--- 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: "S/.49" currency: PEN in_stock: true category: "Networx®" url: https://www.desertcart.pe/products/163149025-networx-isdn-bri-loopback-tester-rj45-s-t-interface-pins store_origin: PE region: Peru --- # Gold plated RJ45 contacts Compact pocket-sized design ISDN BRI (2B+D) specialized loopback Networx ISDN BRI Loopback Tester - RJ45 S/T Interface (Pins 3-4 and 5-6) - Diagnostics for Legacy ISDN Circuits **Brand:** networx **Price:** S/.49 **Availability:** ✅ In Stock ## Summary > 🔌 Keep your legacy ISDN circuits flawless—because vintage tech deserves VIP treatment! ## 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?** S/.49 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pe](https://www.desertcart.pe/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 - • **Plug & Test Simplicity:** Standard RJ45 connector enables instant connection to ISDN S/T interfaces—no adapters needed. - • **Legacy Network Assurance:** Confidently verify and maintain your ISDN BRI circuits, avoiding costly downtime in critical telecom setups. - • **Pocket-Ready Portability:** Ultra-compact and lightweight design fits seamlessly in your toolkit or pocket for on-the-go troubleshooting. - • **Reliable Signal Integrity:** Gold plated RJ45 contacts guarantee consistent, accurate loopback testing with minimal signal loss. - • **Precision ISDN Diagnostics:** Engineered exclusively for ISDN Basic Rate Interface (2B+D) to ensure flawless legacy circuit testing. ## Overview The Networx ISDN BRI Loopback Tester is a precision diagnostic tool designed exclusively for ISDN Basic Rate Interface (2B+D) circuits. Featuring a compact, pocket-sized form factor and gold plated RJ45 contacts, it provides reliable loopback testing of S/T interface pairs (pins 3-4 and 5-6) to verify circuit integrity on legacy ISDN deployments. Ideal for professional technicians and advanced users, this tester ensures quick, accurate troubleshooting of ISDN BRI lines, helping maintain critical telecom infrastructure with ease. ## 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 | #602,749 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #1,109 in Network & Cable Testers | | 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 | Networx® | | 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 | | 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) ![Networx ISDN BRI Loopback Tester - RJ45 S/T Interface (Pins 3-4 and 5-6) - Diagnostics for Legacy ISDN Circuits - Image 2](https://m.media-amazon.com/images/I/71HNQEcT3nL.jpg) ![Networx ISDN BRI Loopback Tester - RJ45 S/T Interface (Pins 3-4 and 5-6) - Diagnostics for Legacy ISDN Circuits - Image 3](https://m.media-amazon.com/images/I/61ts9XStUpL.jpg) ![Networx ISDN BRI Loopback Tester - RJ45 S/T Interface (Pins 3-4 and 5-6) - Diagnostics for Legacy ISDN Circuits - Image 4](https://m.media-amazon.com/images/I/61mHFnAVLLL.jpg) ![Networx ISDN BRI Loopback Tester - RJ45 S/T Interface (Pins 3-4 and 5-6) - Diagnostics for Legacy ISDN Circuits - Image 5](https://m.media-amazon.com/images/I/61D+6kCak-L.jpg) --- ## 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.pe/products/163149025-networx-isdn-bri-loopback-tester-rj45-s-t-interface-pins](https://www.desertcart.pe/products/163149025-networx-isdn-bri-loopback-tester-rj45-s-t-interface-pins) --- *Product available on Desertcart Peru* *Store origin: PE* *Last updated: 2026-07-27*