---
product_id: 64092514
title: "Maincore 10cm RJ11 to BT Telephone Socket Female 4 Wire Adapter Extender 6P4C Landline Phone Plug Cable Adaptor (US To UK..etc)."
brand: "maincore"
price: "₩22957"
currency: KRW
in_stock: true
reviews_count: 1
url: https://www.desertcart.kr/products/64092514-maincore-10cm-rj11-to-bt-telephone-socket-female-4-wire
store_origin: KR
region: South Korea
---

# Full PSTN master functionality Universal BT & RJ11 compatibility 10cm compact length Maincore 10cm RJ11 to BT Telephone Socket Female 4 Wire Adapter Extender 6P4C Landline Phone Plug Cable Adaptor (US To UK..etc).

**Brand:** maincore
**Price:** ₩22957
**Availability:** ✅ In Stock

## Summary

> 🔗 Bridge your global calls with ease and style!

## Quick Answers

- **What is this?** Maincore 10cm RJ11 to BT Telephone Socket Female 4 Wire Adapter Extender 6P4C Landline Phone Plug Cable Adaptor (US To UK..etc). by maincore
- **How much does it cost?** ₩22957 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.kr](https://www.desertcart.kr/products/64092514-maincore-10cm-rj11-to-bt-telephone-socket-female-4-wire)

## Best For

- maincore enthusiasts

## Why This Product

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

## Key Features

- • **Plug & Play Simplicity:** No drivers or batteries needed—just connect and communicate.
- • **Compact & Discreet Design:** At just 10cm, it fits perfectly in any setup without clutter.
- • **Robust PSTN Master Support:** Guaranteed to work flawlessly with all UK phone systems.
- • **Certified Quality Assurance:** RoHS and UL certified for safe, reliable performance.
- • **Seamless Cross-Compatibility:** Effortlessly connect US RJ11 sockets to UK BT plugs without a hitch.

## Overview

The Maincore 10cm RJ11 to BT Telephone Socket Adapter is a compact, certified cable adaptor designed to connect US-style RJ11 sockets to UK BT plugs. Supporting all standard telephone systems and full PSTN master functionality, it ensures seamless, reliable landline communication without the need for batteries or additional drivers.

## Description

The Adaptor is a full PSTN master and will work with any UK phone & phone system.

## Features

- 1x RJ11 Male - 1x BT Female
- This adaptor enables you to connect a BT plug to an RJ11 (us style) socket.
- Compatible with all telephone systems using standard BT and RJ11 sockets.
- The Adaptor is a full PSTN master and will work with any UK phone & phone system.
- 10cm long

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | Maincore |
| Part number | mcorebtrj11 |
| Item Weight | 20 g |
| Package Dimensions | 7 x 5 x 1.5 cm; 20 g |
| Item model number | bt to rj11 |
| Size | 10 cm |
| Colour | white |
| Shape | Round |
| Specification met | RoHS, UL |
| Special Features | Telephone |
| Batteries included? | No |
| Batteries Required? | No |

## Product Details

- **Brand:** Maincore
- **Connector type:** RJ11
- **Cable type:** Component
- **Compatible devices:** Telephone
- **Special feature:** Telephone

## Images

![Maincore 10cm RJ11 to BT Telephone Socket Female 4 Wire Adapter Extender 6P4C Landline Phone Plug Cable Adaptor (US To UK..etc). - Image 1](https://m.media-amazon.com/images/I/61WDI6Sjp9L.jpg)
![Maincore 10cm RJ11 to BT Telephone Socket Female 4 Wire Adapter Extender 6P4C Landline Phone Plug Cable Adaptor (US To UK..etc). - Image 2](https://m.media-amazon.com/images/I/61Mm1gHpoXL.jpg)
![Maincore 10cm RJ11 to BT Telephone Socket Female 4 Wire Adapter Extender 6P4C Landline Phone Plug Cable Adaptor (US To UK..etc). - Image 3](https://m.media-amazon.com/images/I/519GXeZr3JL.jpg)
![Maincore 10cm RJ11 to BT Telephone Socket Female 4 Wire Adapter Extender 6P4C Landline Phone Plug Cable Adaptor (US To UK..etc). - Image 4](https://m.media-amazon.com/images/I/61k1G8XwYbL.jpg)
![Maincore 10cm RJ11 to BT Telephone Socket Female 4 Wire Adapter Extender 6P4C Landline Phone Plug Cable Adaptor (US To UK..etc). - Image 5](https://m.media-amazon.com/images/I/61FPI6OjFoL.jpg)

## Customer Reviews

### ⭐ 







  
  
    Defective out of the bag
  

*by J***E on Reviewed in the United Kingdom on 30 October 2018*

3 of the 4 wires where not connected.  They had snapped where they were soldered to the pins.

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**Shop now:** [https://www.desertcart.kr/products/64092514-maincore-10cm-rj11-to-bt-telephone-socket-female-4-wire](https://www.desertcart.kr/products/64092514-maincore-10cm-rj11-to-bt-telephone-socket-female-4-wire)

---

*Product available on Desertcart South Korea*
*Store origin: KR*
*Last updated: 2026-03-14*