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Your cart is empty.Southwire m400tp professional data cable mapper easy-to-read LCD display with backlight. Port cover protects RJ45 port from dust and debris. Rugged double-molded housing with snap-in remote
Chrisotpher Y
2025-09-07 16:09:28
My co-worker let me borrow it because my cheap one had broke. I liked how compact it was and that it can stay together when not in use. I can also purchase the T120AP probe to trace cables which is also useful.I'm very happy with my purchase.
Cosmicsniper
2025-08-20 15:41:12
The Southwire M400TP has a simple design with one button press and removable remote that stores in the unit, similar to some toning wands. It identifies opens, shorts, splits, miswires (reversed and crossed), short to shield, properly wired cross-over cables, and a voltage warning...a nice add. There is also a toner feature that allows tone on individual conductors, individual pairs, and on all wires simultaniously. Note: a toning wand is NOT included. Excellent instructions are provided. Documents reflect a 2-yr warranty.The brown case has a slightly rubber-like feel and easily fits in the palm of the hand and a tool bag slot. The cable tester's top RJ-45 jack has a dust/rain cap to prevent unwanted objects from entering that area. No expensive button cell batteries needed like some other testers. It ships with two AAA batteries. The screen also has backlighting for those times when you're testing from dark closets or beneath desks.A recommendation for the Southwire team --on a future redesign, possibly recess the mode button so it cannot be accidentally pressed while in the bag, and maybe a small microfiber pouch to cover the plastic screen while in your job bag. Overall, a really nice compact continuity tester with slick features. Don't change other things with this design, its close to perfect.
Brent A. Smith
2025-08-04 18:09:43
Easy to use
Fred A Neudecker
2025-06-27 17:28:03
This unit works very well but it will lock up if you are not careful with the mode button. There seems to be a software issue that is not very tolerant of long button pushes and can cause the unit to lock up in some strange modes. If you briefly press the button (1 sec or less) the unit will come up in mapping mode and work perfectly. If you press the button again (long press) the unit may lock up. When it locks up a battery removal is required to reboot the device. If you follow the instructions to get to the tone mode it will function correctly as long as you are very careful with button presses.For the default cable test function it is best to let the unit auto shutdown and not try to force it off with a long key press.Update 11/15/20: My unit now refuses to function and only blinks the 4 and 8 when turned on. Replacement of batteries does not correct the problem. Asked for a replacement and we’ll see how that goes.
Quade
2025-06-08 15:16:43
It works great when it works, ive had to reset it several times due to issues on the screen, pulling out the little piece on the bottom is a bit sketchy and feels like youre going to break the plastic. Battery life is great, def will have it in my pouch for testing at all times
tom lombardo
2025-05-30 18:34:33
This is an excellent piece of test equipment. I've owned at least four of these. I have to keep buying new ones because the remote test plug falls apart. The plastic case splits and after a while without the case little circuit board gets destroyed. I wish you could buy the remote peace and packs of 5. But until then I'm going to keep buying them because they work pretty damn good.
Cam
2025-05-26 11:50:01
If you need a cable tester this is the one I would recommend as the best bargain. Straight forward design, 100% accurate readings in my experience with it and also built like a brick. I have not been particularly gentle with it and it has barely a mark on it. It also acts as a toner if you need one in a pinch.
ebrake
2025-05-15 13:44:57
I am a new network field technician. My first cable tester was the cheapest tester that is very common on Amazon under many different brands. Each pin lights up one at a time making it impossible to take a single picture of a tested cable. Since it is quite common for help desks to request a photo of a successful cable test, this Southwire meter is much better for this. Attached are two photos of good straight and crossover cables. The included user guide is well-written and understandable.
Tom George
2025-03-17 10:50:07
For the size, this does what bulkier units will do with ease.Perfect for cable testing and locating
Eric
2025-02-21 14:15:51
Produit conforme aux attentes, compact et très pratique!Gros bémol pour la livraison cependant: le produit a été ouvert! 😱
DAVID
2025-02-02 15:42:54
Out of the box worked perfectly but next day I found it was malfunctioning- needed to cycle batteries to correct.Ordered replacement & issue repeated (4 & 8 flash and button does nothing, batteries must be removed to fix).Looking at other manufacturers.
Bc
2025-01-20 13:18:07
Simple and works
Shane
2025-01-12 16:29:46
So at first it worked great and i was extremely happy! The next day it stopped working. I returned it and got a new one and the exact thing happened. So i returned the 2nd one and got a 3rd one and low and behold it happened again!!!! 3 times in a row! Now if you pull out the batteries and put them back in it works normal but then problem happens again later, where the screen goes all funky with numbers and its unusable. Im sorry but i will no longer support Southwire products. I ended up going with another brand.
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