---
product_id: 7877580
title: "Networx T1 / E1 / PRI Crossover Adapter - RJ45 Male to Female - Converts Ethernet Patch Cable to Telecom Crossover - for Router Labs and Legacy Muxes"
brand: "networx®"
price: "¥3267"
currency: JPY
in_stock: true
reviews_count: 8
category: "Networx®"
url: https://www.desertcart.jp/products/7877580-networx-t1-e1-pri-crossover-adapter-rj45-male-to-female
store_origin: JP
region: Japan
---

# Swaps Tx/Rx pairs for T1/PRI crossover Compact, toolkit-friendly adapter Lifetime warranty for peace of mind Networx T1 / E1 / PRI Crossover Adapter - RJ45 Male to Female - Converts Ethernet Patch Cable to Telecom Crossover - for Router Labs and Legacy Muxes

**Brand:** networx®
**Price:** ¥3267
**Availability:** ✅ In Stock

## Summary

> 🔗 Upgrade your network game with the ultimate crossover adapter—because your toolkit deserves the best!

## Quick Answers

- **What is this?** Networx T1 / E1 / PRI Crossover Adapter - RJ45 Male to Female - Converts Ethernet Patch Cable to Telecom Crossover - for Router Labs and Legacy Muxes by networx®
- **How much does it cost?** ¥3267 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/7877580-networx-t1-e1-pri-crossover-adapter-rj45-male-to-female)

## 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

- • **Space-Saving Design:** Compact form factor eliminates the need to carry bulky specialized crossover cables.
- • **Lifetime Warranty Assurance:** Built to last with Networx’s lifetime warranty, ensuring reliable performance every time.
- • **Legacy Telecom Compatibility:** Supports legacy multiplexers, J1 interfaces, and ISDN PRI PBX systems requiring null modem signals.
- • **Essential for Router Labs & Training:** Enables back-to-back router connections (DTE-DTE) via serial WAN cards effortlessly.
- • **Seamless T1/PRI Crossover Conversion:** Transforms any standard Ethernet patch cable into a telecom crossover with a simple snap.

## Overview

The Networx T1/E1/PRI Crossover Adapter converts any standard straight-through Ethernet patch cable into a telecom crossover cable by swapping transmit and receive pairs. Ideal for router labs, legacy telecom hardware, and training environments, this compact RJ45 male-to-female adapter supports critical DTE-DTE connections and null modem signals. Backed by a lifetime warranty, it’s a must-have for professionals seeking reliable, space-saving connectivity solutions.

## Description

Convert Patch Cables to T1 / PRI Crossover Wiring. Eliminate the need to stock specialized crossover cables for telecom installations. The Networx T1 / E1 / PRI Crossover Adapter snaps onto any standard straight-through Ethernet patch cord to create a T1 or ISDN PRI Crossover connection (swapping the Transmit and Receive pairs). This tool is critical for Router Labs, allowing you to connect routers back-to-back (DTE-DTE) via serial WAN cards, or for interconnecting legacy Muxes, J1 interfaces, and PBX hardware that require a null modem signal.

Review: 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.
Review: So easy and convenient to install. - So easy and convenient to install.

## Features

- TELECOM CROSSOVER WIRING: Converts any standard straight-through Ethernet patch cord into a T1 / PRI Crossover cable by swapping the Transmit and Receive pairs (Pins 1-4 and 2-5).
- ROUTER LAB ESSENTIAL: Critical for connecting routers or Voice Gateways back-to-back (DTE-DTE) via serial WAN cards in lab environments or training setups.
- LEGACY MUX AND PBX SUPPORT: Perfect for interconnecting telecom hardware that requires a null modem signal, such as legacy multiplexers, J1 interfaces, or ISDN PRI PBX systems.
- COMPACT ADAPTER: Saves space in your toolkit by eliminating the need to carry specialized T1, E1, or PRI crossover cables.
- LIFETIME WARRANTY: Backed by the Networx Lifetime Warranty.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00E4OKJPO |
| Best Sellers Rank | #256 in Cable Gender Changers #12,341 in Computer Cables & Interconnects |
| Brand | Networx® |
| Color | Blue |
| Compatible Devices | PC |
| Connector Type | RJ45 |
| Customer Reviews | 4.4 out of 5 stars 91 Reviews |
| Finish | Matte |
| Finish Type | Matte |
| Global Trade Identification Number | 00845425016553 |
| 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 Number | LB-T1E1X |
| Number of Items | 1 |
| Number of Ports | 2 |
| Package Quantity | 1 |
| UPC | 845425016553 |
| Unit Count | 1.0 Count |
| Warranty Type | Lifetime |

## Product Details

- **Compatible Devices:** PC
- **Connector Type:** RJ45
- **Color:** Blue
- **Item dimensions L x W x H:** 3.56 x 3.25 x 0.78 inches
- **Brand:** Networx®

## Images

![Networx T1 / E1 / PRI Crossover Adapter - RJ45 Male to Female - Converts Ethernet Patch Cable to Telecom Crossover - for Router Labs and Legacy Muxes - Image 1](https://m.media-amazon.com/images/I/71Bedtyqb7L.jpg)

## Available Options

This product comes in different **Style** options.

## Questions & Answers

**Q: Can you use this on a PRI circuit?**
A: As a loop back it will work will not function as a pass through. It works great for testing a new circuit or test a problem on an circuit that has a problem.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Simple and good insurance all will work fine. Good craftsmanship.
*by S***P on March 8, 2025*

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.

### ⭐⭐⭐⭐⭐ So easy and convenient to install.
*by T***N on November 16, 2025*

So easy and convenient to install.

### ⭐⭐⭐⭐⭐ T1/E1
*by S***O on June 7, 2024*

WORKS AWESOME AND VERY TIME EFFICIENT.

## Frequently Bought Together

- Networx® T1/E1 RJ45 Crossover Adapter
- Cable Matters 2-Pack Crossover Adapter (Crossover Cable Adapter)
- Belkin 6-Foot CAT5e Crossover Networking Cable (Red)

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**Shop now:** [https://www.desertcart.jp/products/7877580-networx-t1-e1-pri-crossover-adapter-rj45-male-to-female](https://www.desertcart.jp/products/7877580-networx-t1-e1-pri-crossover-adapter-rj45-male-to-female)

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-02-10*