped open and closed, for anyone ambitious enough to cut an splice wires to make a custom coupler.

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Does what it says

  • Mark,
  •  Richmond, CA 
  • 4/20/2011 2:45:53 PM

Pros: Very inexpensive and does the job.

Cons: As noted in the description, this coupler reverses the pin order of the connected RJ-45 cables. Hence a pair of standard cables linked through the coupler becomes a cross-over cable. Alternately, a cross-over and a standard cable linked through the coupler works as a standard cable. Many current generation devices will automatically correct for reversed pin order, but older hardware can't cope. If necessary, you can use a pair of these couplers in your cable run to create a kludgey but functional straight-through cable.

It would be good if Monoprice offered a straight-through coupler along with this one.

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