---
product_id: 378141472
title: "RFAdapter 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: "€ 25.03"
currency: EUR
in_stock: true
url: https://www.desertcart.fi/products/378141472-rfadapter-rj11-coupler-2-pack-telephone-phone-line-connector-coupler
store_origin: FI
region: Finland
---

# Seamless RJ11 line extension Crystal-clear voice transmission Robust anti-interference design RFAdapter 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:** € 25.03
**Availability:** ✅ In Stock

## Summary

> 📞 Stay connected, sound sharp, and never miss a call!

## Quick Answers

- **What is this?** RFAdapter 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?** € 25.03 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.fi](https://www.desertcart.fi/products/378141472-rfadapter-rj11-coupler-2-pack-telephone-phone-line-connector-coupler)

## 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

- • **Premium Sound Fidelity:** Experience distortion-free calls with high-fidelity audio clarity.
- • **Compact & Durable Build:** Sleek, space-saving design built to last in any environment.
- • **Universal Compatibility:** Works flawlessly with all RJ11 devices—phones, fax, and more.
- • **Effortless Line Extension:** Connect and extend your phone lines instantly with RJ11 precision.
- • **Reliable Signal Integrity:** Strong anti-interference and low signal loss for uninterrupted communication.

## Overview

This 2-pack RJ11 Coupler enables seamless extension of telephone lines with a compact, durable design. Featuring high-fidelity sound quality and strong anti-interference capabilities, it ensures crystal-clear voice transmission without signal loss. Universally compatible with all RJ11 devices, it’s perfect for home or office setups requiring reliable phone line connections.

## Description

RJ11 Coupler, 2 Pack Telephone Phone Line Connector Coupler RJ11 6P4C Inline Keystone Jack Female to Female Straight Telephone Cable Cord Extension White

## 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 |
|---------------|-------|
| Brand | RFAdapter |
| Connector Type | RJ11 |
| Cable Type | Telephone |
| Compatible Devices | Telephone |
| Special Feature | Compact |
| Recommended Uses For Product | telephone line extension or combination |
| Color | White |
| Connector Gender | Female-to-Female |
| Shape | Round |
| Number of Pins | 6 |
| Unit Count | 2 Count |
| Indoor/Outdoor Usage | Indoor, Outdoor |
| Number of Items | 2 |
| Manufacturer | RFAdapter |
| UPC | 744306795542 |
| Part Number | ULRF0A0135A-2-CA |
| Item Weight | 0.317 ounces |
| Package Dimensions | 1.81 x 1.5 x 0.63 inches |
| Item model number | RFAdapter Telephone Wires |
| Item Package Quantity | 2 |
| Special Features | Compact |
| Batteries Included? | No |
| Batteries Required? | No |

## Product Details

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

## Images

![RFAdapter 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)

## Available Options

This product comes in different **Item Package Quantity** options.

## 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.

## 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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**Shop now:** [https://www.desertcart.fi/products/378141472-rfadapter-rj11-coupler-2-pack-telephone-phone-line-connector-coupler](https://www.desertcart.fi/products/378141472-rfadapter-rj11-coupler-2-pack-telephone-phone-line-connector-coupler)

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*Product available on Desertcart Finland*
*Store origin: FI*
*Last updated: 2026-01-22*