--- product_id: 14213953 title: "Networx Gigabit RJ45 Loopback Tester - 10/100/1000Base-T Network Port Validator - Ethernet Diagnostic Tool for Switches and Server NICs" brand: "networx" price: "155 kr" currency: DKK in_stock: true reviews_count: 9 category: "Networx" url: https://www.desertcart.dk/products/14213953-networx-gigabit-rj45-loopback-tester-10-100-1000base-t-network store_origin: DK region: Denmark --- # Gigabit 1000Base-T support Loops all 4 wire pairs for echo test Gold-plated RJ45 for corrosion-free durability Networx Gigabit RJ45 Loopback Tester - 10/100/1000Base-T Network Port Validator - Ethernet Diagnostic Tool for Switches and Server NICs **Brand:** networx **Price:** 155 kr **Availability:** ✅ In Stock ## Summary > 🔧 Plug in. Test fast. Stay connected like a pro. ## Quick Answers - **What is this?** Networx Gigabit RJ45 Loopback Tester - 10/100/1000Base-T Network Port Validator - Ethernet Diagnostic Tool for Switches and Server NICs by networx - **How much does it cost?** 155 kr with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.dk](https://www.desertcart.dk/products/14213953-networx-gigabit-rj45-loopback-tester-10-100-1000base-t-network) ## Best For - networx enthusiasts ## Why This Product - Trusted networx brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Universal RJ45 Fit:** Engineered to securely connect with all standard RJ45 ports—no adapters needed. - • **Lifetime Peace of Mind:** Backed by Networx’s lifetime warranty—trusted by network pros worldwide. - • **Instant Port Validation:** Verify active network ports and link status in seconds for zero downtime. - • **Rugged & Compact Design:** Durable molded PVC housing fits perfectly in your IT toolkit for daily use. - • **Full Gigabit Compatibility:** Supports modern 1000Base-T and legacy 10/100 Ethernet for future-proof diagnostics. ## Overview The Networx Gigabit RJ45 Loopback Tester is a professional-grade Ethernet diagnostic tool designed to instantly verify network port activity and link status. Supporting full gigabit speeds (1000Base-T) and backward compatible with 10/100 Ethernet, it loops all four wire pairs for accurate echo testing on switches, server NICs, and wall jacks. Its compact, durable design with gold-plated contacts ensures reliable, corrosion-free connections, making it an essential tool for network engineers, sysadmins, and installers. Comes with a lifetime warranty for long-term confidence. ## Description Professional Ethernet Diagnostics. Streamline your network troubleshooting with the Networx Gigabit Loopback Tester. Designed for professional diagnostics, this compact, molded adapter loops all four wire pairs to verify active network ports in seconds. It supports full echo tests and link verification on both modern Gigabit (1000Base-T) interfaces and standard 10/100 Ethernet. Engineered for universal compatibility, it connects seamlessly to any RJ45 port, providing the correct signal return for accurate testing of switches, server NICs, and wall jacks. Review: loopback tester - This loopback tester is efficient at finding faults on any network. Easy to use and durable Review: IMPORTANT TOOL for every network engineer. - It's basic, but it's necessary, and it works VERY well. Can't tell what switchport a wall port goes to? Throw on loopback detection on every port, plug this thing in, BOOM! Port identified! WAY easier than toning out cables! ## Features - PROFESSIONAL NETWORK DIAGNOSTICS: Instantly verifies active network ports and link status. This molded adapter loops all four wire pairs (1-3, 2-6, 4-7, 5-8) to perform echo tests on switches, wall jacks, and NICs. - FULL GIGABIT SUPPORT: Unlike older testers, this unit supports modern 1000Base-T interfaces while maintaining backward compatibility with standard 10/100 Fast Ethernet. - UNIVERSAL COMPATIBILITY: Engineered to fit securely in all standard RJ45 ports. Provides the correct signal return for accurate diagnostics on unmanaged/managed switches and server hardware. - COMPACT & DURABLE: Built for the IT tool bag. Features a solid molded PVC housing and gold-plated contacts to ensure a corrosion-free connection for years of daily use. - LIFETIME WARRANTY: Backed by the Networx Lifetime Warranty. Ideal for Network Engineers, Sysadmins, and Installers. