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Yeastar S20 – S-Series VoIP PBX for Small Business

Name: Yeastar S20 - S-Series VoIP PBX for Small Business
SKU: 35835
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KSh 29,900.00

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Description

Yeastar S20 — S-Series VoIP PBX System for Small Business | Complete Unified Communications Solution

The Smart Phone System That Transforms How Small Businesses Communicate

Your small business deserves big-business communication power — without the big-business price tag. The Yeastar S20 VoIP PBX is the all-in-one telephony solution engineered specifically for growing teams who need professional, reliable, and scalable phone system infrastructure from day one.

Gone are the days of expensive legacy PBX hardware, tangled analog lines, and per-seat licensing fees that drain your budget. The Yeastar S-Series S20 brings enterprise-grade Unified Communications to small businesses with a system that is simple to deploy, effortless to manage, and powerful enough to grow alongside your ambitions.

Whether you are a startup building your first phone system, a retail operation needing seamless customer call handling, or a remote-first team demanding crystal-clear VoIP connectivity — the Yeastar S20 is the last phone system you will ever need to outgrow.

What Is the Yeastar S20? Core Specifications at a Glance

The Yeastar S20 is a hardware-based IP PBX appliance built on Yeastar’s proven S-Series platform. Compact, modular, and feature-packed, it punches far above its weight class:

Up to 20 Users & 10 Concurrent Calls — perfect for small offices and growing teams
2 Module Slots — support for analog, BRI, GSM/3G/4G, or PSTN connectivity
SIP Trunk Support — connect to any VoIP provider or hosted SIP service
Built-in Auto Attendant (IVR) — greet callers professionally 24/7
Voicemail to Email — never miss a message, regardless of where you work
Web-Based Management GUI — intuitive browser interface, no CLI expertise needed
Compatible with 150+ SIP IP Phones — works with Yealink, Fanvil, Grandstream, Cisco & more
Linkus UC Softphone Integration — extend your PBX to mobile and desktop apps
Remote Work Ready — built-in VPN support for distributed teams

Why Small Businesses Are Switching to the Yeastar S20 VoIP PBX

Stop Paying for a Phone System That Does Not Work for You

Traditional landline PBX systems were built for a world that no longer exists — fixed offices, limited mobility, and IT teams with deep telephony expertise. The Yeastar S20 was built for today: cloud-connected, mobile-friendly, and managed in minutes through a clean web interface.

Here is what small business owners say they love most:

No monthly subscription fees for core PBX features — pay once, use forever
No specialized telephony engineers needed — set up and manage it yourself
No ripping out existing infrastructure — modular FXO/FXS ports support legacy analog lines
No compromising on features — get call queues, ring groups, IVR, and CDR reporting like the big players

The S20 is proof that professional communications infrastructure does not have to cost a fortune.

Modular Connectivity — Built to Match Your Exact Setup

One PBX. Any Combination of Lines.

What makes the Yeastar S20 genuinely unique among small business PBX systems is its dual expansion module slots. This means you are not locked into a single connectivity type — you build the system that fits your business:

EX08 Module (FXO/FXS) — connect up to 8 analog PSTN lines or analog desk phones
B2 Module (BRI/ISDN) — for businesses with existing ISDN BRI infrastructure
GSM/3G/4G Module — make and receive calls directly over mobile networks — ideal for areas with unreliable fixed-line service
Mix and Match — combine module types across both slots for a truly hybrid deployment

This modular design means the S20 grows and adapts with your business — add a SIP trunk today, bring in a GSM module next quarter, and never replace the core hardware.

Unified Communications Features That Rival Enterprise Systems

Your Team Deserves More Than Just a Dial Tone

The Yeastar S20 is loaded with UC features that make every interaction with your customers and colleagues smoother, faster, and more professional:

Call Management

Auto Attendant / IVR with multi-level menus
Call Queuing with hold music and position announcements
Ring Groups for team-based call distribution
Call Recording for compliance and training
Call Transfer, Forward, and Pickup
Do Not Disturb (DND) per extension

Mobility & Remote Work

Linkus Mobile App (iOS & Android) — turn any smartphone into a full office extension
Linkus Desktop Client (Windows & Mac) — softphone with presence and chat
Remote Extension Registration — support home workers and branch offices seamlessly
Built-in VPN Server — secure remote access without third-party VPN appliances

Reporting & Visibility

Call Detail Records (CDR) — full logs of every inbound and outbound call
Call Statistics Dashboard — monitor team performance and call volume trends
Voicemail with Email Notification — audio files delivered straight to your inbox

Linkus UC Clients — Your PBX in Your Pocket

Work From Anywhere. Sound Like You Are in the Office.

