Kevin Nanns
Region: US
Thursday 11 September 2025 13:08:46 GMT
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EmmetB :
loopback on fiber are super dangerous if you dont take into account tx and rx power you can burn the port in split of a second
2025-09-11 13:41:54
114
Gaz :
…only if network loop is managed…
2025-09-11 13:20:00
9
Fiber Flipper :
Ahh yes. I don’t have copper ones but the ragged old fiber patch cable in my bag is ripped down the middle for just the purpose of creating a loop back.
2025-09-12 00:23:13
2
GentleHeart (Ron) :
this is ancient tech. I've had an RJ 45 version for decades
2025-09-11 23:00:30
1
ITLUVR911 :
What’s a good place to buy these? Asking for me since I’ve been patching a lot at my new job
2025-09-20 15:15:08
0
deadzone :
Loopbacks allowed us to take the fight to ATT when they used to tell us our T1 was ok when we knew the smart jack was clearly not working 😂😂😂
2025-09-11 13:27:25
1
one68point7 :
excellent, may I also recommend a network tone tester for finding your cable in a haystack of cables👍
2025-09-11 16:37:39
1
darkmesh_ :
just dont use them on long range SFP's, it will be a quick way to burn it out.
2025-09-13 06:14:39
2
Arkoptics :
We can also make mtp mpo loopback with attenuation level from 0dB to 30dB
2025-09-23 07:29:50
1
Laurens Zalm :
yes but we are transitioning to Bi-directoinal Fiber links... so 1490 for one direction and 1310 for the other.. so.. meh...
2025-09-11 13:18:10
2
Flamacue :
well can’t AI find the issue? lolol
2025-09-11 14:39:07
1
S H E H ز A D 🥀 :
what windows laptop do you use ?
2025-09-11 14:00:10
3
Steve5161 :
network port test, just plug in to two port. same test and you check two ports. (hehehe....hehe)
2025-09-11 16:33:02
6
Echo Whisky 🇬🇧🏴 :
Saved me a bunch of times. Use fibre loop backs on a regular basis to prove the patching/splicing is correct.
2025-09-11 16:25:22
4
DMac :
these are a handy little Gadget to have when you're dealing with a remote administrator who is a bit overzealous and trying to say that your cabling is wrong your cabling is not working. when the whole time they didn't turn on the port!
2025-09-26 04:08:29
1
underArmor :
stp and bpdu guard
2025-09-11 22:59:35
0
مدري . الأصدقاء :
STP will disable it
2025-09-11 21:16:11
0
Kevin Pierce :
I have loopback transceivers as well as loopback plugs. Sometimes it is necessary to also rule out actual switch/router SFP/QSFP ports issues. Sometimes in harsh environments, dust and moisture happens and sometimes people just start plugging in transceivers to ports that are really not suitable to be used.
2025-09-13 03:20:27
1
TigerStorms :
What kind of pads are on those loop back testers?
2025-10-31 20:20:15
0
LuminixAI :
awesome 👌
2025-10-29 00:49:09
0
ponte :
I just grab an LC to LC patchable and loop it . don't need a fancy smaller one got tons of these in the car.
2025-11-11 18:23:36
0
Miki-Fiber :
Cool
2025-11-07 19:31:57
0
76Atheer :
We need to use an attenuator in this case; otherwise, the port could be damaged..😊
2025-11-04 18:15:36
0
Mike :
true
2025-10-30 12:24:25
0
KC :
can it use for printer ??
2025-09-11 17:33:45
0
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