Yeastar S20 VoIP PBX - Complete Step by Step Tutorial

Wed, 05 Nov 2025 14:59:21 +0000

In today's episode "Yeastar S20 VoIP PBX - Complete Step by Step Tutorial ".

Yeastar S20 is a VoIP PBX for Small Business.
It is a stand-alone PBX System that supports :
- 20 Users
- 10 Concurrent Calls
- Up to 4 FXS/FXO/BRI Ports
- Up to 1 GSM/3G/4G Channel
- 20 VoIP Trunks

It has a modular design with 2 onboard module slots.
S20 PBX provides you with many features such as :
- Call Transfer
- Music On Hold
- Video Calls
- IVR
- Ring Group
- Call Recordings

For this tutorial O2 Module will be used that supports 2 PSTN Lines
and instead of Desk Phones, mobile devices will be used with Linkus Softphone App.

Watching this Tutorial you will learn how to make Outgoing Calls and how to apply different rules.
How to use Interactive Voice Response known as IVR which is a telephone technology that interacts with Incoming Calls.

Finally we will create 2 scenarios for Incoming Calls : 1 for Working Days and 1 for Weekends.

AllWan (Yeastar's Products Distributor in Greece) : https://www.allwan.gr

Yeastar S20 PBX (Official WebSite) : https://www.yeastar.com/s20-voip-pbx/

S20 PBX on Amazon (Affiliate Link) : https://amzn.to/3bsuXGG
O2 Module (Affiliate Link) : https://amzn.to/3cC2xu1
UniFi 8 Ports Switch - 1POE_IN + 1 POE_OUT (Affiliate Link) : https://amzn.to/2VHsMZ8

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For my drawings i used SmartDraw : https://www.smartdraw.com/