One of the most powerful features bundled with the Yeastar S20 is Linkus — Yeastar’s free Unified Communications client available for mobile, desktop, and web browsers.

With Linkus, your team can:

Make and receive office calls on personal smartphones — without revealing personal numbers
Transfer calls between mobile and desk phone seamlessly mid-conversation
See colleague presence status — know who is available, on a call, or away
Access the company directory from any device, anywhere in the world
Join conference calls with a single tap

For remote-first businesses and hybrid teams, Linkus transforms the S20 from a physical appliance into a fully distributed cloud-like phone system — without any monthly cloud fees.

Who Is the Yeastar S20 Perfect For?

Real Deployments. Real Results.

The S20 is trusted across industries where professional communication is non-negotiable:

Professional Services Firms — law offices, accountants, and consultants needing call recording and IVR
Medical & Dental Clinics — appointment booking queues, after-hours routing, and HIPAA-aware call handling
Retail & Hospitality Businesses — handle customer inquiries across multiple locations professionally
Real Estate Agencies — mobile-first teams that need office call handling on the go
Logistics & Courier Companies — dispatcher-to-driver communication over GSM modules
Remote-First Startups — a professional phone presence without a physical office

Easy Setup. Zero Telephony Expertise Required.

From Unboxing to First Call in Under an Hour

One of the most common hesitations small business owners have about VoIP PBX systems is complexity. The Yeastar S20 eliminates that concern entirely:

Step 1 — Connect the S20 to your network via Ethernet
Step 2 — Access the web GUI from any browser on your local network
Step 3 — Use the Setup Wizard to configure your SIP trunk and extensions in minutes
Step 4 — Register your IP phones or Linkus clients — plug and play with auto-provisioning
Step 5 — Configure your IVR, ring groups, and call routing visually — no coding required

Yeastar’s Auto Provisioning supports over 150 SIP phone models, meaning your desk phones self-configure the moment they connect. IT deployment has never been this painless.

Security You Can Trust — Enterprise Protection for Small Business

Your Communications Deserve Military-Grade Protection

The Yeastar S20 takes security seriously — because your business conversations are confidential:

SRTP & TLS Encryption — all calls encrypted end-to-end in transit
Built-in Firewall & IP Blacklisting — automatically blocks malicious SIP traffic
Fail2Ban Integration — brute-force attack prevention on all authentication endpoints
Secure VPN Tunneling — remote workers connect safely without exposing your PBX to the internet
Permission-Based User Roles — control who can access what within the management interface

Frequently Asked Questions About the Yeastar S20 PBX

Q: How many users can the Yeastar S20 support? The S20 supports up to 20 registered users and 10 simultaneous calls — making it the ideal choice for small offices, startups, and branch deployments.

Q: Does the Yeastar S20 work with my existing analog phone lines? Yes. By installing an EX08 FXO module in one of the expansion slots, you can connect up to 8 standard PSTN analog lines, preserving your existing phone service contracts.

Q: Can remote workers use the Yeastar S20? Absolutely. The S20 supports remote SIP extension registration and includes the Linkus mobile and desktop clients for iOS, Android, Windows, and Mac — making remote work fully supported.

Q: Does it support SIP trunks? Yes. The S20 is fully SIP trunk compatible and works with virtually every VoIP provider globally, including Twilio, VoIP.ms, RingCentral, and local regional carriers.

Q: Is there a monthly fee for using the Yeastar S20? No. The S20 is a one-time hardware purchase. Core PBX features and Linkus client access are included. Optional cloud management through Yeastar Central Management (YCM) may involve subscription fees for advanced remote management.

Q: Can I upgrade from S20 to a larger Yeastar model later? Yes. The S-Series lineup scales from S20 all the way to the S412 (supporting 500 users), ensuring your investment in training and configuration knowledge carries forward.

The Bottom Line — Why the Yeastar S20 Is the Smartest Phone System Investment for Small Business

You built your business with intention — every decision deliberate, every investment calculated. Your phone system should be no different. The Yeastar S20 VoIP PBX delivers everything a growing small business needs to communicate professionally, serve customers brilliantly, and empower a mobile workforce — all from a single, affordable hardware appliance.