--- product_id: 163149025 title: "Networx ISDN BRI Loopback Tester - RJ45 S/T Interface (Pins 3-4 and 5-6) - Diagnostics for Legacy ISDN Circuits" brand: "networx" price: "52.56 DT" currency: TND in_stock: true category: "Networx" url: https://www.desertcart.tn/products/163149025-networx-isdn-bri-loopback-tester-rj45-s-t-interface-pins store_origin: TN region: Tunisia --- # Compact pocket-sized design ISDN BRI specialized loopback Gold-plated contacts for accuracy Networx ISDN BRI Loopback Tester - RJ45 S/T Interface (Pins 3-4 and 5-6) - Diagnostics for Legacy ISDN Circuits **Brand:** networx **Price:** 52.56 DT **Availability:** โœ… In Stock ## Summary > ๐Ÿ”Œ Keep your legacy ISDN circuits flawless โ€” test like a pro, anytime, anywhere! ## Quick Answers - **What is this?** Networx ISDN BRI Loopback Tester - RJ45 S/T Interface (Pins 3-4 and 5-6) - Diagnostics for Legacy ISDN Circuits by networx - **How much does it cost?** 52.56 DT with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/163149025-networx-isdn-bri-loopback-tester-rj45-s-t-interface-pins) ## 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 - โ€ข **Pocket-Sized Powerhouse:** Compact and durable design fits effortlessly in your toolkit, ready for on-the-go troubleshooting. - โ€ข **Precision ISDN Diagnostics:** Engineered exclusively for ISDN Basic Rate Interface (2B+D) to ensure flawless legacy circuit testing. - โ€ข **Lifetime Warranty Assurance:** Backed by Networxโ€™s lifetime warranty, ensuring your investment is protected for the long haul. - โ€ข **Reliable Signal Transmission:** Gold-plated contacts guarantee consistent, interference-free testing results every time. - โ€ข **Seamless S/T Interface Loopback:** Loops pins 3-4 and 5-6 to verify circuit integrity on BRI PBX systems with pinpoint accuracy. ## Overview The Networx ISDN BRI Loopback Tester is a specialized diagnostic tool designed exclusively for ISDN Basic Rate Interface (2B+D) circuits. It loops the S/T interface pairs (pins 3-4 and 5-6) to verify circuit integrity on legacy ISDN deployments and BRI PBX systems. Featuring a compact, pocket-sized design with gold-plated contacts for reliable signal transmission, this tester is backed by a lifetime warranty, making it an essential tool for professionals maintaining legacy ISDN networks. ## Description Specialized Diagnostics for ISDN Basic Rate. The Networx ISDN BRI Loopback Tester is designed specifically for the ISDN Basic Rate Interface (2B+D). This specialized adapter loops the S/T interface pairs (Pins 3-6 and 4-5) to verify circuit integrity on legacy ISDN deployments. (Warning: This tool is strictly for ISDN BRI circuits and will NOT function on T1, E1, J1, PRI, or Ethernet lines). ## Features - SPECIALIZED ISDN DIAGNOSTICS: Designed specifically for the ISDN Basic Rate Interface (2B+D). NOT compatible with Ethernet, T1, E1, J1, or PRI circuits - S/T INTERFACE LOOP: Loops the S/T interface pairs (Pins 3-4 and 5-6) to verify circuit integrity on legacy ISDN deployments and BRI-interface PBX systems - POCKET SIZED DESIGN: A compact, durable diagnostic tool that fits easily in a technician's pocket for convenient portability and storage - GOLD PLATED CONTACTS: Ensures reliable signal transmission for accurate testing and long-lasting performance - RJ45 CONNECTOR INTERFACE: Features standard RJ45 connector for quick and easy connection to ISDN BRI S/T interface equipment and circuits ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00E4OKGRK | | Best Sellers Rank | #768,853 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #1,344 in Network & Cable Testers | | Brand | Networx | | Brand Name | Networx | | Cable Type | Loopback Tester | | Color | Blue | | Compatible Devices | PC | | Connectivity Technology | Ethernet | | Connector Type | RJ45 | | Global Trade Identification Number | 00845425016577 | | Indoor Outdoor Usage | Indoor, Outdoor | | Item Shape | Round | | Item Weight | 0.01 Kilograms | | Manufacturer | Networxยฎ | | Number of Items | 1 | | Number of Pins | 8 | | Other Special Features of the Product | Gold Plated Contacts, Compact Design, Lifetime Warranty | | Recommended Uses For Product | Professional and advanced home use for testing and troubleshooting ISDN (BRI) connections, checking for broken or shorted wires, and testing wall to switch connections Recommended Uses For Product Professional and advanced home use for testing and troubleshooting ISDN (BRI) connections, checking for broken or shorted wires, and testing wall to switch connections See more | | Special Feature | Gold Plated Contacts, Compact Design, Lifetime Warranty | | Specification Met | Isdn Basic Rate Interface (2b+d), S/T Interface | | UPC | 845425016577 | | Unit Count | 1.0 Count | ## Product Details - **Brand:** Networx - **Cable Type:** Loopback Tester - **Compatible Devices:** PC - **Connector Type:** RJ45 - **Special Feature:** Gold Plated Contacts, Compact Design, Lifetime Warranty ## Images ![Networx ISDN BRI Loopback Tester - RJ45 S/T Interface (Pins 3-4 and 5-6) - Diagnostics for Legacy ISDN Circuits - Image 1](https://m.media-amazon.com/images/I/61L-V49tbKL.jpg) --- ## Why Shop on Desertcart? - ๐Ÿ›’ **Trusted by 1.3+ Million Shoppers** โ€” Serving international shoppers since 2016 - ๐ŸŒ **Shop Globally** โ€” Access 737+ million products across 21 categories - ๐Ÿ’ฐ **No Hidden Fees** โ€” All customs, duties, and taxes included in the price - ๐Ÿ”„ **15-Day Free Returns** โ€” Hassle-free returns (30 days for PRO members) - ๐Ÿ”’ **Secure Payments** โ€” Trusted payment options with buyer protection - โญ **TrustPilot Rated 4.5/5** โ€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.tn/products/163149025-networx-isdn-bri-loopback-tester-rj45-s-t-interface-pins](https://www.desertcart.tn/products/163149025-networx-isdn-bri-loopback-tester-rj45-s-t-interface-pins) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-05-09*