RJ-11 and RJ-45 Modular Plug Tester
    Product # 8138
    RJ-11 and RJ-45 Modular Plug Tester
    Product # 8138
    $7.43
    Quantity:
    In Stock This item should ship tomorrow (2/8/2016) if ordered within 19 hours 54 minutes

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    RJ-11 and RJ-45 Modular Plug Tester

    This Monoprice RJ11/RJ45 tester is a simple, yet powerful, tool that helps troubleshoot network and telephone cables for broken wires and crossed connections.

    The tester consists of a main Master unit and a detachable Remote unit, each of which have an RJ11 and an RJ45 jack. The unit is powered with a 9-volt battery (not included) and can be stored in the included, zippered, synthetic leather case.

    The Master and Remote unit each have a series of 9 LEDs that show the status of each line on the attached cable. The tester supports both a fast automatic and a slow automatic mode.

    The following operating instructions supercede the instructions contained in the enclosed operator's manual.

    To test a cable:

    1. Insert one end in the appropriate jack on the Master unit and the other in the same type jack on the Remote unit.

      IMPORTANT! DO NOT CONNECT TO A CABLE THAT IS PLUGGED IN TO A LIVE CIRCUIT AS THIS MAY CAUSE DAMAGE TO THE TESTER OR OTHER EQUIPMENT ON THE CIRCUIT!

    2. Move the tester power switch to the "On" or "S" position. For best results, use the Slow Automatic mode (S position) to perform the test, as this gives time to watch the light sequence and ensure that the same LEDs illuminate on the Master and Remote simultaneously.

    3. Watch the LEDS on both the Master and Remote units. Under normal conditions, using a straight-through RJ45 cable in good condition, the LEDs will simultaneously illuminate in the sequence 1-2-3-4-5-6-7-8-G on both the Master and Remote units.

    4. A faulty or miswired connection will produce a different result, as follows:

      1. If there a wire is broken or otherwise not connected the LED on the Master unit will illuminate, but no LED will illuminate on the Remote unit.

      2. If a wire is crossed, different LEDs will illuminate on the Master and Remote units. For example, if the 3rd LED on the Master unit and the 5th LED on the Remote unit both illuminate then the wire is crossed between pin 3 on the Master side and pin 5 on the Remote side.

      3. If there is a short circuit between two or more wires, no LEDs will illuminate on either the Master or Remote unit.

    Note that when testing RJ11 or RJ12 cables with a 6P6C connection, only the LEDs 1-6 will illuminate. If using a 4P4C connection, only the LEDs 2-5 will illuminate.



    This product requires a 9 volt battery, which is not included!



    Support Files:

    Package Contents:

    • 1x Cable Tester Master unit
    • 1x Cable Tester Remote unit (attached to Master)
    • 1x Synthetic leather, zippered carrying case

    88 Reviews

    92.27% of the reviewers recommend this product

    ADD YOUR REVIEW

    Had to get a replacement

    • Chuck,
    •  Hudson, WI 
    • 12/9/2015 9:25:29 PM

    Pros: Awesome price replacement works great

    Cons: First unit was defective, but replacement arrived at light speed

    You can't beat the price of this unit, so I didn't complain when I had to send back the first one. Lights number 6 and 7 on the remote would not light up, even when testing a store bought ethernet cable. So I told Monoprice about it and within a few days I had my fully operational replacement. They didn't even want the old one back. Anyone want a slightly defective RJ-45/RJ-11 Modular Plug Tester?

    Was this review helpful to you?

    Ok, but!!

    • zoom38,
    •  Ridge, NY 
    • 11/10/2015 3:51:28 AM

    Pros: Easy to use and cheap.

    Cons: Didn't recognize crossed connections.

    The jury is still out on this one. I used it for only one connection so far which it failed in my mind. The unit advised I had a good connection but I still couldn't get my connection to work. Looking deeper into it, I reversed the wires on one end. The unit should have failed the connection but it didn't.


    by Monoprice Administrator
    Hello zoom38,

    Thank you for your review and my apologies regarding the issues you have experienced with PID 8138. It seems as though you have a faulty unit. If a wire is crossed it should have different LED's light up. As an example, if the 3rd LED on the Master unit and the 5th LED on the Remote unit both illuminate then the wire is crossed between pin 3 on the Master side and pin 5 on the Remote side. As for it reading that you had a good connection and then the connection did not work, may I ask was it wired to the correct wiring standard that your devices that you are connecting support?

    Regards,
    Mark P.
    Tech Support Associate

    Was this review helpful to you?

    Great while it works

    • plandcl,
    •  Weston, ID 
    • 11/2/2015 1:22:25 PM

    Pros: Worked great the first year.

    Cons: Not reliable, quit working.

    It worked great the first year. Now the power light comes on and stays on and wont cycle. I tried a new battery but still the same problem.

    Was this review helpful to you?

    Love it...get 2

    • Doug Fl.,
    •  Dunedin, Fl 
    • 9/7/2015 2:52:44 PM

    Pros: This thing is the best ever... But get 2 of them,,1 for you and 1to hide from your friends...

    Cons: "OOOOO"

    Love this tester... for the price get 2...

    Was this review helpful to you?
    • Anonymous,
    •  San Diego, CA 
    • 8/28/2015 4:13:40 PM

    Worked great. See my comments also on PID310,PID7035,PID7245. Will be purchasing more tools from this site in the future.

    Nervous about how it performs in the future, but so far very pleased with results

    Was this review helpful to you?
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