---
product_id: 378141472
title: "RJ11 Coupler, 2 Pack Telephone Phone Line Connector Coupler RJ11 6P4C Inline Keystone Jack Female to Female Straight Telephone Cable Cord Extension White"
brand: "rfadapter"
price: "€ 22.51"
currency: EUR
in_stock: true
reviews_count: 5
category: "Rf Adapter"
url: https://www.desertcart.nl/products/378141472-rj11-coupler-2-pack-telephone-phone-line-connector-coupler-rj11
store_origin: NL
region: Netherlands
---

# Low signal attenuation for crystal-clear calls RJ11 6P4C female-to-female coupler Compact, durable, and easy plug-and-play install RJ11 Coupler, 2 Pack Telephone Phone Line Connector Coupler RJ11 6P4C Inline Keystone Jack Female to Female Straight Telephone Cable Cord Extension White

**Brand:** rfadapter
**Price:** € 22.51
**Availability:** ✅ In Stock

## Summary

> 🔌 Connect smarter, talk clearer — never miss a beat!

## Quick Answers

- **What is this?** RJ11 Coupler, 2 Pack Telephone Phone Line Connector Coupler RJ11 6P4C Inline Keystone Jack Female to Female Straight Telephone Cable Cord Extension White by rfadapter
- **How much does it cost?** € 22.51 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nl](https://www.desertcart.nl/products/378141472-rj11-coupler-2-pack-telephone-phone-line-connector-coupler-rj11)

## Best For

- rfadapter enthusiasts

## Why This Product

- Trusted rfadapter brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Crystal-Clear Audio:** Experience high-fidelity sound with strong anti-interference technology for flawless conversations.
- • **Worry-Free Warranty:** Backed by 12 months of dedicated customer support for your peace of mind.
- • **Seamless Line Extension:** Effortlessly connect and extend your telephone lines without signal loss or distortion.
- • **Universal Compatibility:** Works flawlessly with all RJ11 devices—landlines, fax machines, and answering systems included.
- • **Compact & Durable Design:** Sleek, space-saving form factor built to last in any home or office setup.

## Overview

The RFAdapter RJ11 Coupler 2-Pack offers a reliable, compact solution to extend telephone lines with zero signal loss. Featuring high-fidelity sound quality, strong anti-interference capabilities, and universal RJ11 compatibility, it’s perfect for professional and home environments alike. Easy to install and backed by a 12-month warranty, this coupler ensures your calls stay crystal clear and uninterrupted.

## Description

RJ11 inline coupler is used to connect and extend two existing telephone lines with R11 telephone connector at both ends through telephone through box.Compress all the spare space, accurate signal transmission, small and exquisite, compact and durable. Easy to install and no static or distortion of voices.It has high fidelity sound quality, exquisite workmanship, strong anti-interference ability and low signal attenuationcoefficient. Provides good solid connection without signal loss.Universally compatible with all RJ11 devices such as landline phones, fax or answering machines etc. Wide range of use: family, study, living room, bedroom, office, business meeting, education, entertainment, etc.We offer worry-free warranty and friendly customer service within 12 months for your confident purchase. If you are not satisfied with any product, please don’t hesitate to contact us, we will serve you our best.

Review: Ótimo. Atendeu às minhas necessidades. Recomendo.
Review: Works as advertised and I am using them now.

## Features

- RJ11 inline coupler is used to connect and extend two existing telephone lines with R11 telephone connector at both ends through telephone through box.
- Compress all the spare space, accurate signal transmission, small and exquisite, compact and durable. Easy to install and no static or distortion of voices.
- It has high fidelity sound quality, exquisite workmanship, strong anti-interference ability and low signal attenuationcoefficient. Provides good solid connection without signal loss.
- Universally compatible with all RJ11 devices such as landline phones, fax or answering machines etc. Wide range of use: family, study, living room, bedroom, office, business meeting, education, entertainment, etc.
- We offer worry-free warranty and friendly customer service within 12 months for your confident purchase. If you are not satisfied with any product, please don’t hesitate to contact us, we will serve you our best.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B08L67FQ8T |
| Best Sellers Rank | #15,467 in Electronics ( See Top 100 in Electronics ) #24 in Telephone Cables |
| Item model number | RFAdapter Telephone Wires |
| Manufacturer | RFAdapter |
| Package Dimensions | 4.6 x 3.81 x 1.6 cm; 9 g |

## Product Details

- **Brand:** RFAdapter
- **Cable type:** Telephone
- **Compatible devices:** Telephone
- **Connector type:** RJ11
- **Special features:** Compact

## Images

![RJ11 Coupler, 2 Pack Telephone Phone Line Connector Coupler RJ11 6P4C Inline Keystone Jack Female to Female Straight Telephone Cable Cord Extension White - Image 1](https://m.media-amazon.com/images/I/41q8B-I7+rL.jpg)

## Questions & Answers

**Q: I tested the polarity and the coupler changes the polarity of the lines compared to when polarity checked at outlet before coupler used. PIN layout?**
A: Yes, many of these couplers are simple, straight thru pin 2-5 to 2-5 and do not properly crossover/reverse the pins to maintain the continuity on the same wires throughout both cables.

If using this type of straight thru coupler, you'll need to either use two of them (plus an extra "bridge" cable) or wire up your own custom crossover cable to correct the pin-out issue.

**Q: Does this work for two-line phones?**
A: If there are two lines connected to the phone that you want to extend with "extension chords" (connect to longer phone lines), you would need on coupler for each line.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by S***A on 28 March 2025*

Ótimo. Atendeu às minhas necessidades. Recomendo.

### ⭐⭐⭐⭐⭐ Review
*by O***R on 1 November 2025*

Works as advertised and I am using them now.

### ⭐⭐⭐⭐⭐ Review
*by B***T on 20 December 2024*

Couldn't find these anywhere else. Perfect for what I needed to extend my phone system. Very Happy.

## Frequently Bought Together

- RJ11 Coupler, 2 Pack Telephone Phone Line Connector Coupler RJ11 6P4C Inline Keystone Jack Female to Female Straight Telephone Cable Cord Extension Adapter White
- Ubramac 15 Feet Long Telephone Extension Cord Phone Cable Line Wire, with Standard RJ11 Plug and 1 in-Line Couplers and 15 Cable Clip Holders-White

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*Product available on Desertcart Netherlands*
*Store origin: NL*
*Last updated: 2026-01-27*