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00E4OKGDE | | Best Sellers Rank | #61,627 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #121 in Network & Cable Testers | | Brand | Networx | | Color | Blue | | Compatible Devices | PC | | Connector Type | RJ45 | | Customer Reviews | 4.3 out of 5 stars 337 Reviews | | Finish | Rj45 | | Finish Type | Rj45 | | Global Trade Identification Number | 00845425016560 | | Item Dimensions | 3.56 x 3.25 x 0.78 inches | | Item Weight | 27.22 g | | Item dimensions L x W x H | 3.56 x 3.25 x 0.78 inches | | Manufacturer | Networx™ | | Mfr Part Number | LB-GB45S | | Model Number | LB-GB45S | | Number of Items | 1 | | Number of Ports | 1 | | Package Quantity | 1 | | Power Plug Type | No Plug | | UPC | 845425016560 | | Unit Count | 1 Count | | Warranty Type | Lifetime | ## Product Details - **Brand:** Networx - **Color:** Blue - **Compatible Devices:** PC - **Connector Type:** RJ45 - **Item dimensions L x W x H:** 3.56 x 3.25 x 0.78 inches ## Images ![Networx Gigabit RJ45 Loopback Tester - 10/100/1000Base-T Network Port Validator - Ethernet Diagnostic Tool for Switches and Server NICs - Image 1](https://m.media-amazon.com/images/I/716oy2Nyo5L.jpg) ![Networx Gigabit RJ45 Loopback Tester - 10/100/1000Base-T Network Port Validator - Ethernet Diagnostic Tool for Switches and Server NICs - Image 2](https://m.media-amazon.com/images/I/71vWhA4xaqL.jpg) ![Networx Gigabit RJ45 Loopback Tester - 10/100/1000Base-T Network Port Validator - Ethernet Diagnostic Tool for Switches and Server NICs - Image 3](https://m.media-amazon.com/images/I/61XkEDwYQ1L.jpg) ![Networx Gigabit RJ45 Loopback Tester - 10/100/1000Base-T Network Port Validator - Ethernet Diagnostic Tool for Switches and Server NICs - Image 4](https://m.media-amazon.com/images/I/812J632Xh7L.jpg) ![Networx Gigabit RJ45 Loopback Tester - 10/100/1000Base-T Network Port Validator - Ethernet Diagnostic Tool for Switches and Server NICs - Image 5](https://m.media-amazon.com/images/I/61VutD5kpYL.jpg) ## Available Options This product comes in different **Style** options. ## Questions & Answers **Q: Is there any danger of using these to check ports in a power-over-ethernet (poe) switch?** A: Only if you have done some crazy hardware alterations or a homicidal arch nemesis. **Q: Will this work for 10Gbase-T connections over cat6a?** A: It should. Cat6 should pass lower data rates just fine. You'll just get link lights or not. **Q: Will this test if the eithernet port on my camera is working?** A: It will be able to test Ethernet connection if your device has a network card that transmit the signal. **Q: Does this work on non-gigabit connections as well?** A: Yes, this adapter is backwards compatible with non-gigabit connections. ## Customer Reviews ### ⭐⭐⭐⭐⭐ loopback tester *by A***D on July 28, 2026* This loopback tester is efficient at finding faults on any network. Easy to use and durable ### ⭐⭐⭐⭐⭐ IMPORTANT TOOL for every network engineer. *by J***) on January 17, 2024* It's basic, but it's necessary, and it works VERY well. Can't tell what switchport a wall port goes to? Throw on loopback detection on every port, plug this thing in, BOOM! Port identified! WAY easier than toning out cables! ### ⭐⭐⭐⭐⭐ Does exactly what it claims. *by J***R on January 9, 2024* Nice network diagnostic tool. ## Frequently Bought Together - Networx® CAT6 Gigabit RJ45 Loopback Tester - LC/UPC Fiber Optic Circuitors Connector SM & MM Loopback Adapter Interface Signal Loop (LC/UPC SM-9/125) --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.dk/products/14213953-networx-gigabit-rj45-loopback-tester-10-100-1000base-t-network](https://www.desertcart.dk/products/14213953-networx-gigabit-rj45-loopback-tester-10-100-1000base-t-network) --- *Product available on Desertcart Denmark* *Store origin: DK* *Last updated: 2026-09-26*