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🔧 Loop in flawless connectivity—because your network deserves zero downtime.
The Networx T1/E1/PRI Loopback Tester is a compact, plug-and-play diagnostic tool designed for instant verification of T-Carrier circuits including T1, E1, J1, and ISDN PRI lines. It creates a hardware loop on transmit and receive pairs (pins 1-4 and 2-5) to force link status and isolate faults on routers, CSUs, and Smartjacks. Built with durable molded PVC and gold-plated contacts, it requires no batteries or configuration and comes backed by a lifetime warranty, making it an essential, reliable tool for telecom professionals.
| ASIN | B00E4OKJKY |
| Best Sellers Rank | #148,553 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #321 in Network & Cable Testers |
| Brand | Networx |
| Brand Name | Networx |
| Color | Blue |
| Compatible Devices | PC, Laptop, Network Switch |
| Customer Reviews | 4.5 out of 5 stars 94 Reviews |
| Global Trade Identification Number | 00845425016546 |
| Item Dimensions | 3.56 x 3.25 x 0.78 inches |
| Item dimensions L x W x H | 3.56 x 3.25 x 0.78 inches |
| Manufacturer | Networx™ |
| Model | 845425016546 |
| Part Number | LB-T1E1S |
| Power Source | Corded Electric |
| Style | T1 / E1 / PRI Loopback |
| Style Name | T1 / E1 / PRI Loopback |
| UPC | 845425016546 |
S**P
Simple and good insurance all will work fine. Good craftsmanship.
worked flawlessly. I was instructed to build a cord, but didn't want to take a chance. This was cheap insurance it was done right. Keep one in your arsenal.
T**N
So easy and convenient to install.
So easy and convenient to install.
S**O
T1/E1
WORKS AWESOME AND VERY TIME EFFICIENT.
D**H
Work related
This made life so much easier. Dont have to make them anymore and wont lose this one.
P**Z
Works as expected
Plug into router. See loop.. Plug on cable.. see loop.. great tool for testing.
T**G
Very convenient
Very convenient to use.
C**R
Four Stars
outstanding product
S**N
Doesn't work
and it's not heavy enough to use as a paper weight so useless
Trustpilot
2 weeks ago
3 weeks ago