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🔧 Master your network with the ultimate T-Carrier loopback tester—because downtime is so last decade.
The Networx T1/E1/PRI Loopback Tester is a professional-grade diagnostic tool designed for instant verification of T-Carrier circuits including T1, E1, J1, and ISDN PRI lines. Featuring a universal hardware loop on transmit and receive pairs (pins 1-4 and 2-5), it enables technicians to quickly isolate hardware faults on routers, CSUs, and Smartjacks. Its compact, durable PVC design with gold-plated contacts ensures reliable field use, all backed by a lifetime warranty for long-term confidence.
| ASIN | B00E4OKJKY |
| Best Sellers Rank | #153,454 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #307 in Network & Cable Testers |
| Brand | Networx |
| Brand Name | Networx |
| Color | Blue |
| Compatible Devices | PC, Laptop, Network Switch |
| Customer Reviews | 4.4 out of 5 stars 59 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™ |
| Measurement Type | Electrical Measurement Device |
| Model | 845425016546 |
| Number of Items | 1 |
| Number of Packs | 1 |
| Part Number | LB-T1E1S |
| Power Source | Corded Electric |
| Specification Met | [Est] Networx Brand Reputation & Product Purpose |
| Style | T1 / E1 / PRI Loopback |
| Style Name | T1 / E1 / PRI Loopback |
| UPC | 845425016546 |
D**H
Work related
This made life so much easier. Dont have to make them anymore and wont lose this one.
S**O
T1/E1
WORKS AWESOME AND VERY TIME EFFICIENT.
P**Z
Works as expected
Plug into router. See loop.. Plug on cable.. see loop.. great tool for testing.
C**S
Telcom use
Love them works perfect
J**N
Can't be without
I buy these for all of the techs in my office. Its much nicer (and better looking) than making separate male/female plugs.
S**N
Doesn't work
and it's not heavy enough to use as a paper weight so useless
R**K
Five Stars
Work out great
J**A
it doesn'' T work
It does not work, it never worked
Trustpilot
1 day ago
3 weeks ago