---
product_id: 138916696
title: "Yeastar S20 - PBX Business Phone System (Barebones) (No modules)"
brand: "yeastar"
price: "₩865609"
currency: KRW
in_stock: false
reviews_count: 2
url: https://www.desertcart.kr/products/138916696-yeastar-s20-pbx-business-phone-system-barebones-no-modules
store_origin: KR
region: South Korea
---

# Scalable for growing teams 10 concurrent calls max 2 onboard modular slots Yeastar S20 - PBX Business Phone System (Barebones) (No modules)

**Brand:** yeastar
**Price:** ₩865609
**Availability:** ❌ Out of Stock

## Summary

> 📞 Elevate your office calls—modular, scalable, and built to grow with you!

## Quick Answers

- **What is this?** Yeastar S20 - PBX Business Phone System (Barebones) (No modules) by yeastar
- **How much does it cost?** ₩865609 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.kr](https://www.desertcart.kr/products/138916696-yeastar-s20-pbx-business-phone-system-barebones-no-modules)

## Best For

- yeastar enthusiasts

## Why This Product

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

## Key Features

- • **Compact Powerhouse:** Lightweight 1.5 lbs design packs robust PBX features for small businesses under 20 users.
- • **Seamless Growth Ready:** Easily add more users and concurrent calls as your team expands—future-proof your communication.
- • **Simple Setup, Instant Control:** User-friendly configuration perfect for SOHO environments—get your phone system running fast.
- • **Tailored Telephony Flexibility:** Customize your PBX with modular FXS, FXO, ISDN BRI, GSM/3G trunks to fit your exact business needs.
- • **Reliable Multi-Location Support:** Trusted by offices worldwide, delivering consistent VoIP performance and smooth call management.

## Overview

The Yeastar S20 is a compact, modular VoIP PBX system designed for small businesses with up to 20 users. Supporting 10 concurrent calls and flexible telephony interfaces, it offers customizable expansion via 2 onboard module slots. Ideal for SOHO setups, it balances simplicity with scalability, ensuring reliable communication as your business evolves.

## Description

S20 is a stand-alone telephone system offering an unrivalled range of features to small business with less than 20 users. It supports 10 concurrent calls and various combinations of telephony ports including FXS, PSTN, ISDN BRI, and GSM/CDMA/3G.

Review: Perfect - Very simple to configure for a soho pbx
Review: Older system is a bit slow, but works well with our voip service. - We have one of these running at one of our offices. It works pretty well, but is always a bit slow. We were going to get another one, but it looks like it has been replaced by the newer P series Yeastar. So we got that instead. It is faster. By faster, I mean the user interface just navigates and works faster. We have another office with a Grandstream PBX and it is awful. We use Clone Line service at all three locations and we replaced the Grandstream with Clone Line's cloud pbx, and it is by far the best system. We may eventually move everything to that, since it can run all 3 offices on a single system. But for now, the Yeastar works fine.

## Features

- Yeastar S-Series VoIP PBX provides flexible telephony interfaces combination while allowing for future scalability with unique modular design. Besides the built-in rich SIP capabilities, S-Series lets you decide what types of extensions and physical trunks you need in your telephone system. When your business grows, adding more users and concurrent calls is also possible with S-Series. With Yeastar S-Series, all the telephony interfaces are modular and customizable, whether it’s FXS, FXO, ISDN BRI, GSM/3G, or E1/T1/PRI. S20 has 2 onboard module slots.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07S6SCC86 |
| Best Sellers Rank | #581,694 in Office Products ( See Top 100 in Office Products ) #199 in PBX Phones & Systems |
| Customer Reviews | 4.7 4.7 out of 5 stars (4) |
| Date First Available | May 21, 2019 |
| Item Weight | 1.5 pounds |
| Item model number | YST-S20 |
| Manufacturer | Yeastar |
| Package Dimensions | 10.5 x 7.3 x 2.4 inches |

## Product Details

- **Answering System Type:** Digital
- **Brand:** YEASTAR
- **Color:** Black
- **Conference Call Capability:** 2 way
- **Dialer Type:** Single Keypad
- **Item Weight:** 0.68 Kilograms
- **Material:** Plastic
- **Multiline Operation:** Multi-Line Operation
- **Power Source:** Corded Electric
- **Telephone Type:** Corded

## Images

![Yeastar S20 - PBX Business Phone System (Barebones) (No modules) - Image 1](https://m.media-amazon.com/images/I/51+rg9UGhwL.jpg)
![Yeastar S20 - PBX Business Phone System (Barebones) (No modules) - Image 2](https://m.media-amazon.com/images/I/61WJ+1rtxyL.jpg)
![Yeastar S20 - PBX Business Phone System (Barebones) (No modules) - Image 3](https://m.media-amazon.com/images/I/61xQQte2C8L.jpg)
![Yeastar S20 - PBX Business Phone System (Barebones) (No modules) - Image 4](https://m.media-amazon.com/images/I/71RmDKKKgzL.jpg)
![Yeastar S20 - PBX Business Phone System (Barebones) (No modules) - Image 5](https://m.media-amazon.com/images/I/71hk-ojBkhL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Perfect
*by F***O on April 10, 2025*

Very simple to configure for a soho pbx

### ⭐⭐⭐⭐ Older system is a bit slow, but works well with our voip service.
*by M***S on May 23, 2025*

We have one of these running at one of our offices. It works pretty well, but is always a bit slow. We were going to get another one, but it looks like it has been replaced by the newer P series Yeastar. So we got that instead. It is faster. By faster, I mean the user interface just navigates and works faster. We have another office with a Grandstream PBX and it is awful. We use Clone Line service at all three locations and we replaced the Grandstream with Clone Line's cloud pbx, and it is by far the best system. We may eventually move everything to that, since it can run all 3 offices on a single system. But for now, the Yeastar works fine.

## Frequently Bought Together

- Yeastar S20 - PBX Business Phone System (Barebones) (No modules)
- YEASTAR YST-O2-2 FXO Ports Module, 2 FXO Ports, Ethernet, Compatible with PBX Series & Asterisk, Red, 1 Pound, Business Use
- Yealink T33G IP Phone, 4 VoIP Accounts. 2.4-Inch Color Display. Dual-Port Gigabit Ethernet, 802.3af PoE, Power Adapter Not Included (SIP-T33G)

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**Shop now:** [https://www.desertcart.kr/products/138916696-yeastar-s20-pbx-business-phone-system-barebones-no-modules](https://www.desertcart.kr/products/138916696-yeastar-s20-pbx-business-phone-system-barebones-no-modules)

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*Product available on Desertcart South Korea*
*Store origin: KR*
*Last updated: 2026-03-01*